April 2024 - Seminars-iihe - listserv.vub.be

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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