We would like to thank all eleven contributors who prepared posters and gave excellent oral presentations of them during a special, open session. Three of the posters were awarded (we had 29 responses). Below we have assigned awarded posters. We would like to point out that the competition was strong, and each poster got some votes.
Among the accepted posters (max. 12), the three best posters will be selected and awarded during the symposium.
The presentation of the posters will start with an hour-long session during which the authors will have 5-minutes presentations. Then, the discussion will begin, where authors will have the opportunity to answer the participants' questions in front of the posters.
The list of accepted posters.
1. Biswajit Karmakar (UŚ) “Discrete Flavor Symmetries and Lepton Masses and Mixings”
Abstract: We discuss neutrino mass and mixing models based on discrete flavor symmetries. These models can include a variety of new interactions and non-standard particles such as sterile neutrinos, scalar Higgs singlets and multiplets. We point at connections of the models with leptogenesis and dark matter and the ways to detect the corresponding non-standard particles at intensity and energy frontier experiments.
2. Marianna Głażewska (UW) “PS Module Testing for the Phase-II CMS Outer Tracker Upgrade”
Abstract (Link): MGlazewska_Abstract.pdf
1st place
3. Hiren Kakkad (AGH) “Towards developing quantum correction to a new Wilson-line based action for Gluodynamics”
Abstract: We discuss a new classical action that gives the gluonic tree amplitudes, but does not contain any triple point vertices. This new formulation is obtained via a canonical transformation of the light-cone Yang-Mills action, with the field transformations based on Wilson line functionals. In addition to MHV (Maximally Helicity Violating) vertices, the action contains also N^kMHV vertices, where 1≤k≤n−4, and n is the number of external legs. We computed tree-level amplitudes up to 8 gluons and found agreement with standard results. In order to systematically develop quantum corrections to this new action, we first study the one loop effective action for the MHV action, where we were able to demonstrate that there are no missing contributions when treating the quantum corrections this way. The presentation is based on https://arxiv.org/abs/2208.11000 and https://doi.org/10.1007/JHEP07(2021)187.
2nd place
4. Pragati Patel (IFJ) "ATLAS Roman Pots at LHC Run 3 - Detector Status"
Abstract: ALFA and AFP detectors are being prepared to take data during the LHC Run 3. ALFA underwent refurbishment whereas AFP, among other upgrades, was equipped with a new solution for the Time-of-Flight system, the so-called Out-of-Vacuum solution. AFP Silicon Tracker is equipped with new modules and ToF, after various test beams, seems to achieve desired resolution with high efficiency. As a part of the 2022 13.6 TeV data was already taken, the AFP detector performance during Run 3 will be briefly discussed.
5. Piotr Korcyl (UJ) “Challenges of the collinearly improved JIMWLK evolution equation”
Abstract: “I briefly describe the framework for solving the BK and JIMWLK evolution equations including the kinematical constraint. The introduced kinematic ordering of emitted gluons along the evolution corresponds to the resummation of enhanced subleading corrections. It is expected to provide important contributions to several observables including azimuthal correlations in dijet events. The numerical implementation is based on the Langevin reformulation of the JIMWLK equation and uses an interplay between linear and logarithmic lattices as well as incorporates both the BK and JIMWLK equations simultaneously.”
6. Rafał Staszewski (IFJ PAN) “Probing QCD asymptotia with elastic pp scattering”
Abstract: Elastic scattering is kinematically the simplest proton-proton interaction. However, its dynamics is rather complex, with contributions of several different physical mechanisms. The quantum nature of the interactions relates, via the optical theorem, the elastic scattering amplitude to the cross section of all hadronic processes that take place in proton-proton collisions, including the inelastic ones. In addition, dispersion relations provide a connection to proton interactions at other energies, including those not yet accessible in laboratory conditions.
Recently, ATLAS studied elastic pp scattering at the centre-of-mass energy of 13 TeV and measured the value of the ratio of the real to the imaginary parts of the forward scattering amplitude (the rho parameter) and the total pp cross section. The poster will introduce the ALFA detector system used in the measurement and describe the key elements of the experimental method. The conclusions of the measurement for our present understanding of high-energy QCD -- the existence of the odderon exchange and the energy evolution of the total cross section -- will be presented.
[1] arXiv:2207.12246 (submitted to EPJC)
[2] https://atlas.cern/Updates/Physics-Briefing/ALFA-scattering
7. Marta Urbaniak (UŚ) "Development of New Beam Position Detectors for the NA61/SHINE experiment"
Abstract: NA61/SHINE is a fixed-target experiment located at CERN Super Proton Synchrotron. The open charm measurements required upgrades of the NA61/SHINE detector system, and the development of new beam position detectors is part of the upgrade. Two types of detectors have been manufactured and tested. The first one is a scintillating fibers detector with photomultiplier as a readout. The scintillating fibers detector consists of two ribbons, which are arranged perpendicularly to each other. Each ribbon is made of two layers of 250 µm diameter fibers. The grouping method was used, which allows using of a single multichannel photomultiplier for one detector. The second type of detector is based on the single-sided silicon strip detector (SSD). In this project, Si strips produced by Hamamatsu (S13804) were used, where the pitch has a width equal to 190 um. The developed detectors must meet several requirements: should work efficiently with proton and lead beams with beam intensity on the level of 100 kHz, the detector’s material on the beamline should be minimized, the detectors should be able to determine the position of X and Y hit of each beam particle with maximum possible a
curacy. During my poster presentation, I will present the results of our work.
8. Yuliia Balkova (UŚ) “Strangeness production in the NA61/SHINE experiment at the CERN SPS energy range”
Abstract: NA61/SHINE is a multi-purpose fixed-target experiment located at the CERN Super Proton Synchrotron. One of the main goals of the experiment is to study the phase transition between the hadronic gas and quark-gluon plasma and search for the critical point of the strongly interacting matter. To study the phase diagram of strongly interacting matter, the NA61/SHINE experiment performed the two-dimensional scan in collision energy and system size. In turn, strangeness production is a well-known valuable probe for understanding particle production in high energy physics because of the absence of the strange valence quarks in the initial state of the collision. The poster will emphasize the importance of measuring the strangeness production for the discussion concerning the onset of deconfinement and present the general strategy of the analysis.
3rd place
9. Michał Iglicki (UW) “t-channel singularity in studies of the early Universe: the problem and its solution”
Abstract: If the mediator of a given t-channel process is allowed to be on-shell, the thermaly averaged cross section (used to determine evolution of particles, densities in the early Universe) can become infinite due to singularity of the matrix element. For a stable and massive mediator, neither well known IR-regularization methods nor inclusion of mediator's decay width can be used to cure the singularity. The issue seems to be not widely known among particle physicists, even though it affects processes present in the very Standard Model. The natural context of the t-channel singularity are, however, models of dark matter, providing massive stable particles that can potentially act as singular t-channel mediators. Within the thermal field theory it is possible to equip the mediator with an effective width that is a consequence of mediator's interactions with the surrounding gas of particles present in the early Universe. This leads to regularization of the discussed singularity. This work presents the proposed regularization method in the context of (1) a minimal scalar model and (2) a multicomponent vector-fermion model of dark matter.
10. Ferhat Öztürk (IFJ) “Interplane alignment of SiT detector in ATLAS Forward Proton detectors”
Abstract (Link): FÖztürk_Abstract.pdf
11. Shakeel Ur Rahaman (IIT Kanpur) “Comparing BSM scenarios using EFT”
Abstract: The Standard Model (SM) has been extensively verified and all of its prediction has been substantiated by the experiments. But still, some physical phenomena cannot be explained by it. For the more complete theory, a plethora of models has been predicted and all of them have their own merits. The concept that SM can be used as an effective theory here is widely held. We can add higher dimensional terms to its Lagrangian and trying to capture the footprint of the more complete UV theory, this is commonly known as the bottom-up approach. We have developed a tool named GrIP that builds higher dimensional operators of any mass dimension given information about the underlying symmetry. On the other hand, we can choose a complete UV theory, identify the heavy degrees of freedom, integrate them out and obtain operators of higher mass dimension, known as the top-down approach. Covariant Derivative Expansion (CDE) is one of the methodologies that integrate out heavy fields and generate the effective operator and their Wilson coefficient. The two most intriguing traits of CDE are, firstly, the method is manifestly gauge-invariant so the effective operators generated at the end are also gauge-invariant. Secondly, its applicability is universal. Encapsulating these features there is a formula dubbed as the universal one-loop effective action (UOLEA) which has algorithmic essence to it. The Mathematica based package CoDEx based on the UOLEA is one of the tools that can integrate out heavy particles from the tree as well as one-loop diagrams and generate effective operators of mass dimension-6. Explaining any deviation from the SM prediction incorporating effective operators has been a common practice nowadays but it is difficult to trace back the origin of those effective operators and connect them to some UV complete scenario. We have developed a diagrammatic approach based on symmetry arguments to address this problem.
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Old: The call is opened for posters. Please send the Abstract (until September 23) to sfof2022@us.edu.pl .
