- Hep-pheno - listserv.vub.be

Seminar 14/12 by Sokratis Trifinopoulos (MIT)
by Miguel Vanvlasselaer 12 Dec '23

12 Dec '23

Dear all, We are happy to announce the seminar of Thursday 14/12 by Sokratis Trifinopoulos (MIT) in the Sancton Room at 12.30. Sokratis will talk about "PTA gravitational waves and James Webb early galaxies: from Primordial Black Holes to Axion Clusters. " Abstract: Recent observations have granted to us two unique insights into the early universe: the presence of a low-frequency stochastic gravitational wave background detected by the NANOGrav and Pulsar Timing Array (PTA) experiments and the emergence of unusually massive galaxy candidates at high redshifts reported by the James Webb Space Telescope (JWST). In this talk, I will consider the possibility that both observations have a common origin. First, I will scrutinize primordial black holes (PBHs) in the mass range between 106 and 1013 solar masses. While superheavy PBHs act as seeds of accelerated galaxy formation capable of explaining the JWST extreme galaxies, they can also form binary mergers that source gravitational waves which can be potentially identified as the PTA signal. The analysis is performed taking into account the constraints on the relevant region of the PBH parameter space including the novel bound imposed by the so-called Ultraviolet Luminosity Function (UV LF) of galaxies observed by the Hubble Space Telescope. Then, I will discuss minicluster seeds in the initial axion density field due to the decay of the axion string network in the post-inflationary scenario. For axions heavier than 10-25 eV , the resulting clusters have a significant impact on large-scale structure, which is also strictly constrained by the UV LF. Sokratis will stay with us until the end of the week. Do not hesitate to contact him for discussions. See you there, Kind regards, Miguel

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solstice winter meeting 2023
by Alberto Mariotti 12 Dec '23

12 Dec '23

Dear All, if you plan to come to the winter solstice meeting, on 21 December 2023 in the ULB Solvay room, https://agenda.irmp.ucl.ac.be/event/5079/ please register now, we are ordering the food. Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Fwd: ULB PhysTH Seminar by Virgile Dandoy - 08/12/2023 at 11 am
by Alberto Mariotti 06 Dec '23

06 Dec '23

Hi All, this is instead the ULB seminar on Friday morning at 11:00. Depending on the plan of Sachiko, I might go. Cheers, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: Facchinetti Gaëtan <gaetan.facchinetti(a)ulb.be> > Subject: ULB PhysTH Seminar by Virgile Dandoy - 08/12/2023 at 11 am > Date: 5 December 2023 at 10:21:33 CET > To: GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be>, GRP_ULB_Sem_Add <GRP_physth_sem(a)ulb.be> > Resent-From: <alberto.mariotti(a)vub.be> > > Dear All, > > Virgile Dandoy (new postdoc in the service de Physique Théorique) kindly agreed to present his past and ongoing works during a seminar which will take place next Friday, the 8th of December, at 11am, in room 2.N7.110 (building NO, campus Plaine). More precisely, he will tell us about > > Clumpy Dark Matter Phenomenology: A Study of Axion Miniclusters and Primordial Black Holes > We investigate the possibility of dark matter forming small scale gravitationally bound structures. One notable illustration is given by the axion miniclusters. Emerging within a scenario where axions are produced after inflation, these structures consist of axions bound by gravitational forces, with a mass close to the one of the Moon with the radius of the Sun. Given that they would form as early as during the matter-radiation equality epoch, the initial population of axion miniclusters is subjects to many effects that alter, damage and even destroy them. We study how those structures would survive once they become bound in the galaxy and start interacting with stars. Finally, we show the typical signal in experiment we should expect once one of them encounter the Earth. We also study the new potential signal of gravitational waves from PTAs. In particular, we show that the formation of primordial black holes and the existing constrains on their abundance are seriously constraining some early universe scenarios. > > Best regards, > > Gaétan > > > You're receiving this message because you're a member of the GRP_ULB_Sem_Add group from Université Libre de Bruxelles. To take part in this conversation, reply all to this message. > > View group files <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Leave group <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Learn more about Microsoft 365 Groups <https://aka.ms/o365g> > >

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Fwd: JC 07/12/2023
by Alberto Mariotti 06 Dec '23

06 Dec '23

Hi All, this is the JC of tomorrow at ULB. I think I will go with a sandwich. Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: Korochkin Alexander <alexander.korochkin(a)ulb.be> > Subject: JC 07/12/2023 > Date: 5 December 2023 at 12:06:42 CET > To: GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be>, GRP_ULB_JC_Add <GRP_physth_jc(a)ulb.be> > Resent-From: <alberto.mariotti(a)vub.be> > > Dear all, > > I would like to announce that our next JC will be this Thursday at 12:30 in the room 2NO.708. > Christian kindly volunteered to talk about > > Gravitational Wave Signals From Early Matter Domination: Interpolating Between Fast and Slow Transitions > > based on <https://arxiv.org/abs/2308.00309>arXiv:2311.12340 <https://arxiv.org/abs/2311.12340> > > > Best, > Alexander > > > You're receiving this message because you're a member of the GRP_ULB_JC_Add group from Université Libre de Bruxelles. To take part in this conversation, reply all to this message. > > View group files <https://outlook.office365.com/owa/GRP_physth_jc@ulb.be/groupsubscription.as…> | Leave group <https://outlook.office365.com/owa/GRP_physth_jc@ulb.be/groupsubscription.as…> | Learn more about Microsoft 365 Groups <https://aka.ms/o365g>

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talk of Sachiko Kuroyanagi Wednesday 6 December at 13:30 (VUB)
by Alberto Mariotti 04 Dec '23

04 Dec '23

Dear All, here is the announcement of a talk of Sachiko Kuroyanagi who will be visiting VUB on the week 4-10 December. The talk is exceptionally on Wednesday 6 December at 13:30 (on St. Nicolas day ;) ). Sachiko will talk about "Tracking the origin of black holes with the stochastic gravitational wave background popcorn signal” Time and place: Wednesday 6 December at 13:30, in G/0-G.0.20 (Neutrino Room) at the IIHE Here the webpage of the seminar: https://indico.iihe.ac.be/event/1857/ Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Fwd: ULB PhysTH Seminar by Hyungjin Kim - 01/12/2023 at 11 am
by Alberto Mariotti 30 Nov '23

30 Nov '23

Hi guys, interesting seminar on Friday at 11 at ULB. Cheers, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: VERMA Sonali <sonali.verma(a)ulb.be> > Subject: ULB PhysTH Seminar by Hyungjin Kim - 01/12/2023 at 11 am > Date: 28 November 2023 at 13:47:51 CET > To: GRP_ULB_Sem_Add <GRP_physth_sem(a)ulb.be>, GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be> > Resent-From: <alberto.mariotti(a)vub.be> > > Dear All, > > This Friday, at 11 am the 01st of December, we will have the pleasure of welcoming Hyungjin Kim (DESY Hamburg) who will give us a seminar in room 2.N7.110 (building NO, campus Plaine). Hyungjin will tell us about > > "Probing fluctuations of ultralight dark matter with gravitational wave detectors" > > Ultralight dark matter is a compelling dark matter candidate. Recent numerical simulations have shown that it exhibits large-scale order-one density fluctuations due to wave interference. These density fluctuations could be understood as a quasiparticle whose size and mass could be of astronomical values. In this talk, I will discuss how these density fluctuations interact with gravitational wave (GW) detectors and the prospects of current and future GW detectors in probing dark matter density within or near the solar system. I will show that with future GW detectors, we could probe a few hundred times the local dark matter density within the solar system. > > Best regards, > Sonali > Gaétan > > > > > You're receiving this message because you're a member of the GRP_ULB_Sem_Add group from Université Libre de Bruxelles. To take part in this conversation, reply all to this message. > > View group files <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Leave group <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Learn more about Microsoft 365 Groups <https://aka.ms/o365g>

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JC 28/11 2pm (tomorrow)
by Miguel Vanvlasselaer 27 Nov '23

27 Nov '23

Dear everyone, JC tomorrow by Kevin on The unresolved stochastic background from compact binary mergers detectable by next-generation ground-based gravitational-wave observatories. This will be based on the paper [2310.02517] (arxiv.org)<https://aps.arxiv.org/abs/2310.02517> in the Sancton room tomorrow at 2pm. Best, hope to see you there, Miguel

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seminar of Noam Levi tomorrow at 14:00
by Alberto Mariotti 20 Nov '23

20 Nov '23

Dear All, this is a last minute announcement of a seminar for tomorrow Tuesday November 21 at 14:00 in the large seminar room 1G003 at the IIHE. Noam Levi (EPFL) will talk about "Supercooling window at weak and strong coupling" https://indico.iihe.ac.be/event/1855/ <https://indico.iihe.ac.be/event/1855/> Please share this announcement with possible interested people in your group. See you all there, Best, AM #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Fwd: EuCAPT Colloquium Tue Nov 14th 15.00 CET: Cosmology with gravitational-wave standard sirens, Nicola Tamanini
by Alberto Mariotti 09 Nov '23

09 Nov '23

FWI Also see below the planned colloquia in the next year. Ciao, A #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: Andrew Taylor <andrew.taylor(a)desy.de> > Subject: EuCAPT Colloquium Tue Nov 14th 15.00 CET: Cosmology with gravitational-wave standard sirens, Nicola Tamanini > Date: 9 November 2023 at 13:12:57 CET > To: EuCAPT-members(a)cern.ch > Resent-From: <alberto.mariotti(a)vub.be> > > Dear All, > > We are very pleased to announce the first colloquium in the EuCAPT virtual colloquia series for this academic year. > > The colloquium is scheduled at 15.00 CET on Tuesday, November 14: > > TITLE: Cosmology with gravitational-wave standard sirens > SPEAKER: Nicola Tamanini, Laboratoire des 2 Infinis-Toulouse, France > > ABSTRACT: Gravitational-wave (GW) cosmology has recently been established as a new observationally-driven research field, and is expected to expand rapidly in the future thanks to the increasing number of ever more accurate GW observations. In this talk I will review the current status of GW cosmological results and will survey the expectations for the future. I will first introduce the concept of "standard siren” reviewing its theoretical foundations and phenomenological applications. Standard sirens represent the most common methodology employed to extract cosmological information from GW data, including new tests of LCDM which cannot be performed with standard electromagnetic observations. I will then show how these methods are employed to produce cosmological constraints with current GW data collected by LIGO and Virgo, and how they will usher an era of precise GW cosmology with next generation GW observatories, such as the Einstein Telescope on the Earth and LISA in space. > > Full details (including zoom link): https://indico.cern.ch/category/12056/ <https://indico.cern.ch/category/12056/>. > > Best regards, > > Alessandra Silvestri > (on behalf of the EuCAPT colloquium task force) > > ************************************************************************************************* > > Calendar of upcoming EuCAPT virtual colloquia > (also available at https://indico.cern.ch/category/12056/ <https://indico.cern.ch/category/12056/>) > > > 12th December - speaker: Elisa Resconi (Technical University of Munich, Germany); topic: NGC1068 as a neutrino source > > 9th January - speaker: Jocelyn Bell Burnell (University of Oxford, UK); topic: Women in Physics > > 13th February - speaker: Antonella Castellina (INFN Torino, Italy); topic: UHECR recent results > > 12th March - speaker: Paolo Creminelli (ICTP Trieste, Italy); topic: Inflation > > 9th April - speaker: Sam Witte (University of Barcelona, Spain); topic: Axions > > 14th May - speaker: Shinji Mukohyama (Kyoto University, Japan); topic: Dark Energy > > 11th June - speaker: Antonio Riotto (University of Geneva, Switzerland); topic: Primordial Black Holes > > >

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JC 17/10
by Miguel Vanvlasselaer 06 Nov '23

06 Nov '23

Dear all, Next JC tomorrow tuesday at 2 pm in the Sancton room. Xander will talk about Glueball dark matter with https://inspirehep.net/literature/333829 and 1704.01804 . See you, Best, Miguel

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next visitors in our group: book this in your agenda
by Alberto Mariotti 03 Nov '23

03 Nov '23

Dear All, here a list of the visitors/seminar in the coming 4 months, so that we can plan in advance. Sachiko Kuroyanagi (Madrid): 4-8 December 2023 Sokratis Trifinopoulos (MIT): 11-15 December 2023 Germano Nardini, TBC (Stavanger U): 29-31 January 2024 Ville Vaskonen (Tallinn and Padua): 19-21 February 2024 Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Fwd: [allusers-iihe] HEP@VUB seminar: Dylan Frikken on the Radar Echo Telescope
by Alberto Mariotti 02 Nov '23

02 Nov '23

Hi guys, if you want free sandwiches, please register. Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: Mitja Desmet via allusers-iihe <allusers-iihe(a)listserv.vub.be> > Subject: [allusers-iihe] HEP@VUB seminar: Dylan Frikken on the Radar Echo Telescope > Date: 27 October 2023 at 12:00:00 CEST > To: "hep(a)listserv.vub.be" <hep(a)listserv.vub.be> > Cc: IIHE allusers <allusers-iihe(a)listserv.vub.be> > Reply-To: Mitja Desmet <Mitja.Desmet(a)vub.be> > > Dear all, > > We are happy to announce the return of the HEP@VUB seminars. We will kick off the academic year with a talk by Dylan Frikken from the Ohio State University, who will tell us about the Radar Echo Telescope. This new experiment has recently been deployed in Greenland and promises some exciting developments in the field of astroparticle physics. > > The seminar will be held in the J. Sacton room on the 9th of November at 12h. Drinks and sandwiches will be provided, but we kindly ask you to register beforehand on the Indico page: https://indico.iihe.ac.be/event/1909/ <https://indico.iihe.ac.be/event/1909/> . > > For the organisers, > > > > > MITJA DESMET > PhD Student > Physics Department > T +32 (0)2 629 34 55 > K G.1.59/D1 > > > _______________________________________________ > allusers-iihe mailing list -- allusers-iihe(a)listserv.vub.be <mailto:allusers-iihe@listserv.vub.be> > To unsubscribe send an email to allusers-iihe-leave(a)listserv.vub.be <mailto:allusers-iihe-leave@listserv.vub.be>

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seminar Santiago Jaraba Friday 27 October at 11:00 at VUB
by Alberto Mariotti 25 Oct '23

25 Oct '23

Dear All, I'm happy to announce the seminar of Santiago Jaraba (Madrid IFT) next week Friday 27 October at 11:00 in the room G.1.03 - J. Sacton (Building G) at VUB. Here the webpage of the event: https://indico.iihe.ac.be/event/1851/ Santiago will talk about Title: "Black hole hyperbolic encounters: numerical simulations and stochastic gravitational wave backgrounds" Abstract: "In this seminar, I will discuss hyperbolic encounters between black holes from two perspectives. First, from a numerical-relativity approach, with a focus on the emitted gravitational waves and a comparison to the standard binary black hole (BBH) case. Then, I will touch upon the spin-induction effect these black holes undergo when the encounters are close enough, discussing the consequences this has for the field of primordial black holes. The second part of the talk will concentrate on the stochastic gravitational wave backgrounds these hyperbolic encounters generate, discussing the main differences with the one produced by BBHs and addressing their detectability with current and next-generation detectors." Hope to see you all there, Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Fwd: ULB PhysTH Seminar by Simon Clery - 10/13/2023 at 11 am
by Alberto Mariotti 18 Oct '23

18 Oct '23

FYI #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: Facchinetti Gaëtan <gaetan.facchinetti(a)ulb.be> > Subject: Re: ULB PhysTH Seminar by Simon Clery - 10/13/2023 at 11 am > Date: 18 October 2023 at 14:23:53 CEST > To: GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be>, GRP_ULB_Sem_Add <GRP_physth_sem(a)ulb.be> > Resent-From: <alberto.mariotti(a)vub.be> > > Dear All, > > This week we have the pleasure to welcome Simon Clery (IJCLab, Université Paris-Saclay) who will give us a seminar on Friday the 20th of October at 11am in room 2.N7.110 (building NO, campus Plaine). He will tell us about > > Gravitational production of matter and radiation during reheating > I present some new results on particle production during the reheating after inflation. We focus on the late-time evolution of the scalar inflationary field, during its coherent oscillation regime. We specifically consider the production of dark matter and radiation, restricting our attention to gravitational interactions, including minimal and non-minimal coupling to gravity. We also consider leptogenesis through the gravitational production of heavy right-handed neutrinos during reheating. > > Best regards, > > Gaétan > > > > Le 13 oct. 2023 à 10:38, TYTGAT Michel <Michel.Tytgat(a)ulb.be> a écrit : > > Dear All, > We have the pleasure to invite you to the seminar by > Dr Aliaksei Kachanovich (Ruđer Bošković Institute, Zagreb) on > 'Flavour-Changing Neutral Current Processes Within the Standard Model and Beyond'. > The seminar is 11:00 am in the room 2 N7 110 (building NO, Campus Plaine). > In this talk, I will discuss the study of rare flavour-changing processes, which can provide us with insights into how we may need to modify or extend the Standard Model to address open problems such as CP-violation in Baryo- and Lepto-genesis, Dark Matter, the strong CP problem, neutrino mass origins, and more. The Standard Model has proven to be a highly successful theory with excellent experimental agreements, and additional forces or effects may manifest themselves in processes where contributions from known forces and effects are exceedingly small. I will primarily focus on two processes: the decay of the Higgs boson into two leptons and a photon, where the main contribution arises from a one-loop, and the decay of B-mesons into Kaons with a mediator to the Dark Sector. This talk is based on my research conducted during my Ph.D. at KIT, Karlsruhe, and during a short-term postdoc at the same institution (e-Prints: 2001.06516, 2003.01788, 2109.04426). > Kind regards, > Michel Ps: sorry for the late announcement. > -- > Michel H.G. Tytgat > Research Director FNRS – Professor ULB > Université Libre de Bruxelles (ULB) > Service de Physique Théorique > CP225, Bld du Triomphe 1050 Brussels, Belgium > +32 (0)2 650 55 70 > michel.tytgat(a)ulb.be > De : Facchinetti Gaëtan <gaetan.facchinetti(a)ulb.be> > Date : lundi, 28 août 2023 à 10:41 > À : GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be>, GRP_ULB_Sem_Add <GRP_physth_sem(a)ulb.be> > Objet : ULB PhysTH Seminar by Maxim Pospelov, 1 sept. 2023 > Dear All, > > Although the days shorten and the temperatures decrease, there is joy in the air for it is the beginning of the academic year and PhysTh seminars will start again. I am happy to announce that the first one will take place next Friday, the 1st of September, between 11am and 12pm. Maxim Pospelov, from the University of Minnesota, will tell us about Standard Model and EDMs (see abstract below). If you receive no further notifications from me, the seminar will take place in our seminar room: 2.N7.110. > Best regards, > Gaétan > > ———————————————— > Abstract > I review the main mechanisms that convert fundamental CP-violating parameters (theta_QCD and Kobayashi-Maskawa phase) to the observable electric dipole moments (EDMs). In light of recent experimental progress, the EDMs connected to electron spin (paramagnetic EDMs) are calculated. The limit on QCD theta angle is 2 * 10^(-8) and somewhat subdominant to neutron EDM, but can be improved. The Kobayashi-Maskawa phase contributes to paramagnetic EDMs at the level of 10^{-35} e cm in units of equivalent electron EDM, which is much larger than what was previously estimated. > ———————————————— > Seminars and Journal Clubs agenda: http://cp3.irmp.ucl.ac.be/PAI/month.php > ================ > ULB PhysTH Seminar by Maxim Pospelov (U. of Minnesota), 'Standard Model and EDMs', Room 2.N7.110 [BEL-center:pheno] > Dates : 1 sept. 2023, 11:00-12:00, UTC+2 > ================ > > > > You're receiving this message because you're a member of the GRP_ULB_Sem_Add group from Université Libre de Bruxelles. To take part in this conversation, reply all to this message. > > View group files <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Leave group <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Learn more about Microsoft 365 Groups <https://aka.ms/o365g>

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JC 10/10 2 pm
by Miguel Vanvlasselaer 07 Oct '23

07 Oct '23

Hello everyone, we restart our JC this week on tuesday. I would present the ideas on supercooling within SUSY symmetries with 2104.00747.pdf (arxiv.org)<https://arxiv.org/pdf/2104.00747.pdf> There is still a chance I have to cancel, in such case I would send a message. Best, hope to see you there, Miguel

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Fwd: Astroparticle postdoc in Bologna, deadline Nov 10
by Alberto Mariotti 06 Oct '23

06 Oct '23

Dear All, here below an announcement of a postdoc position in Bologna. Please circulate it among possible interested candidates. Best, Alberto > Begin forwarded message: > > From: Filippo Sala <f.sala(a)unibo.it> > Subject: Astroparticle postdoc in Bologna, deadline Nov 10 > Date: 6 October 2023 at 09:48:47 CEST > To: Filippo Sala <f.sala(a)unibo.it> > Cc: Silvia Pascoli <silvia.pascoli(a)unibo.it> > Resent-From: <alberto.mariotti(a)vub.be> > > Dear colleague, > > We have a postdoc opening in Bologna on astroparticle theory and phenomenology, details at > > https://inspirehep.net/jobs/2706306 > > I would be grateful if you could circulate the announcement among potentially interested candidates. > The deadline is pretty early, November 10. > > Best, > Filippo

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invited seminar Lorenzo Calibbi (Tuesday 3 October at 14:00)
by Alberto Mariotti 02 Oct '23

02 Oct '23

Dear All, I am happy to announce an invited seminar on Tuesday 3 October at 14:00, in the Large Seminar Room at the IIHE (G/1-G.1.03 - J. Sacton). Lorenzo Calibbi (Nankai University) will be visiting VUB and will give a talk about: "Majoron Dark Matter from Type II Seesaw" Here the indico page of the event: https://indico.iihe.ac.be/event/1809/ Please feel free to forward this announcement to potentially interested researchers in your group. Best Regards, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Fwd: [hep] Poster session Lounge Bar 26th October
by Alberto Mariotti 27 Sep '23

27 Sep '23

Dear All, The hep@vub group is organising a poster session on October 26 here at VUB, with some drinks, in a nice atmosphere to know more our young and not-young colleagues working on high-energy at VUB. It would be nice to participate, it starts at 16:30 so it will be really the end of your working day. If you have an already prepared poster (Hannah for instance), you could also present it. See here below and please register. Cheers, Alberto > Begin forwarded message: > > From: Yarno Merckx <Yarno.Merckx(a)vub.be> > Subject: [hep] Poster session Lounge Bar 26th October > Date: 7 September 2023 at 13:32:58 CEST > To: "hep(a)listserv.vub.be" <hep(a)listserv.vub.be> > > Hi everyone, > > The HEP@VUB Team is organizing a poster session in the Lounge Bar on the 26th of October from 16:30-18:30. Surrounded by snacks and drinks, PhD students and Postdocs get the opportunity to present their research in the form of a poster. This is the perfect moment to revive one of your old posters or make a new one for the occasion! > > If you are interested in showing your work or plan to attend without one, please indicate this in the registration form:https://indico.iihe.ac.be/event/1801/ . This event is also open to students. > > We are looking forward to welcoming you and hearing about your research! > > Kind regards, > > The HEP@VUB Team > _______________________________________________ > hep mailing list -- hep(a)listserv.vub.be <mailto:hep@listserv.vub.be> > To unsubscribe send an email to hep-leave(a)listserv.vub.be <mailto:hep-leave@listserv.vub.be>

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Fwd: GGI Lectures on the Theory of Fundamental Interactions (Jan 8 - Jan 26, 2024)
by Alberto Mariotti 26 Sep '23

26 Sep '23

FYI > Begin forwarded message: > > From: segreteria GGI <segreteriaggi(a)fi.infn.it> > Subject: GGI Lectures on the Theory of Fundamental Interactions (Jan 8 - Jan 26, 2024) > Date: 26 September 2023 at 10:19:24 CEST > To: ggi.participants(a)lists.fi.infn.it, ggi.students(a)lists.fi.infn.it > Reply-To: segreteria GGI <segreteriaggi(a)fi.infn.it> > > > > Dear Colleague, > > let us point your attention to the next edition of the Galileo Galilei > Institute (GGI) School on the Theory of Fundamental Interactions. > > Here is the website for the event: > https://www.ggi.infn.it/showevent.pl?id=486 > > The lectures are geared to Ph.D. students in High Energy Particle and > Astroparticle Physics. The aim of the school is to give a pedagogical > introduction to the basic concepts and tools needed for research, > covering the foundations of the subject at a deep and advanced level. > The main topics include the Standard Model of Particle Physics and its > extensions, Collider Physics, Quantum Field Theory, and Cosmology. > > Lectures will be given by: > > - Clifford CHEUNG (Caltech): Amplitudes > - Valerie DOMCKE (CERN): Gravitational Waves > - Adam FALKOWSKI (IJCLAB, Orsay): EFT with a touch of neutrinos > - Anson HOOK (University of Maryland): BSM and Naturalness > - Juan MALDACENA (IAS, Princeton): Theoretical Aspects of Inflation > - Andrea WULZER (ICREA & IFAE, Barcelona): Collider Physics > > The lectures will be in presence. > > There will be plenty of time for deep and thorough discussions with the > lecturers thanks to the offices and discussion room facilities offered > by the GGI. Also, all the courses will be video-recorded and they will > be available on the website in real-time. > > The school has no registration fee and we may also be able to provide > free accommodation for a good fraction of the participants. Please > circulate the information and encourage your students to come! The > poster of the school is attached to this email. > > The deadline for applications is Tuesday October 31st, 2023. > > Please do not hesitate to contact us in case you have any questions. > > Best regards, > > Francesco D'Eramo, > Roberto Franceschini, > Diego Redigolo, > Giulia Ricciardi, > Francesco Riva, > Andrea Tesi > > > > -- > Questa email è stata esaminata alla ricerca di virus dal software antivirus Avast. > www.avast.com

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Fwd: program of Lectures@PhysTH: Intro ML methods
by Alberto Mariotti 18 Sep '23

18 Sep '23

FYI > Begin forwarded message: > > From: LOPEZ HONOREZ Laura <Laura.Lopez.Honorez(a)ulb.be <mailto:Laura.Lopez.Honorez@ulb.be>> > Subject: program of Lectures@PhysTH: Intro ML methods > Date: 18 September 2023 at 16:33:03 CEST > To: GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be <mailto:GRP_phys_th@ulb.be>> > Cc: Bryan Zaldívar <bryan.zaldivar(a)ific.uv.es <mailto:bryan.zaldivar@ific.uv.es>> > Resent-From: <alberto.mariotti(a)vub.be <mailto:alberto.mariotti@vub.be>> > > Dear all, > > here is some more info on the Intro ML methods lectures that will take place in Solvay room at ULB (NO building 5th floor) on 2-5/10, see below and on the indico webpage <https://indico.iihe.ac.be/event/1805/> (the Tuesday-Thursday lectures can be found clicking on 2-4 in the menu "From the same series"). > > Notice that we have added two hours on Monday! > > Everyone is welcome and registration is open! > > Best, > > Laura > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > > Lectures@PhysTH: Introduction to Machine Learning methods > > Lecturer: Bryan Zaldivar > > Theoretical Physicist <https://inspirehep.net/authors/1239220?ui-citation-summary=true> and expert in applying machine learning methods <https://aiinitiative.science/people-institutions/> to HEP physics problems and beyond. > > Abstract: The main scope of these lectures is to provide the attendee with the basic mathematical/statistical knowledge to understand and use Machine Learning tools in her/his work. It is also conceived to be useful for practical implementations in Python language. The main focus will be on "Supervised Learning" techniques, considering both frequentist and Bayesian approaches. > The format is mostly blackboard-based, while sometimes python codes will be shown. A basic background on statistics would be beneficial from the attendees, although the lectures aim at starting at a very elementary level. > Scheduled per day (Solvay room) : > > Monday 2/10: 10-12h: > 1. Overview of ML. > 2. summary of statistics > > Tuesday 3/10: 10-12h: > 3. Regression & overfitting control > 4. Bayesian learning > > Wednesday 4/10: 15-17h > 5. Classification > 6. Neural networks > > Thursday 5/10: 14-16h > 7. To be defined, depending on the interest: > Hands-on session with Python on previous methods, or > Non-parametric methods, including Gaussian Processes (theory), or > Unsupervised Learning methods (theory) > > > -- > Laura Lopez Honorez > Service de Physique Théorique > ULB, CP 225 > Boulevard du Triomphe, > 1050 Bruxelles, Belgium > > office: 2N7 113 > tel: 0032 (0)2 650 55 19

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visit of Lorenzo Calibbi 2-6 October
by Alberto Mariotti 13 Sep '23

13 Sep '23

Hi guys, so Lorenzo Calibbi from Nankai University will visit us in the week from the 2 to the 6 of October. Lorenzo is an expert on flavour physics and dark matter. I will organize a seminar of him for Tuesday 3 October (in the usual JC time slot). Ah, by the way, I will soon send an email to restart our JC in October, after Lorenzo's visit. Best, Alberto #---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------#

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Workshop News From the Dark - ULB, September 11-13
by CLESSE Sébastien 05 Sep '23

05 Sep '23

Dear all, We organize at ULB the next workshop News From the Dark - Episode 8: from particle physics to cosmology, from September 11 to 13. You will find the program of the workshop and all the details here: https://indico.in2p3.fr/event/28968/ Registrations are still open (except for the conference dinner). Best regards, Sebastien. ===================== Sébastien Clesse Chargé de Cours, Francqui Docent T : +32 (0)2 650 5581 sebastien.clesse(a)ulb.ac.be<mailto:sebastien.clesse@ulb.ac.be> Service de Physique Théorique Boulevard du Triomphe, Campus de la Plaine, CP225 - 1050 Bruxelles http://www2.ulb.ac.be/sciences/physth/people_SClesse.html http://sebclesse.wixsite.com/clesse Adoptez l'éco-attitude. N'imprimez ce mail que si c'est nécessaire.

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Fwd: ULB PhysTH Seminar by Maxim Pospelov, 1 sept. 2023
by Alberto Mariotti 31 Aug '23

31 Aug '23

#---------------------------------------------------------------------# Alberto Mariotti Vrije Universiteit Brussel (VUB) https://we.vub.ac.be/HEPVUB Phone: +32 (0) 2 629 32 15 E-mail: alberto.mariotti(a)vub.be Address: Vrije Universiteit Brussel Physics Department Elementary Particles Research Group Pleinlaan 2, 1050 Brussels, Belgium #---------------------------------------------------------------------# > Begin forwarded message: > > From: Facchinetti Gaëtan <gaetan.facchinetti(a)ulb.be> > Subject: ULB PhysTH Seminar by Maxim Pospelov, 1 sept. 2023 > Date: 28 August 2023 at 10:41:10 GMT+2 > To: GRP_ULB_PhysTh <GRP_phys_th(a)ulb.be>, GRP_ULB_Sem_Add <GRP_physth_sem(a)ulb.be> > Resent-From: <alberto.mariotti(a)vub.be> > > Dear All, > > Although the days shorten and the temperatures decrease, there is joy in the air for it is the beginning of the academic year and PhysTh seminars will start again. I am happy to announce that the first one will take place next Friday, the 1st of September, between 11am and 12pm. Maxim Pospelov, from the University of Minnesota, will tell us about Standard Model and EDMs (see abstract below). If you receive no further notifications from me, the seminar will take place in our seminar room: 2.N7.110. > > Best regards, > > Gaétan > > ———————————————— > Abstract > I review the main mechanisms that convert fundamental CP-violating parameters (theta_QCD and Kobayashi-Maskawa phase) to the observable electric dipole moments (EDMs). In light of recent experimental progress, the EDMs connected to electron spin (paramagnetic EDMs) are calculated. The limit on QCD theta angle is 2 * 10^(-8) and somewhat subdominant to neutron EDM, but can be improved. The Kobayashi-Maskawa phase contributes to paramagnetic EDMs at the level of 10^{-35} e cm in units of equivalent electron EDM, which is much larger than what was previously estimated. > ———————————————— > > Seminars and Journal Clubs agenda: http://cp3.irmp.ucl.ac.be/PAI/month.php <http://cp3.irmp.ucl.ac.be/PAI/month.php> > > ================ > ULB PhysTH Seminar by Maxim Pospelov (U. of Minnesota), 'Standard Model and EDMs', Room 2.N7.110 [BEL-center:pheno] > Dates : 1 sept. 2023, 11:00-12:00, UTC+2 > ================ > > > You're receiving this message because you're a member of the GRP_ULB_Sem_Add group from Université Libre de Bruxelles. To take part in this conversation, reply all to this message. > > View group files <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Leave group <https://outlook.office365.com/owa/GRP_physth_sem@ulb.be/groupsubscription.a…> | Learn more about Microsoft 365 Groups <https://aka.ms/o365g> >

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Fwd: Second Circular -- CosmoLattice School ’23 (ONLINE), Sept 25-29 2023
by Alberto Mariotti 18 Aug '23

18 Aug '23

FYI > Begin forwarded message: > > From: "Daniel G. Figueroa" <daniel.figueroa(a)cern.ch <mailto:daniel.figueroa@cern.ch>> > Subject: Second Circular -- CosmoLattice School ’23 (ONLINE), Sept 25-29 2023 > Date: 18 August 2023 at 10:13:38 GMT+2 > To: "f.torrenti(a)uv.es <mailto:f.torrenti@uv.es>" <f.torrenti(a)uv.es <mailto:f.torrenti@uv.es>>, Adrien Florio <adrien.florio(a)stonybrook.edu <mailto:adrien.florio@stonybrook.edu>>, Jorge Baeza Ballesteros <jorge.baeza(a)ific.uv.es <mailto:jorge.baeza@ific.uv.es>>, Nicolás Loayza Romero <nicolas.loayza(a)ific.uv.es <mailto:nicolas.loayza@ific.uv.es>> > Cc: "Daniel G. Figueroa" <daniel.figueroa(a)cern.ch <mailto:daniel.figueroa@cern.ch>> > Resent-From: <alberto.mariotti(a)vub.be <mailto:alberto.mariotti@vub.be>> > > Dear friends, > > We would appreciate very much if you could distribute this announcement in the appropriate group-list(s) of your Institute or network. > > Thanks in advance, > Best wishes, > Dani > > ————————————————————— > > Dear colleagues, > > We apologise in advance if you receive this announcement multiple times. > > We would like to draw your attention about the Second edition of our School on Lattice Techniques for Cosmology, that we will organise ONLINE during September 25-29 2023. The school is aimed to provide a pedagogical introduction to lattice field theory techniques and their use to simulate the classical dynamics of interacting fields in an expanding background. The lectures will serve as an introduction to COSMOLATTICE, a public code developed for lattice simulations of early Universe scenarios. The use of CosmoLattice as a tool to simulate scalar and gauge field non-linear dynamics in an expanding universe will be presented in full detail. Modern applications to inflation, preheating, gravitational wave production, non-minimally coupled scalar field dynamics, axion-like field dynamics, and possibly others, will also be covered. The school is aimed to anyone who would like to learn (or simply improve their knowledge on) how to simulate in a lattice the dynamics of early Universe field theory scenarios. > > Registration will be open till Sept. 5th 2023, see > > https://indico.ific.uv.es/event/7055/ <https://indico.ific.uv.es/event/7055/> > > Observations: The school will be held ONLINE, during 25-29 Sept 2023. Applications can be accepted till Sept. 5th 2023. There is no fee to participate in the school. A preliminary schedule considering overlapping day-time windows within Europe, India and China has been set up. In order to do practice sessions, participants will need to have access to a personal computer or to a cluster. > > The program will cover: > > * Lattice field theory techniques: discretisation schemes, lattice gauge techniques, and more. > * Numerical algorithms for differential equations: Leapfrog, Verlet, Runge-Kutta, etc > * Overview of CosmoLattice: libraries, modularity, parallelisation, ... > * Lattice simulations of interacting fields in an expanding background: > - Scalar field dynamics with arbitrary potentials > - U(1) gauge theories with complex charged scalars > - SU(2) gauge theories with doublet charged scalars > * Modern applications to early Universe scenarios: > - Preheating scenarios and onset of radiation domination > - Production and evolution of gravitational waves > - Dynamics of derivatively coupled Axion-like fields > - Dynamics of non-minimally coupled scalar fields > - Others, if time permits > > > Lecturers: > > - J. Baeza-Ballesteros ....... IFIC, Valencia, Spain > - D. G. Figueroa ............. IFIC, Valencia, Spain > - A. Florio ................. Brookhaven Natl. Lab, US > - J. Lizarraga .............. UPV/EHU, Bilbao, Spain > - N. Loayza ................. IFIC, Valencia, Spain > - K. Marschall ............... IFIC, Valencia, Spain > - T. Opferkuch .............. Berkeley, California, US > - B. A. Stefanek ............. Zurich U., Switzerland > - F. Torrenti ................ IFIC, Valencia, Spain > - Ander Urio ................. UPV/EHU, Bilbao, Spain > > We look forward to seeing you online! > > Best wishes

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Fwd: Gravitational Waves with PTA Online Workshop on July 14
by Alberto Mariotti 14 Jul '23

14 Jul '23

> Begin forwarded message: > > From: Anish Ghoshal <anishghoshal1(a)gmail.com> > Subject: Re: Gravitational Waves with PTA Online Workshop on July 14 > Date: 14 July 2023 at 08:51:41 GMT+2 > To: Tathagata Ghosh <ghoshtatha(a)gmail.com>, Tarak Nath Maity <tarak.maity.physics(a)gmail.com> > Cc: Terada Takahiro <takahiro.terada.hepc(a)gmail.com>, Graham White <G.A.White(a)soton.ac.uk>, Debika Chowdhury <debika.chowdhury(a)swansea.ac.uk>, juan.urrutia(a)kbfi.ee, Marek Lewicki <marek.lewicki(a)fuw.edu.pl>, Soubhik Kumar <soubhik(a)berkeley.edu> > > Dear all, > > Gentle reminder for today's workshop on Gravitational Waves at PTA. > > Zoom link is now available on the website: > https://sites.google.com/view/nanograv-epta-workshop-july-23/home <https://sites.google.com/view/nanograv-epta-workshop-july-23/home> > > > - - See you all today at 14.00 CEST / 17.30 IST time. > > > Thanks > Anish > > > On Wed, 12 Jul 2023 at 05:00, Anish Ghoshal <anishghoshal1(a)gmail.com <mailto:anishghoshal1@gmail.com>> wrote: > Dear all, > > In light of the excitement regarding the first evidence of stochastic gravitational background (SGWB) detection in Pulsar Timing Array (PTA) experiments, we are organizing an online workshop on this topics: Ideas on first evidence on Stochastic GW from PTA > https://sites.google.com/view/nanograv-epta-workshop-july-23/home <https://sites.google.com/view/nanograv-epta-workshop-july-23/home> > > On July 14 (Friday) we will start at 2 pm CEST/5.30 pm IST with Andrea Mitigate (DESY) introducing PTA and supermassive black hole binary (SMBHB) mergers (~ 1 hour), and then we will pass on to a series of small talks (~ 20m each) about possible cosmological and astrophysical explanations of the detection. Finally we will end with a panel discussion session discussing some of the raised and open questions on the topics. > > In particular, we are extremely happy to have Takahiro Terada, Marek Lewicki, Juan Urrutia, Graham White, Debika Chowdhury, and Soubhik Kumar. > > Friday, 14th of July > > 2pm CEST/5.30 pm IST Andrea Mitigate, Nano-Hz gravitational waves in PTA > > > From 3pm CEST/6.30 pm IST on the same day > > 1)Takahiro Terada (IBS, Daejeon), > The detected Stochastic Gravitational Waves and sub-solar Primordial Black Holes > > 2) Marek Lewicki (University of Warsaw), > Cosmic Superstrings Revisited in Light of NANOGrav 15-Year Data > > 3) Juan Urrutia (NICPB, Talinn), > Gravitational Waves from SMBH binaries in Light of the NANOGrav 15-Year Data > > 4) Graham White (University of Southampton), > Did we hear the sound of the Universe boiling ? > > 5) Debika Chowdhury (University of Swansea, UK) > Dark Energy, D branes and Pulsar Timing Arrays > > 6) Soubhik Kumar (UK Berkeley) Gravitational Waves from Stochastic Scalar Fluctuations > > 7) Panel Discussion > > Zoom link will be available on the website on Friday. > > You are welcome to participate in the online workshop. > Kindly circulate the notification to all who may be interested in joining the workshop online in your institute. > > Thanks > On behalf of the organizers > > Tathagata Ghosh (HRI, India) > Anish Ghoshal (University of Warsaw, Poland) > Tarak Maity (HRI, India) > > > -- > Dr. Anish Ghoshal > Adjunct Researcher > Institute of Theoretical Physics > University of Warsaw > Poland > > Profile: https://inspirehep.net/authors/1422123 <https://inspirehep.net/authors/1422123> > Website: https://sites.google.com/view/joint-seminars-salerno-kolkata/home <https://sites.google.com/view/joint-seminars-salerno-kolkata/home>

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