- Seminars-iihe - listserv.vub.be

IIHE Seminar Jun 7: Prof. Dr. Matthias Schott (Precision Measurement of the Strong Coupling Constant with Z Boson Kinematics)
by Steven Lowette 07 Jun '24

07 Jun '24

Dear all, On Friday Jun 7 we will have an IIHE seminar from Prof. Dr. Matthias Schott: "Precision Measurement of the Strong Coupling Constant with Z Boson Kinematics" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1925/ Have a nice weekend! Steven. ----- Abstract: The strong coupling constant, alphaS, is one of the fundamental parameters of the Standard Model (SM) of particle physics and describes the strength of the strong interaction. It determines how strongly quarks and gluons as building blocks of protons and neutrons interact with each other. More concretely, alphaS, is one of the three coupling constants within the SM and therefore plays a fundamental role in our ability to describe the universe. The precision measurement of alphaS, is notorious difficult and most experimental measurements yield relative uncertainties of several percent. In recent years, we developed a fundamentally new approach to measure the strong coupling constant using the kinematic properties of Z bosons produced in proton-proton collisions, yielding a relative uncertainty of 0.8% and being the most precise measurement to date. Our approach of this measurement lies in the study of the Z boson kinematics in proton-proton collisions. Using the Z boson for this purpose provides three huge advantages: First of all, its kinematics in proton-proton collisions show a significant dependence on the strong coupling constant; secondly, the kinematics can be precisely predicted and thirdly, once the Z boson is created and decayed in electrons or muons, it does not experience any further effects from the strong interaction. In this talk, we summarize the basic concepts of this measurement. Bio: https://mschott.web.cern.ch/mschott/ -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar May 31: Dr. Isabelle De Bruyn (The CMS Cathode Strip Chamber Upgrade for HL-LHC)
by Steven Lowette 31 May '24

31 May '24

Dear all, On Friday May 31 we will have an IIHE seminar from Dr. Isabelle De Bruyn: "The CMS Cathode Strip Chamber Upgrade for HL-LHC" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1924/ Kind regards, Steven. ----- Abstract: The CMS muon system consists of 4 different types of muon chambers: drift tubes (DTs), cathode strip chambers (CSCs), resistive plate chambers (RPCs), and gas electron multipliers (GEMs). After an introduction to the CMS muon system, the functioning of the CSCs will be described. The performed upgrade of the CSC electronics during long shutdown 2 will be covered, as well as the remaining upgrade, in view of the HL-LHC. Bio: Isabelle graduated in Physics from Ghent University in Belgium and completed her Master thesis in a research group working with the CMS experiment. During her PhD (obtained in 2018) she continued her involvement with the CMS experiment at the VUB in Brussels and worked on a dark matter search using trackless jets. She then moved to CERN and started working for the University of Wisconsin, Madison, USA. She supervised students working on data analysis, but mostly worked on the Cathode Strip Chamber (CSC) upgrade and operation. More recently, she also took up the role of Muon Upgrade Coordinator and was responsible for the operation of the CSCs. -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar May 17: Barbara Clerbaux (Experimental review of highlights at this year's Moriond conference)
by Steven Lowette 17 May '24

17 May '24

Dear all, On Friday May 17 we will have an IIHE seminar from our own Barbara Clerbaux: "Experimental review of highlights at this year's Moriond conference" at 14h30 in the Sacton seminar room (G.1.03). The event's agenda can be found here: https://indico.iihe.ac.be/event/1922/ Kind regards, Steven. -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar May 3: Dr. Cecile Caillol (Observation of the photon-induced production of tau leptons in pp collisions at CMS and constraints on tau g-2)
by Steven Lowette 03 May '24

03 May '24

Dear all, On Friday May 3 we will have an IIHE seminar from Dr. Cecile Caillol: "Observation of the photon-induced production of tau leptons in pp collisions at CMS and constraints on tau g-2" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1922/ Kind regards, Steven. ----- Abstract: The photon-induced production of a pair of tau leptons had been observed in proton-proton collisions with data collected in Run-2 by the CMS detector at the CERN LHC. Signal events are identified thanks to their low track multiplicity around the di-tau vertex. These events are used to set constraints on the anomalous magnetic moment of the tau lepton, significantly improving previous measurements from the LEP era Bio: Dr. Cecile Caillol did her PhD at the Universite Libre de Bruxelles (Belgium) and graduated in 2016. She then joined the University of Wisconsin-Madison until July 2021, when she became an LD staff researcher at CERN. During her PhD and after, she worked on Higgs boson decays to tau leptons, including the first observation of H->tautau decays with 2016 data, and other Higgs boson measurements with tau leptons. She also played a leading role in several exotic Higgs searches. More recently, she has worked on the study of photon-induced processes (this seminar), and the lepton-induced production of leptoquarks. She is currently convener of one of the 3 search groups of CMS (SUS ˜= supersymmetry, dark matter, exotic Higgs). -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar Apr 12: dr. Elise Wursten (Experiments at the antimatter factory of CERN)
by Steven Lowette 12 Apr '24

12 Apr '24

Dear all, On Friday April 12 we will have an IIHE seminar from Dr. Elisa Wursten: "Experiments at the antimatter factory of CERN" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1920/ Kind regards, Steven. ----- Abstract: The Standard Model of Particle Physics is an extremely powerful model, but it is known to be incomplete. One of its issues is that it does not provide an explanation for the striking imbalance of matter over antimatter observed in our Universe. To better understand the properties of antimatter, the Antiproton Decelerator was inaugurated at CERN in 2000, providing a facility for dedicated studies of low-energy antiprotons and antihydrogen. Since then, an impressive amount of progress has been made, ranging from the efficient production, trapping and laser cooling of antihydrogen to extremely precise spectroscopic measurements and studies of its gravitational behaviour. In this seminar, I will give an overview of the experiments at the antimatter factory of CERN, concisely summarizing their research objectives, their measurements concepts and highlighting the most important results and plans for the future. Bio: Dr. Elise Wursten did her PhD at KULeuven, contributing to the neutron Electric Dipole Moment experiment (nEDM) at the Paul Scherrer Institute in Switzerland, under supeervision of Prof. Nathal Severijns. Interleaved with short periods as Visiting Scientist Fellow of the Max Planck Society, she was from 2018-2020 a CERN Senior Research Fellow and Visiting Scientist at the Ulmer Fundamental Symmetries Laboratory of RIKEN, Japan, working at the Baryon Antibaryon Symmetry Experiment (BASE) at the Antiproton Decelerator of CERN, Switzerland. Since 2021, she is a Special Postdoctoral Researcher affiliated to the Ulmer Fundamental Symmetries Laboratory of RIKEN, Japan, working again at the BASE experiment at CERN. -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar Apr 5: Prof. Domenico Della Volpe (Opening the PeV era in gamma ray astronomy - LHAASO highlight)
by Steven Lowette 05 Apr '24

05 Apr '24

Dear all, On Friday April 5 we will have an IIHE seminar from Prof. Domenico Della Volpe: "Opening the PeV era in gamma ray astronomy - LHAASO highlight" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1921/ Kind regards, Steven. ----- Abstract: LHAASO has started taking data in 2021 with its full array. With its large field of view and good performance, it has collected a huge amount of high quality data. In this of talk we will illustrate the LHAASO instruments and its performances. Later we will go over major achievements and breakthrough results. In the end, we will also give an outlook at the evolution of the array and LHAASO synergies with future instruments. Bio: Professor Della Volpe currently holds a position as a professor at the University of Geneva, where he contributes significantly to the astroparticle pillar of the department. Additionally, he is actively engaged in medical physics through his leadership role in the POSICS project, which aims to develop an innovative portable gamma/beta camera, generously funded by the EU H2020 program. His primary focus lies within the Cherenkov Telescope Array Observatory (CTAO), with a particular emphasis on the Large Size Telescope (LST) collaboration, where he holds the pivotal role of System Lead Engineer. His significant contribution played a crucial role in the success of the Critical Design Review (CDR) of the LST, a milestone achievement that marked it as the first telescope to meet the stringent qualifications for acceptance into the CTAO. His engagement with LHAASO began in 2017 through a collaboration on the WFCTA Camera, where his group supplied the technology for the focal plane. This contribution was notably acknowledged by LHAASO, particularly noteworthy as his group was the sole non-Chinese participant in the experiment and a member of the Institutional Board, underscoring the significance of their involvement. From 2018 to 2023, Professor Della Volpe chaired the publication committee of LHAASO and served as the main editor of the LHAASO science book. He has also made significant contributions as a contributing author to seminal papers published in prestigious journals such as Nature and Science. His main activity is in CTAO, and in particular in the Large Size telescope collaboration, where he is the System Lead engineer. In the end 2023, he left LHAASO to focus on new projects. He is one of the PI of the QUASAR project, aimed at pushing the boundaries of Intensity Interferometry to achieve micro arc-second resolution using picosecond light detectors. Additionally, he is collaborating on the French-Swiss initiative known as LACTEL, which seeks to implement a pioneering concept of a water Cherenkov detector in Lake Geneva, garnering significant interest from the scientific community, including the South West Galactic Observatory (SWGO). -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar Mar 29: Prof. Charlotte Van Hulse (Study of hadron structure in ultra-peripheral collisions at the LHC)
by Steven Lowette 29 Mar '24

29 Mar '24

Dear all, On Friday Mar 29 we will have an IIHE seminar from Prof. Charlotte Van Hulse: "Study of hadron structure in ultra-peripheral collisions at the LHC" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1919/ (note that via the top-left you can link the seminar agendas into your agenda, so you never miss one!) Kind regards, Steven. ----- Abstract: The study of exclusive processes in lepton-hadron interactions and in ultra-peripheral hadron-hadron collisions provides information on the three-dimensional distribution of quarks and gluons as a function of their longitudinal momentum and transverse position inside the hadron. Here, the longitudinal direction corresponds to the direction of the probe used to investigate the hadron. An introduction will be given as to how exclusive processes in ultra-peripheral hadron-hadron collisions provide access to the internal structure of the nucleon, and relevant experimental results will be discussed. Where applicable, parallels with measurements in lepton-hadron interactions will be highlighted. Bio: Charlotte Van Hulse is a professor at the University of Alcala in Spain. She did her PhD at Ghent University, where she studied exclusive and semi-inclusive QCD processes in lepton-hadron collisions at the HERMES experiment, at DESY, Hamburg. Subsequently she studied hadron formation in e+e- collisions, at the Belle experiment in Japan, and performed studies for a fixed target at ALICE. Nowadays she focuses on QCD (exclusive and semi-inclusive processes) at the LHCb experiment as well as feasibility/R&D studies for the future electron-ion collider at BNL, USA. -- Steven Lowette https://cern.ch/lowette/

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Re: IIHE Seminar Mar 22: Dr. James Howarth (Exploring quantum entanglement at hadron colliders using top quarks at the ATLAS experiment)
by Steven Lowette 22 Mar '24

22 Mar '24

Hello everyone! Last reminder for the seminar, see you at 2.30! Cheers, Steven. On Mar 19, 2024 10:07, Steven Lowette <Steven.Lowette(a)cern.ch> wrote: Hello everyone, This is a reminder that you have the IIHE seminar this Friday on top entanglement in your agenda. See you there numerously, Steven. On 26/02/2024 14:28, Steven Lowette wrote: > Dear all, > > On Friday Mar 22 we will have an IIHE seminar from Dr. James Howarth: > "Exploring quantum entanglement at hadron colliders using top quarks at > the ATLAS experiment" > at 14h30 in the Sacton seminar room (G.1.03) > > Abstract and short bio are below; the event's agenda can be found here: > https://indico.iihe.ac.be/event/1918/ > > Kind regards, > Steven. > > ----- > > Abstract: > ATLAS recently observed quantum entanglement in pairs of top quarks > using 13 TeV data, the first time that entanglement has been observed in > fundamental quarks and at the highest ever energy scales. In this > seminar I will explain how this ground breaking measurement was > achieved, how it highlights limitations in our current state-of-the-art > Monte Carlo simulations, and the implications of the result in the wider > context of quantum information. I will also explain what direction this > exciting new field of study at collider experiments might take and > highlight new opportunities for collaborations between quantum > information and collider physics. > > Bio: > Dr James (Jay) Howarth is a Lecturer at the University of Glasgow and > Royal Society University Research Fellow. He obtained his PhD at the > University of Manchester in 2013, followed by a research fellowship at > DESY and a postdoctoral research position at the University of > Manchester. His research focuses on top quark physics in general, > particularly on the properties of top quarks at hadron colliders and is > a member of the ATLAS collaboration. > > -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar Mar 22: Dr. James Howarth (Exploring quantum entanglement at hadron colliders using top quarks at the ATLAS experiment)
by Steven Lowette 19 Mar '24

19 Mar '24

Dear all, On Friday Mar 22 we will have an IIHE seminar from Dr. James Howarth: "Exploring quantum entanglement at hadron colliders using top quarks at the ATLAS experiment" at 14h30 in the Sacton seminar room (G.1.03) Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1918/ Kind regards, Steven. ----- Abstract: ATLAS recently observed quantum entanglement in pairs of top quarks using 13 TeV data, the first time that entanglement has been observed in fundamental quarks and at the highest ever energy scales. In this seminar I will explain how this ground breaking measurement was achieved, how it highlights limitations in our current state-of-the-art Monte Carlo simulations, and the implications of the result in the wider context of quantum information. I will also explain what direction this exciting new field of study at collider experiments might take and highlight new opportunities for collaborations between quantum information and collider physics. Bio: Dr James (Jay) Howarth is a Lecturer at the University of Glasgow and Royal Society University Research Fellow. He obtained his PhD at the University of Manchester in 2013, followed by a research fellowship at DESY and a postdoctoral research position at the University of Manchester. His research focuses on top quark physics in general, particularly on the properties of top quarks at hadron colliders and is a member of the ATLAS collaboration. -- Steven Lowette https://cern.ch/lowette/

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IIHE Seminar Mar 7: Dr. Richard Ruiz (Vector Boson Scattering: Status and Prospects for the Large Hadron Collider and Beyond)
by Steven Lowette 07 Mar '24

07 Mar '24

Dear all, On Thursday Mar 7 we will have an IIHE seminar from Dr. Richard Ruiz: "Vector Boson Scattering: Status and Prospects for the Large Hadron Collider and Beyond" at 15h00 in the Sacton seminar room (G.1.03) Note the *unusual day and time* to accommodate the speaker's travel constraints. Abstract and short bio are below; the event's agenda can be found here: https://indico.iihe.ac.be/event/1917/ Kind regards, Steven. ----- Abstract: The scattering of electroweak bosons at TeV-scale super colliders is a powerful mechanism that probes spin and charge configurations inaccessible to quark and gluon scattering. Electroweak vector boson scattering (VBS) processes therefore give unique insights into the Standard Model's gauge and Higgs sectors, as well as into models of new physics. In this talk, we review experimental results and ongoing theoretical developments of VBS at the Large Hadron Collider, its high luminosity upgrade, and its potential successors. Short Bio: Richard Ruiz is a specialist in collider physics, and particularly searches for violations of lepton symmetries using electroweak boson scattering as a probe of new physics at the Large Hadron Collider. After earning his PhD at the University of Pittsburgh in 2015 on the topic "hadron collider tests of neutrino mass models", Richard moved to Durham University's Institute for Particle Physics Phenomenology in the UK. In 2018, he moved to the Universite Catholique de Louvain's Center for Cosmology and Particle Physics Phenomenology and finally joined the Institute for Nuclear Physics Polish Academy of Science (IFJ PAN) in Krakow, in 2020. He is credited in his habilitation with "influential theoretical contributions to understanding and using vector boson scattering as a probe of new physics at the LHC, its high-luminosity upgrade, and future high-energy collider experiments," which is the topic of the talk. Despite being a theorist investigating fundamental aspects of collider theory, Richard is heavily involved in experimental activities at CERN due to his work on developing user-friendly simulation tools. -- Steven Lowette https://cern.ch/lowette/

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2025

2024

2023