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Matěj Vaculčiak13/09/2023, 16:30
Practical information on the workshop, recent achievemts of the group and goals of the worshop are presented.
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Jesus Guillermo Contreras13/09/2023, 16:45
A brief summary is given of the composition of the group and the general research topics that it covers. The spirit and goals of the meeting as well as its evolution in the last few years are presented.
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Marek Matas (České vysoké učení technické v Praze)13/09/2023, 17:00
Phonons are the quasi-particles representing lattice vibrations of condensed matter. Why is it convenient to talk about vibrational quanta as particles? And why do we want to study them anyway? Phonons are some of the most promising low-energy excitations (O(meV)) that can be used in the detectors of tomorrow for capturing the feeblest interactions that lurk beyond the boundaries of the...
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Jesus Guillermo Contreras13/09/2023, 17:30
Writing papers is one of the fundamental activities of any scientist. In this talk, a few basic concepts on writing papers are provided. The general components and potential structure of scientific papers are presented. The different typical journals and their style as well as restrictions on length, number of figures and so on are discussed. Particulars of some published papers are shown.
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Diana Krupová14/09/2023, 09:00
The MFT is a silicon tracking detector consisting of 10 layers of ALPIDE silicon sensors using CMOS technology. It extends the ALICE physics program by adding vertexing capabilities at forward rapidities and provides valuable track information thanks to its position in front of the absorber of the Muon Spectrometer. This talk will provide an overview of detector performance in 2022 and 2023...
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Solangel Torres Rojas14/09/2023, 09:20
The Forward Diffractive Detector (FDD) is a sub-detector of the Fast Interaction Trigger (FIT) of the ALICE experiment consisting of two scintillator arrays installed, each array on one side with respect to the ALICE interaction point (IP) at very forward rapidity, at around 20 meters from the IP. The FDD has been running since 2022, collecting data from pp collision and is being tuned to run...
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Vojtěch Zabloudil14/09/2023, 09:40
Plastic scintillators are widely used in high-energy physics for particle detection. One example is the Forward Diffractive Detector (FDD), a sub-system of the newly-added trigger detector Fast Interaction Trigger (FIT), which was incorporated to the ALICE apparatus during a major upgrade for Runs 3 and 4. In order to fulfil the increasing requirements on future scintillators such as ultrafast...
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Timea Szollosova14/09/2023, 10:00
ALPIDE3 are monolithic silicon sensors under development within the upgrade program of the ALICE ITS (ITS3). During upcoming irradiation tests during fall 2023, the effects of Single Event Upset and Latch-ups are to be observed. SEUs are events of bit-flip in memory caused by energy deposited by radiation and latch-ups manifest by sudden increased power consumption. This talk will overview the...
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Solangel Torres Rojas, Vojtěch Zabloudil14/09/2023, 10:40
The silicon photomultipliers are becoming a very commonly used sensor devised to measure very low levels of light (in the order of single photons) from scintillator materials, Cherenkov radiators and other light sources. Good calibration of these devices is a very useful test to adjust a proper voltage level to work in a specific experiment.
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In this hands-on session, the participants will... -
Alexandra Ridziková14/09/2023, 14:00
The Hot-spot model, based on color dipole approach, provides a description of the proton structure in the transverse plane by hot spots. Hot spots are localized regions of higher partonic densities, whose positions change event-by-event. The number of hot spots increases with decreasing Bjorken-x. Moreover, the effects of making the radius of the proton and radius of hot spots energy dependent...
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Matěj Vaculčiak14/09/2023, 14:20
The structure of hadrons is a complex open question in modern physics. The inner working of quantum chromodynamics allows for a dynamical evolution of the structure and a fast growth of the densities of hadron constituents with respect to their fractional momentum. At some point, this unlimited growth needs to be curbed and saturation is expected to occur. The Balitsky-Kovchegov (BK) equation...
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Jesus Guillermo Contreras14/09/2023, 14:40
One of the main motivations of the meeting is to share the different techniques that one member of the team uses so that the rest of the team can profit from this knowledge. A case in point is the estimation of model parameters using data that has correlated uncertainties. A method based on Lagrange multipliers, used by the H1 and ALICE Collaboration, is presented. An example of its...
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Dagmar Bendová (CTU FNSPE)14/09/2023, 15:00
Prepare to delve into the fascinating intersection of particle physics and machine learning. Our mission is to demystify the intricate landscape of decision trees while maintaining a conversational and accessible tone. We'll navigate beyond theory, delving into the practical implications of decision trees. These powerful algorithms play a central role in deciphering complex datasets by...
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Karla Žertová14/09/2023, 15:40
Strong interaction between quarks and gluons in the standard model is described by Quantum Chromodynamics (QCD). The investigation of the phase diagram of QCD has been an active subject for many years. Especially, this research focuses on the transition between hadrons at low temperatures and the quark-gluon plasma (QGP) at high temperatures. For the study of the quark-gluon plasma, hard...
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Ekaterina Eremenko (CTU FNSPE)14/09/2023, 16:00
An enhancement of the baryon-to-meson ratio has been observed for the inclusive production of light-flavour particles at intermediate transverse momenta (2 GeV/c < pT < 6 GeV/c) in heavy-ion collisions when compared to the ratio measured in proton-proton (pp) collisions at both RHIC and LHC collision energies. This enhancement is commonly attributed to parton coalescence and recombination in a...
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Helena Hesounová14/09/2023, 16:20
During the Long Shutdown 2, ALICE group developed a new analysis software capable to handle data from the newly designed detectors with continuous readout. The whole structure of an analysis software had to be changed to fit the requirements of the Run 3. The presentation is focused on the structure of O2 and the multiplicity analysis of Pb-Pb Run3 data.
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Jan Čepila (CTU FNSPE)14/09/2023, 16:40
Models for deuteron, light nuclei, distorted nuclei and heavy nuclei are presented using potentials suggested by Woods-Saxon and the fitting of analytic functions to the resulting thickness functions.
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Michal Broz (České vysoké učení technické v Praze)15/09/2023, 09:00
Quantum tomography is a method to experimentally extract all that is observable about
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a quantum mechanical system. The tomographic method bypasses much of the
field-theoretic formalism to concentrate on what can be observed with experimental data, and how
to characterize the data. The method of quantum tomography uses a known “probe” to explore an unknown system. Data
is related directly... -
Sára Haidlová15/09/2023, 09:20
Probing of hadron structure and their properties is of great interest in studies of heavy-ion physics. One of the tools for said study is analysis of exclusive photoproduction of J/psi in ultra-peripheral collisions. Presented analysis shows a new perspective on studies of heavy-ion collisions using quantum tomography, a procedure independent of models focusing solely on measured observables....
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Jesus Guillermo Contreras15/09/2023, 09:40
Interference effects on the diffractive coherent photoproduction of the rho0 vector meson are studied at midrapidity with the ALICE detector. Interference comes about because there are two potential photon sources in Pb+Pb ultraperipheral collisions. The interference effects are expected to be more important at midrapidity, where both amplitudes are similar and at small impact parameters. In...
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Jakub Juračka (FNSPE CTU)15/09/2023, 10:00
Ultra-peripheral collisions present an opportunity to study long-range interactions between heavy ions. A frequently studied process is vector meson photoproduction, which gives insight into low-$x$ phenomena such as gluon shadowing or saturation. Collisions of a new ion species would improve our understanding of the nucleon number dependence of photoproduction cross sections. A short LHC...
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David Grund15/09/2023, 10:40
The structure of hadrons when probed at high energies, corresponding to small values of Bjorken-$x$, is an open problem. This talk will present the first measurement of the dependence of the incoherent photoproduction of J/$\psi$ off a lead ion on Mandelstam-$t$. The measurement was performed with the ALICE detector at midrapidity, $|y| < 0.8$, and the cross section was evaluated in five...
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Vendulka Fílová15/09/2023, 11:00
The structure of nucleons is one of the most important topics for a complete physical description of the fundamental nature of matter. Measurements of deep-inelastic scattering (DIS) carried out at HERA provide an outstanding set of results concerning the structure of protons. The results show that the density of gluons rise steeply for low Bjorken-$x$ values. The number of gluons grows with...
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Roman Lavička (CTU FNSPE)15/09/2023, 11:20
The ALICE Collaboration is divided into several working groups. The group, which is focusing on physics analysis of the UPC events, is called PAG-UPC and is successfully investigating the ALICE data for over a decade. In this talk, the current plans of the group for the analyses of the newest Run 3 data will be introduced.
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