Seminar on Particle Physics Phenomenology and Experiments
from
Monday, 7 October 2024 (13:00)
to
Monday, 30 June 2025 (13:00)
Monday, 7 October 2024
13:00
Search for sources of CP violation with the ATLAS detector at the LHC
-
Leo Boudet
(LAPP-Annecy, France)
Search for sources of CP violation with the ATLAS detector at the LHC
Leo Boudet
(LAPP-Annecy, France)
13:00 - 14:00
Charge Parity violation is one of Sakharov's conditions, necessary to explain the asymmetry between matter and antimatter in the Universe. The Standard Model (SM) of particle physics, being the most successful theory of particle physics to date, does not provide sufficient sources of CP violation to explain the excess of matter measured. This is one of the arguments suggesting that the SM is valid only at the energies probed so far and should be completed by new physics manifesting at higher energies. The SM Effective Field Theory (SMEFT) provides a theoretical framework to constrain new physics parameters within the energy range reachable at LHC. This talks provides an overview of the results obtained by the ATLAS collaboration on CP violating SMEFT parameters in the bosonic sector and presents the strategies implemented in that goal.
Tuesday, 8 October 2024
Wednesday, 9 October 2024
Thursday, 10 October 2024
Friday, 11 October 2024
Saturday, 12 October 2024
Sunday, 13 October 2024
Monday, 14 October 2024
Tuesday, 15 October 2024
Wednesday, 16 October 2024
Thursday, 17 October 2024
Friday, 18 October 2024
Saturday, 19 October 2024
Sunday, 20 October 2024
Monday, 21 October 2024
13:00
Machine learning for polarization measurement in Vector Boson Scattering at the LHC
-
Mathis Dubau
(LAPP-Annecy, France)
Machine learning for polarization measurement in Vector Boson Scattering at the LHC
Mathis Dubau
(LAPP-Annecy, France)
13:00 - 14:00
Vector Boson Scattering (VBS) is a rare and complex process that occurs during high-energy proton-proton collisions at the Large Hadron Collider (LHC), observed with the ATLAS detector. Polarization, an intrinsic property related to the spin of the particles, can be observed by analyzing the characteristic of the decay products of the Vector Bosons. This plays a crucial role in better understanding the Higgs Mechanism, the longitudinal polarization is directly linked to the electroweak spontaneous symmetry breaking and arise from the mass obtained by the boson. This phenomenon is highly constrained by the Standard Model (SM), precise measurement could lead to hints of new physics beyond our current model. Machine Learning (ML), and particularly Deep Neural Networks (DNNs), enhance our ability to better handle the discrimination of this kind of process and the polarization states. The usage of high dimensional input parameters that cover various crucial aspects for the initial particles or their decay products help to probe the VBS process. Consequent Monte-Carlo generated samples are used to train those DNNs and are made to mimic the data produced at the LHC and collects by ATLAS. Those novel techniques were used to make observation of gauge boson joint-polarisation states in W^\pm Z production from pp collisions at \sqrt{s} = 13 TeV with the ATLAS detector and the very first observation of both a W and a Z boson simultaneously polarised longitudinally. This achievement also includes the measurement of joint helicity fractions and both the inclusive and differential cross sections with good agreement with the Standard Model predictions.
Tuesday, 22 October 2024
Wednesday, 23 October 2024
Thursday, 24 October 2024
Friday, 25 October 2024
Saturday, 26 October 2024
Sunday, 27 October 2024
Monday, 28 October 2024
Tuesday, 29 October 2024
Wednesday, 30 October 2024
Thursday, 31 October 2024
Friday, 1 November 2024
Saturday, 2 November 2024
Sunday, 3 November 2024
Monday, 4 November 2024
13:00
Non-invasive identification of substances with neutrons and lasers: status and prospects
-
Michał Silarski
(Jagiellonian University)
Non-invasive identification of substances with neutrons and lasers: status and prospects
Michał Silarski
(Jagiellonian University)
13:00 - 14:00
In an era of growing armed conflicts and the threat of terrorist attacks, the search for effective methods for detecting and neutralizing hazardous materials is becoming particularly important. They are important not only in the context of protecting the population but also the natural environment. The seminar will discuss methods for detecting explosives and other hazardous substances using neutrons and laser-induced plasma. They enable non-invasive and fast determination of the stoichiometry of the tested substance and are based on the use of neutrons interaction with matter and spectroscopy of gamma radiation generated as its result. This allows for determining not only the shape but also the stoichiometry of the tested objects. Using neutrons is a good alternative or complement to the techniques used so far, and its potential may be increased even more by subsequent application of Laser-Induced Breakdown Spectroscopy (LIBS).
Tuesday, 5 November 2024
Wednesday, 6 November 2024
Thursday, 7 November 2024
Friday, 8 November 2024
Saturday, 9 November 2024
Sunday, 10 November 2024
Monday, 11 November 2024
Tuesday, 12 November 2024
Wednesday, 13 November 2024
Thursday, 14 November 2024
Friday, 15 November 2024
Saturday, 16 November 2024
Sunday, 17 November 2024
Monday, 18 November 2024
Tuesday, 19 November 2024
Wednesday, 20 November 2024
Thursday, 21 November 2024
Friday, 22 November 2024
Saturday, 23 November 2024
Sunday, 24 November 2024
Monday, 25 November 2024
Tuesday, 26 November 2024
Wednesday, 27 November 2024
Thursday, 28 November 2024
Friday, 29 November 2024
Saturday, 30 November 2024
Sunday, 1 December 2024
Monday, 2 December 2024
Tuesday, 3 December 2024
Wednesday, 4 December 2024
Thursday, 5 December 2024
Friday, 6 December 2024
Saturday, 7 December 2024
Sunday, 8 December 2024
Monday, 9 December 2024
13:00
Search for the X17 QCD Axion in the η→π⁺π⁻e⁺e⁻ decay with the HADES Detector
-
Marcin Zieliński
(Jagiellonian University)
Search for the X17 QCD Axion in the η→π⁺π⁻e⁺e⁻ decay with the HADES Detector
Marcin Zieliński
(Jagiellonian University)
13:00 - 14:00
The High-Acceptance Di-Electron Spectrometer (HADES) operates at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, using pion, proton, and heavy-ion beams provided by the SIS-18 synchrotron. In February 2022, the HADES Collaboration measured proton-proton collisions at 4.5 GeV momentum using the upgraded setup as part of the FAIR-Phase0 program. One of the key objectives of the HADES physics program is to test the predictions of the Standard Model and search for potential hints of new phenomena beyond current theoretical frameworks (BSM – Beyond Standard Model Physics). In particular, by studying η meson decays into dilepton (e⁺e⁻) channels, we investigate the possible existence of the X17 boson, a candidate for an axion-like particle (ALP). In this scenario, an intermediate state of the η decay could involve the creation of a QCD axion through the sequence η → π⁺π⁻ X17 (→ e⁺e⁻). The X17 particle is hypothesized to be isoscalar or axial-vector gauge boson, which may mediate a fifth force with couplings to Standard Model particles. These studies are further motivated by recently observed anomalies in the invariant mass distribution of e⁺e⁻ pairs in isoscalar magnetic nuclear transitions of ⁸Be and ⁴He nuclei. These anomalies have been interpreted as evidence for the creation and decay of an intermediate particle, X17, with a mass of approximately 17 MeV/c² and suppressed mixing with the neutral pion. In this talk, we will discuss the general motivations for X17 studies, present our analysis methodology, and share preliminary results from data collected using the high-resolution HADES spectrometer.
Tuesday, 10 December 2024
Wednesday, 11 December 2024
Thursday, 12 December 2024
Friday, 13 December 2024
Saturday, 14 December 2024
Sunday, 15 December 2024
Monday, 16 December 2024
13:00
Magnetic and electric dipole moments of short-lived particles and proposal for their measurements with bent crystals at CERN
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Alexander Yu. Korchin
(Kharkiv Institute of Physics and Technology & V.N. Karazin Kharkiv National University, Ukraine)
Magnetic and electric dipole moments of short-lived particles and proposal for their measurements with bent crystals at CERN
Alexander Yu. Korchin
(Kharkiv Institute of Physics and Technology & V.N. Karazin Kharkiv National University, Ukraine)
13:00 - 14:00
We discuss theoretical basis for measurement of magnetic and electric dipole moments (MDM and EDM) of short-lived particles at the LHC by using bent crystals. In particular, measurement of these dipole moments for the charmed baryons Lambda_c and Xi_c would allow one to directly obtain information on MDM and EDM of the charm quark. This can be demonstrated in a constituent quark model. The idea of measurement of MDM/EDM is based on the phenomenon of spin precession of a channeling particle which moves in a strong electric field of a bent crystal. Theoretical formalism is briefly reviewed. Some elements of the proposal at CERN are also addressed.
Tuesday, 17 December 2024
Wednesday, 18 December 2024
Thursday, 19 December 2024
Friday, 20 December 2024
Saturday, 21 December 2024
Sunday, 22 December 2024
Monday, 23 December 2024
Tuesday, 24 December 2024
Wednesday, 25 December 2024
Thursday, 26 December 2024
Friday, 27 December 2024
Saturday, 28 December 2024
Sunday, 29 December 2024
Monday, 30 December 2024
Tuesday, 31 December 2024
Wednesday, 1 January 2025
Thursday, 2 January 2025
Friday, 3 January 2025
Saturday, 4 January 2025
Sunday, 5 January 2025
Monday, 6 January 2025
Tuesday, 7 January 2025
Wednesday, 8 January 2025
Thursday, 9 January 2025
Friday, 10 January 2025
Saturday, 11 January 2025
Sunday, 12 January 2025
Monday, 13 January 2025
13:00
μPPET: studying the Cosmic Rays Muon Puzzle by probing muons with J-PETs
-
Alessio Porcelli
(Jagiellonian University)
μPPET: studying the Cosmic Rays Muon Puzzle by probing muons with J-PETs
Alessio Porcelli
(Jagiellonian University)
13:00 - 14:00
The μPPET [mu(μ)on Probe with j-PET] project aims to investigate the "muon puzzle" from cosmic rays air showers. This puzzle is related to observing a much larger number of muons on the earth's surface than it results from current theoretical models. The investigated hypothesis relies on an observed effect in muon cross-section and trajectory due to projectile-target polarizations. The measurements require detailed information on muons at the ground, such as track and charge distributions. To measure them, the two PET machines developed at the Jagiellonian University in Poland (J PETs) are used due to their well-known resolution and advantageous location for detecting muons that reach long depths in the atmosphere. One is utilized as a muon tracker, and the second will be converted to an array for reconstructing the core of the atmospheric shower. In parallel, the existing hadronic interaction models will be modified to compare with the measurements and fine-tune them. In this seminar, we will introduce the Muon Puzzle problem, the hypothesis to fix it, and how μPPET will test it.
Tuesday, 14 January 2025
Wednesday, 15 January 2025
Thursday, 16 January 2025
Friday, 17 January 2025
Saturday, 18 January 2025
Sunday, 19 January 2025
Monday, 20 January 2025
Tuesday, 21 January 2025
Wednesday, 22 January 2025
Thursday, 23 January 2025
Friday, 24 January 2025
Saturday, 25 January 2025
Sunday, 26 January 2025
Monday, 27 January 2025
Tuesday, 28 January 2025
Wednesday, 29 January 2025
Thursday, 30 January 2025
Friday, 31 January 2025
Saturday, 1 February 2025
Sunday, 2 February 2025
Monday, 3 February 2025
Tuesday, 4 February 2025
Wednesday, 5 February 2025
Thursday, 6 February 2025
Friday, 7 February 2025
Saturday, 8 February 2025
Sunday, 9 February 2025
Monday, 10 February 2025
Tuesday, 11 February 2025
Wednesday, 12 February 2025
Thursday, 13 February 2025
Friday, 14 February 2025
Saturday, 15 February 2025
Sunday, 16 February 2025
Monday, 17 February 2025
Tuesday, 18 February 2025
Wednesday, 19 February 2025
Thursday, 20 February 2025
Friday, 21 February 2025
Saturday, 22 February 2025
Sunday, 23 February 2025
Monday, 24 February 2025
Tuesday, 25 February 2025
Wednesday, 26 February 2025
Thursday, 27 February 2025
Friday, 28 February 2025
Saturday, 1 March 2025
Sunday, 2 March 2025
Monday, 3 March 2025
Tuesday, 4 March 2025
Wednesday, 5 March 2025
Thursday, 6 March 2025
Friday, 7 March 2025
Saturday, 8 March 2025
Sunday, 9 March 2025
Monday, 10 March 2025
Tuesday, 11 March 2025
Wednesday, 12 March 2025
Thursday, 13 March 2025
Friday, 14 March 2025
Saturday, 15 March 2025
Sunday, 16 March 2025
Monday, 17 March 2025
Tuesday, 18 March 2025
Wednesday, 19 March 2025
Thursday, 20 March 2025
Friday, 21 March 2025
Saturday, 22 March 2025
Sunday, 23 March 2025
Monday, 24 March 2025
Tuesday, 25 March 2025
Wednesday, 26 March 2025
Thursday, 27 March 2025
Friday, 28 March 2025
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Sunday, 30 March 2025
Monday, 31 March 2025
Tuesday, 1 April 2025
Wednesday, 2 April 2025
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Thursday, 17 April 2025
Friday, 18 April 2025
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Sunday, 20 April 2025
Monday, 21 April 2025
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Wednesday, 23 April 2025
Thursday, 24 April 2025
Friday, 25 April 2025
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Monday, 28 April 2025
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Wednesday, 30 April 2025
Thursday, 1 May 2025
Friday, 2 May 2025
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Monday, 5 May 2025
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Wednesday, 7 May 2025
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Monday, 26 May 2025
Tuesday, 27 May 2025
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Sunday, 1 June 2025
Monday, 2 June 2025
Tuesday, 3 June 2025
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Thursday, 5 June 2025
Friday, 6 June 2025
Saturday, 7 June 2025
Sunday, 8 June 2025
Monday, 9 June 2025
Tuesday, 10 June 2025
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Friday, 13 June 2025
Saturday, 14 June 2025
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Monday, 16 June 2025
Tuesday, 17 June 2025
Wednesday, 18 June 2025
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Friday, 20 June 2025
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Monday, 23 June 2025
Tuesday, 24 June 2025
Wednesday, 25 June 2025
Thursday, 26 June 2025
Friday, 27 June 2025
Saturday, 28 June 2025
Sunday, 29 June 2025
Monday, 30 June 2025