Grad School Physics Seminar 2024/25
from
Saturday, 21 September 2024 (09:15)
to
Sunday, 15 June 2025 (18:00)
Monday, 16 September 2024
Tuesday, 17 September 2024
Wednesday, 18 September 2024
Thursday, 19 September 2024
Friday, 20 September 2024
Saturday, 21 September 2024
Sunday, 22 September 2024
Monday, 23 September 2024
Tuesday, 24 September 2024
Wednesday, 25 September 2024
Thursday, 26 September 2024
Friday, 27 September 2024
Saturday, 28 September 2024
Sunday, 29 September 2024
Monday, 30 September 2024
Tuesday, 1 October 2024
Wednesday, 2 October 2024
Thursday, 3 October 2024
09:15
Welcoming Talk of the Graduate School Director
-
Michał Spaliński
Welcoming Talk of the Graduate School Director
Michał Spaliński
09:15 - 09:35
Room: Room 207
09:35
Discussion about the goals and organization of the PhD seminar
-
Michal Bluj
(
NCBJ
)
Anna Durkalec
(
National Centre for Nuclear Research
)
Jakub Wagner
(
National Centre for Nuclear Research
)
Discussion about the goals and organization of the PhD seminar
Michal Bluj
(
NCBJ
)
Anna Durkalec
(
National Centre for Nuclear Research
)
Jakub Wagner
(
National Centre for Nuclear Research
)
09:35 - 09:55
Room: Room 207
Friday, 4 October 2024
Saturday, 5 October 2024
Sunday, 6 October 2024
Monday, 7 October 2024
Tuesday, 8 October 2024
Wednesday, 9 October 2024
Thursday, 10 October 2024
09:15
Multidimensional Random Walk for Calculating the Fusion/Fission Probabilities of Superheavy Elements
-
Aleksander Augustyn
(
NCBJ
)
Multidimensional Random Walk for Calculating the Fusion/Fission Probabilities of Superheavy Elements
Aleksander Augustyn
(
NCBJ
)
09:15 - 10:00
Room: Room 207
In our recent work [1], we introduced a novel approach, the Dipole-Driven Model (DDM), for characterizing the fusion process of two heavy ions within the entrance channel. The DDM utilizes the dipole variable as an authentic shape parameter to describe the configuration of the colliding heavy ions, with shape parametrization performed at the neck region. This allows for the optimization of the deformation space and the exploration of previously unattainable shapes. In this talk, a new method for predicting the probability of fusion of superheavy elements will be presented. The approach uses a random walk algorithm, in which the shape evolution is governed by the density of states above the multidimensional potential energy surface (PES). The PESs were calculated within the latest version of the Warsaw macroscopic-microscopic model [1], with rotational energy included. Three cold fusion reactions will be examined in detail: 48Ca+208Pb, 50Ti+208Pb and 54Cr+208Pb. The calculated probabilities of fusion for these reactions will be shown. The influence of angular momentum and excitation energy on ratios of symmetric and asymmetric divisions will be demonstrated. Future improvements to the method will also be discussed. [1] T. Cap, A. Augustyn, M. Kowal, and K. Siwek-Wilczyńska, Phys. Rev. C 109, L061603 (2024). [2] P. Jachimowicz, M. Kowal, and J. Skalski, At. Data. Nucl. Data. Tables. 138, 101393 (2021).
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
10:00
Cancelled
Cancelled
10:00 - 10:20
Room: Room 207
Friday, 18 October 2024
Saturday, 19 October 2024
Sunday, 20 October 2024
Monday, 21 October 2024
Tuesday, 22 October 2024
Wednesday, 23 October 2024
Thursday, 24 October 2024
09:15
Understanding the Vector Boson Scattering at the CMS experiment at CERN
-
Monika Ghimiray
Understanding the Vector Boson Scattering at the CMS experiment at CERN
Monika Ghimiray
09:15 - 10:00
Room: Room 207
In this seminar, I will present a study of Vector Boson Scattering (VBS) processes at the Compact Muon Solenoid (CMS) experiment at CERN, with a specific focus on the scattering of same-sign W bosons. The final state under investigation involves two leptons, two neutrinos and two tagging jets. My analysis will explore key VBS processes, detailing the challenges posed by various backgrounds and the strategies employed to mitigate their contributions. In particular, I will highlight the impact of non-prompt leptons, which represent one of the most significant backgrounds, and explain how these are addressed in our study. Additionally, I will share insights from the data analysis, including results related to the interpretation within the framework of the Standard Model Effective Field Theory (SMEFT).
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
09:15
Evolution of the ISM in quiescent galaxies
-
Krzysztof Lisiecki
(
NCBJ BP4
)
Evolution of the ISM in quiescent galaxies
Krzysztof Lisiecki
(
NCBJ BP4
)
09:15 - 10:15
Room: Room 207
Unveiling the routes galaxies take to quiescence is one of the most open challenges in galaxy evolution. While the most of studies focused on characterizing quiescent galaxies (QG) across cosmic time through their stellar properties using optical/near-infrared (NIR) data, the mid-infrared regime was only recently examined thanks to the advent of JWST. The need to understand the MIR emission in QGs has been emphasized due to recent discoveries of a peculiar population of quiescent, but dust-rich galaxies at high-redshitts (z>0.5-3). In this talk, I will present the preliminary results of a first study that investigated the quenching routes and the physical properties of MIRI-bright, dust-attenuated QGs in the distant universe.
Friday, 1 November 2024
Saturday, 2 November 2024
Sunday, 3 November 2024
Monday, 4 November 2024
Tuesday, 5 November 2024
Wednesday, 6 November 2024
Thursday, 7 November 2024
09:15
Microlensing of continuous gravitational waves
-
Sreekanth Harikumar
(
National Centre for Nuclear Research(NCBJ)
)
Microlensing of continuous gravitational waves
Sreekanth Harikumar
(
National Centre for Nuclear Research(NCBJ)
)
09:15 - 10:15
Room: Room 207
The direct detection of gravitational waves (GWs) by the LIGO Science Collaboration marked the beginning of a new era in astronomy, allowing us to probe previously inaccessible realms of the universe. Among the most exciting prospects in this field is the detection of gravitationally lensed GWs, which could reveal valuable insights about intervening mass distributions in space. While much attention has focused on detecting lensing in GWs from merging compact binaries, little exploration has been directed toward the lensing of GWs emitted by isolated neutron stars. These GWs are continuous and monochromatic, differing significantly from the transient "chirp" signals we typically observe. In this talk, I will discuss our findings on the lensing of continuous GWs by dark mini-halos and demonstrate how the relative motion between the lens, source, and observer can produce a distinctive microlensing pattern. This work opens new avenues in the study of GW lensing and could provide unique insights into the nature of dark matter besides enhancing the detectability of a signal.
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
09:15
Neutrinophillic scalar detection prospects at a future muon collider
-
Jyotismita Adhikary
(
NCBJ
)
Neutrinophillic scalar detection prospects at a future muon collider
Jyotismita Adhikary
(
NCBJ
)
09:15 - 10:15
Room: Room 207
In the upcoming muon collider, high-energy collisions between muons and antimuons will reach center-of-mass energies up to 10 TeV. Decays of these muons in the beam pipe will produce a high-energy muon neutrino beam. The energy and intensity of the beam, as well as its well-known energy spectrum, provide a unique opportunity to study neutrino properties and interactions, potentially uncovering new physics beyond the Standard Model. In this talk, I will discuss the prospects for detecting new mediators that couple predominantly to neutrinos with masses in the 1 MeV to 100 GeV range with low coupling strengths. Such a neutrinophillic mediator, which could couple to the dark sector, is a well-motivated candidate for opening new avenues in the search for neutrino portal dark matter. The corresponding signature would include neutrino charged-current scattering events associated with positively charged muons.
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
09:15
Nuclear chirality as a part of nuclear physics
-
Adam Nałęcz-Jawecki
(
NCBJ
)
Nuclear chirality as a part of nuclear physics
Adam Nałęcz-Jawecki
(
NCBJ
)
09:15 - 10:15
Room: Room 207
Nuclear chirality, a phenomenon known for only 27 years, is being found in more and more different nuclei, around 60 isotopes found to date. Nuclear chirality can occur in the excited state when the nuclei is triaxially deformed. In this seminar, I will show why and how we examine excited states in nuclei, what is the nuclear chirality, and how it can be found. I will also show the final results of the experiment performed in July 2022 at Heavy Ion Laboratory in Warsaw and state the most important outcomes.
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
09:15
Galactic foreground bias in CMB lensing reconstruction
-
Kishan Deka
(
NCBJ (BP4)
)
Galactic foreground bias in CMB lensing reconstruction
Kishan Deka
(
NCBJ (BP4)
)
09:15 - 10:15
Room: Room 207
Weak gravitational lensing remaps the primordial anisotropies in the Cosmic Microwave Background (CMB), contaminating the measurements of cosmological parameters. Estimating the lensing potential field and delensing the CMB maps of high sensitivity experiments are crucial for improving cosmological measurements. However, one of the main obstacles for these tasks is the presence of foreground emissions from our own Galaxy. In this talk, I will discuss about CMB weak lensing reconstruction methods and the impact of galactic foreground emissions. I will present my results on galactic foreground bias in the context of upcoming CMB Stage-4 survey.
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
09:15
Cancelled due to the Annual Reporting Seminar
Cancelled due to the Annual Reporting Seminar
09:15 - 10:15
Room: Room 207
Friday, 6 December 2024
Saturday, 7 December 2024
Sunday, 8 December 2024
Monday, 9 December 2024
Tuesday, 10 December 2024
Wednesday, 11 December 2024
Thursday, 12 December 2024
09:15
Asymptotically safe gravity as a guiding light to particle phenomenology
-
Abhishek Chikkaballi
Asymptotically safe gravity as a guiding light to particle phenomenology
Abhishek Chikkaballi
09:15 - 10:15
Room: Room 207
Compelling evidence suggests the existence of new physics beyond the Standard Model. However, in the absence of new experimental data, the energy scales associated with this new physics remain unknown. In this talk, I will give an overview of how the asymptotic safety paradigm can offer insights into these unknowns, addressing several of the outstanding puzzles and challenges within the Standard Model. Specifically, I will discuss how the presence of a specific fixed point structure in the renormalization group flow of model parameters—induced by gravitational corrections above the Planck scale—has several interesting implications. Firstly, I will discuss how this framework could lead to predictions of the new-physics couplings in U(1)’ extensions of the Standard Model. As a second example, I will discuss how this paradigm could give rise to a dynamical mechanism to generate small neutrino masses in the gauged B-L extension and its phenomenological signatures. Finally, I will demonstrate how asymptotically safe gravity can make a measurable contribution to the SMEFT coefficients, challenging the expectation that such contributions are suppressed by the Planck scale.
Friday, 13 December 2024
Saturday, 14 December 2024
Sunday, 15 December 2024
Monday, 16 December 2024
Tuesday, 17 December 2024
Wednesday, 18 December 2024
Thursday, 19 December 2024
09:15
Search for signatures of physics beyond the Standard Model in vector boson scattering processes at the CMS experiment at LHC
-
Mohammad Mousavi
Search for signatures of physics beyond the Standard Model in vector boson scattering processes at the CMS experiment at LHC
Mohammad Mousavi
09:15 - 10:15
Room: Room 207
Vector Boson Scattering (VBS) is essential for understanding electroweak symmetry breaking and testing the Standard Model at high energies. At the LHC, the CMS experiment investigates VBS processes to identify potential deviations, such as anomalous quartic gauge couplings (aQGCs), which could hint at new physics, including undiscovered particles or interactions. This project focuses on the scattering of two same-sign W bosons, producing two same-sign leptons, neutrinos, and two jets. For this analysis, we used a subset of Run 3 data from 2022, corresponding to an integrated luminosity of 27 fb⁻¹. Background estimation incorporates both Monte Carlo (MC) simulations and a data-driven approach for non-prompt backgrounds.
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
09:15
Exploring Graviton Mass through Strongly Lensed Gravitational Waves
-
Shuaibo Geng
(
National Center for Nuclear Research
)
Exploring Graviton Mass through Strongly Lensed Gravitational Waves
Shuaibo Geng
(
National Center for Nuclear Research
)
09:15 - 10:15
Room: Room 207
Recent advancements in time-domain surveys have significantly increased the detection of various explosive transient events across the universe, including supernovae, gamma-ray bursts, fast radio bursts, and gravitational waves (GWs). Some of these events can manifest as multiple images due to gravitational lensing. While numerous strongly lensed distant galaxies and quasars have been cataloged, the strong lensing of explosive transients offers new scientific possibilities. These opportunities range from refining measurements of cosmological parameters and detecting dark matter, to testing fundamental physics. Particularly, the long wavelengths of GWs suggest that wave optics effects are crucial in some instances, potentially leading to novel uses of these lensing phenomena. With the next generation of GW detectors expected to enhance sensitivity tenfold, the observable volume of the universe could expand by a thousandfold, substantially increasing detection rates of lensed GW signals. This surge in data provides a unique platform to examine critical physical theories, such as the properties of gravitons, by studying strongly lensed gravitational waves. In this work, we investigate constraints on the graviton mass by analyzing strongly lensed GW signals from typical binary black hole mergers. We simulate the response of next-generation ground-based GW detectors, such as the Einstein Telescope, to better gauge the potential of upcoming observations. Our analysis assesses the capacity of future GW data to place meaningful constraints on graviton mass, thereby offering fresh perspectives on the nature of gravity at cosmic scales. This study underscores the critical role of gravitational lensing in enhancing GW astronomy's capability to address fundamental physics questions, with broad implications for our understanding of the universe's fundamental structure
Friday, 10 January 2025
Saturday, 11 January 2025
Sunday, 12 January 2025
Monday, 13 January 2025
Tuesday, 14 January 2025
Wednesday, 15 January 2025
Thursday, 16 January 2025
09:15
Precision calculations for high energy scattering: SIDIS and Inclusive DIS at next-to-eikonal order
-
Swaleha Mulani
(
National Centre for Nuclear Research(NCBJ), Warsaw, Poland
)
Precision calculations for high energy scattering: SIDIS and Inclusive DIS at next-to-eikonal order
Swaleha Mulani
(
National Centre for Nuclear Research(NCBJ), Warsaw, Poland
)
09:15 - 10:15
Room: Room 207
Studying high-energy hadronic scattering processes to understand the structure of nuclei has been the focus of experimental and theoretical studies for more than three decades now. The Color Glass Condensate (CGC) effective theory has been developed and used to study particularly high-energy dilute-dense collisions. One of the main approximations adopted in the Color Glass Condensate is the so-called eikonal approximation, which amounts to neglecting power-suppressed corrections in the high-energy limit. This approximation is well justified for asymptotically high energies. However, corrections to it might be sizable in practice, in particular at the Relativistic Heavy Ion Collider and the upcoming Electron-Ion Collider. Therefore, we need to bring precision in theory to analyze the upcoming data from the colliders. For this, we have to compute observables like scattering cross sections beyond the leading order of energy. Deep inelastic scattering (DIS) is one of the clean channels used to study CGC beyond eikonal order. In my talk, I will briefly review the eikonal approximation and how to go beyond eikonal order. Furthermore, I will present its application to semi-inclusive deep inelastic scattering (SIDIS) and Inclusive DIS. Specifically, I will present computations of new contributions to the cross-section of SIDIS at next-to-eikonal accuracy stemming from the t-channel quark exchange, by including the effect of the quark background field for the target and obtain its relation to Transverse momentum dependent (TMD) calculations in small-x limit. I will also present similar studies for inclusive DIS.
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
09:15
Study of direct photon production in Pb-Pb collisions at √sNN = 5.02 TeV with ALICE experiment’s Photon Spectrometer(PHOS) at Large Hadron Collider
-
Sushobhan Mandal
(
NCBJ
)
Study of direct photon production in Pb-Pb collisions at √sNN = 5.02 TeV with ALICE experiment’s Photon Spectrometer(PHOS) at Large Hadron Collider
Sushobhan Mandal
(
NCBJ
)
09:15 - 10:15
Room: Room 207
The Quark-Gluon Plasma (QGP), a state of deconfined quarks and gluons, is believed to have existed in the early Universe shortly after the Big Bang. As the QGP cools, it transitions into the hadronic matter we observe today. In laboratory settings, small-scale "Big Bangs" are created through high-energy heavy-ion collisions, which heat the hadronic matter above the transition temperature, approximately 150 MeV, resulting in the formation of the QGP. Direct photons serve as unique probes in high-energy proton-proton and nucleus-nucleus collisions due to their weak interaction with the dense and hot quark-gluon medium. These photons escape the medium unaltered, providing undistorted information about the collision's evolution. In the ALICE experiment at the Large Hadron Collider (LHC), photons from lead-lead collisions are measured using techniques such as the Photon Conversion Method and Electromagnetic Calorimeter. The Photon Spectrometer (PHOS), offering high-precision photon detection, was used for our analysis (with Run 2 data in Pb-Pb collisions at √sNN = 5.02 TeV) to measure inclusive photons and simulate decay photons, aiding in the derivation of direct photon spectra. By disentangling the contributions of decay, prompt and thermal photons emitted during these collisions, we can estimate the effects of cold and hot nuclear matter and gain insights into the temperature, correlations, and collective phenomena within the QGP.
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
09:15
Hunting the invisible with ALMA: the path for the first measurement of cold gas and dust in quiescent galaxies.
-
Giuliano Lorenzon
(
NCBJ
)
Hunting the invisible with ALMA: the path for the first measurement of cold gas and dust in quiescent galaxies.
Giuliano Lorenzon
(
NCBJ
)
09:15 - 10:15
Room: Room 207
The synergy between the Near/Mid-infrared JWST and the sub-mm ALMA telescopes allows to explore the low frequency emission of galaxies with a sensitivity and resolution hardly achieved before. Amongst the many amazing discoveries, this couple of telescopes is deeply revolutionazing our understanding of galaxy evolution by unveiling a population of galaxies with very low star formation, or quiescent, that contains copious amount of cold interstellar medium. These observations, althoug still rare, are changing the current paradigm for the formation of quiescent galaxies, possibly even mining their in-use definition. In my previous work, I used the state-of-the-art suit of cosmological simulations SIMBA to tackle the physical processes generating dust-rich quiescnet galaxies up to z~2, comparing the effect of internal and environmental mechanisms for star formation quenching on the evolution of the ISM content. We find in SIMBA indications that dust grains can survive for much longer than expected, depending on the balance between the growth rate and the rate of grain destruction operated by the active galactic nucleus. To test these results, we requested time at the ALMA sub-mm/radio interferometer, which was awarded to us with high priority. As the principal investigator of the awarded project “Hunting the prolongued dust growth in dusty quiescent galaxies at intermediate redshift”, I will present the challenges that arise when competing for data in astronomy, and I will give a brief lesson on how the complex ALMA telescope works.
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
09:15
Probing the baryon cycle of primordial galaxies in the ALMA and JWST era
-
Prasad Sawant
(
National Centre for Nuclear Research, Poland
)
Probing the baryon cycle of primordial galaxies in the ALMA and JWST era
Prasad Sawant
(
National Centre for Nuclear Research, Poland
)
09:15 - 10:15
Room: Room 207
Observational facilities such as Atacama Large Millimeter/submillimeter Array (ALMA) and James Webb Space Telescope (JWST) have propelled astronomy into a new era. With an increasing influx of observations, we are encountering cosmic objects that challenge our theoretical frameworks. Especially, recent studies reporting abnormally high gas and dust reservoirs in the galaxies challenge our current prescriptions about dust formation in the early Universe. In this work, we make use of chemical evolution models to probe the evolution of gas and dust within star-forming galaxies at a redshift of ~ 5, observed by the ALMA Large Program ALPINE. These galaxies were formed just one billion years after the Big Bang, which denotes a crucial phase when the Universe underwent transformation from the primordial galactic formation to the onset of the peak of cosmic star formation rate density. We attempt to match the observed dust content and star formation rate of these galaxies by considering different dust production mechanisms, including Type II supernovae, asymptotic giant branch stars, and dust growth within the ISM. Our models successfully reproduce the gas and dust content in most of these primordial galaxies, indicating dust production primarily through SNII and gas/dust removal via galactic outflows and moderate inflow of primordial gas. However, a fraction of galaxies show a rapid dust build-up in a short time-frame (~ 20 - 100 Myr). This fast dust production might be partially explained by adopting a top-heavy initial mass function, thus favouring the formation of more massive stars and a more rapid stellar evolution. I will also discuss the role and synergies between ALMA and JWST in advancing our knowledge of chemical enrichment in the early Universe.
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
09:15
Towards a measurement of the CP structure of the Higgs->TauTau Yukawa coupling: Tau Energy Calibration
-
Hagop Awedikian
Towards a measurement of the CP structure of the Higgs->TauTau Yukawa coupling: Tau Energy Calibration
Hagop Awedikian
09:15 - 10:15
Room: Room 207
In this seminar, we will explore the CP structure of the Higgs-tau lepton coupling, an aspect of ongoing studies in Higgs physics beyond the Standard Model. We will begin with an introduction to the theoretical motivation, highlighting the relevance of CP violation in the Higgs sector as a possible extension of known CP-violating effects to fulfill the requirements for explaining the observed matter-antimatter asymmetry. Next, we will discuss the data analysis techniques employed in the CMS experiment at the LHC, focusing on di-tau final states. Given the importance of precise measurements, a crucial part of this study involves the calibration of the tau energy scale (TES). We will review the methods used for TES calibration to ensure the accuracy of experimental results, which is essential for probing CP-violating effects in Higgs decays.
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
09:15
Studying vector-like fermions as candidates for New Physics from different perspectives
-
Daniele Rizzo
(
National Center for Nuclear Research (NCBJ), Warsaw, Poland
)
Studying vector-like fermions as candidates for New Physics from different perspectives
Daniele Rizzo
(
National Center for Nuclear Research (NCBJ), Warsaw, Poland
)
09:15 - 10:15
Room: Room 207
In this presentation I will go through some of the projects I have been working on during my PhD. I will try to convey that vector-like fermions are an interesting candidate for new physics, discussing different approaches for including such particles in beyond the Standard Model theories.
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
09:15
At the Corner of Quantum and Gravity
-
Ludovic Varrin
At the Corner of Quantum and Gravity
Ludovic Varrin
09:15 - 10:15
Room: Room 207
In this talk, I will begin with a broad overview of the problem of quantum gravity — the challenge of reconciling general relativity with quantum mechanics. Along the way, I will highlight key developments from recent decades that offer valuable insights into the features that a consistent quantum theory of gravity is expected to incorporate. I will then describe a bottom-up strategy that takes symmetries as the foundational principle. Next, I will discuss how this framework can be applied to the problem of local subsystems and spacetime entanglement entropy. I will also mention some outlooks and perspectives for future directions.
Friday, 28 March 2025
Saturday, 29 March 2025
Sunday, 30 March 2025
Monday, 31 March 2025
Tuesday, 1 April 2025
Wednesday, 2 April 2025
Thursday, 3 April 2025
Friday, 4 April 2025
Saturday, 5 April 2025
Sunday, 6 April 2025
Monday, 7 April 2025
Tuesday, 8 April 2025
Wednesday, 9 April 2025
Thursday, 10 April 2025
09:15
β-Ga2O3 implanted with rare earth ions: a new generation of semiconductors
-
Joanna Matulewicz
(
NCBJ
)
β-Ga2O3 implanted with rare earth ions: a new generation of semiconductors
Joanna Matulewicz
(
NCBJ
)
09:15 - 10:15
Room: Room 207
Nowadays, material research is driven by new technologies that aim to improve existing materials or replace them with more efficient and cost-effective alternatives. Compound semiconductors have become essential in this context, particularly for optoelectronic applications such as lasers, displays, or white LEDs, where silicon cannot be used due to its indirect and relatively narrow bandgap. β-Ga2O3 is an emerging ultra-wide-bandgap semiconductor with strong resistance to radiation and high temperatures, making it suitable for use in harsh environments. Doping β-Ga2O3 with rare earth ions can modify its optical properties, expanding its range of potential applications. In this talk, I will present research on the effects of ion implantation – a method of doping – on the crystal structure of β-Ga2O3, as well as its structural recovery after thermal annealing.
Friday, 11 April 2025
Saturday, 12 April 2025
Sunday, 13 April 2025
Monday, 14 April 2025
Tuesday, 15 April 2025
Wednesday, 16 April 2025
Thursday, 17 April 2025
Friday, 18 April 2025
Saturday, 19 April 2025
Sunday, 20 April 2025
Monday, 21 April 2025
Tuesday, 22 April 2025
Wednesday, 23 April 2025
Thursday, 24 April 2025
09:15
Towards automatizing Higgs decays in BSM models at one-loop in the decoupling renormalization scheme
-
Jonas Lang
(
National Center for Nuclear Research Poland
)
Towards automatizing Higgs decays in BSM models at one-loop in the decoupling renormalization scheme
Jonas Lang
(
National Center for Nuclear Research Poland
)
09:15 - 10:15
Room: Room 207
High-precision calculations of Higgs boson observables can be used to constrain models of the Beyond the Standard Model (BSM) physics. Motivated by the non-observation of light BSM particles at the LHC, in this talk I will discuss a renormalization scheme for precise predictions of Higgs boson decays in the presence of a moderatelly heavy BSM physics at the 1-loop level. I will cover the basics of regularization and renormalization. Special focus will be on the decoupling renormalization scheme, where I will present the renormalization conditions for a generic model. I will also show application of the decoupling scheme in a concrete model to explore its effects. This calculation is a part of FlexibleSUSY spectrum-generator generator and will be automatically applied to any user defined BSM model in the future.
Friday, 25 April 2025
Saturday, 26 April 2025
Sunday, 27 April 2025
Monday, 28 April 2025
Tuesday, 29 April 2025
Wednesday, 30 April 2025
Thursday, 1 May 2025
Friday, 2 May 2025
Saturday, 3 May 2025
Sunday, 4 May 2025
Monday, 5 May 2025
Tuesday, 6 May 2025
Wednesday, 7 May 2025
Thursday, 8 May 2025
09:15
Constraining Cosmology Through CMB Lensing
-
Paweł Siegmund
(
NCBJ
)
Constraining Cosmology Through CMB Lensing
Paweł Siegmund
(
NCBJ
)
09:15 - 10:15
Room: Room 207
This presentation explores the role of gravitational lensing of the Cosmic Microwave Background (CMB) in modern cosmology. By analyzing the deflection of CMB photons by large-scale structures, we gain access to crucial information about the universe’s composition and evolution. The talk outlines observational data, theoretical frameworks, and statistical methods - particularly Bayesian inference - used to extract cosmological parameters from CMB lensing signals. It also discusses the challenges and future prospects in improving accuracy through delensing, noise mitigation or foreground cleaning."
Friday, 9 May 2025
Saturday, 10 May 2025
Sunday, 11 May 2025
Monday, 12 May 2025
Tuesday, 13 May 2025
Wednesday, 14 May 2025
Thursday, 15 May 2025
09:15
On the Photon-Jet Production. The Color Glass Condensate in pA Collision.
-
Jules Favrel
(
National Center for Nuclear Researches, NCBJ
)
On the Photon-Jet Production. The Color Glass Condensate in pA Collision.
Jules Favrel
(
National Center for Nuclear Researches, NCBJ
)
09:15 - 10:15
Room: Room 207
After an introduction of the concept of Saturation occurring in nuclear physic, we develop the Color Glass Condensate formalism through a specific event of proton-nuclei collisions, the photon-Jet production. In the present work we consider the first correction to the nuclei's size, the Next-to-Eikonal (NEik) approximation. The differential cross section of the process is found to be factorised for particles produced back-to-back. In accordance with previous results found at NCBJ, the small x value probing the gluon distribution is fixed by subeikonal effects together with the back-to-back expansion.
Friday, 16 May 2025
Saturday, 17 May 2025
Sunday, 18 May 2025
Monday, 19 May 2025
Tuesday, 20 May 2025
Wednesday, 21 May 2025
Thursday, 22 May 2025
09:15
Search for Exotics in B decays at LHCb
-
Salil Joshi
(
NCBJ
)
Search for Exotics in B decays at LHCb
Salil Joshi
(
NCBJ
)
09:15 - 10:15
Room: Room 207
The spectroscopic studies of heavy hadrons in the charmonium or bottomonium sector are crucial in providing powerful insights into the intricacies of quantum chromodynamics (QCD) in the non-perturbative regime. QCD, becomes highly non-perturbative at the scales typical of hadron size, hence describing these hadrons as bound quark systems from first principles is challenging. Experimental observations have driven some progress, leading to the discovery of nearly 30 exotic hadron candidates. It is the pattern of one unexpected result after another, with the emergence of desperately few connections, that has characterized the last 20 years of experimental studies in this field. The LHCb, with its unique capability to cover the large heavy-quark production cross-section at the LHC, offers an great window of opportunity to explore heavy hadron spectroscopy, in both the conventional and exotic sectors. This presentation is a synopsis of our work in search of QCD exotica in new decay modes of B-mesons in order to improve the previous measurements and make new observations of these incredible anomalies. I will present current results regarding higher charmonium states which are not fully understood and the possibility of observation of such states in previously un-measured decay modes of B meson in the LHCb data, collected from Run 1 (2011-2012) and Run 2 (2015-2018) in proton-proton (p-p) collisions.
Friday, 23 May 2025
Saturday, 24 May 2025
Sunday, 25 May 2025
Monday, 26 May 2025
Tuesday, 27 May 2025
Wednesday, 28 May 2025
Thursday, 29 May 2025
09:15
Freezing-in Cannibal Dark Matter
-
Juan Esau Cervantes Hernandez
(
NCBJ Warsaw
)
Freezing-in Cannibal Dark Matter
Juan Esau Cervantes Hernandez
(
NCBJ Warsaw
)
09:15 - 10:15
Room: Room 207
Secluded dark sectors, while offering an appealing framework for dark matter production through internal interactions, lack direct experimental avenues. In this talk, I will introduce the concept of self-interacting dark matter and the self-annihilation mechanism known as cannibal dark matter. I will then connect the dark sector to the Standard Model via a feeble coupling to the Higgs doublet, within a freeze-in production scenario that could also account for the origin of the dark sector itself. The dynamics of these processes require solving the Boltzmann equation, including the evolution of the dark sector temperature, which has important phenomenological implications. Finally, I will discuss how these production mechanisms are affected in non-standard cosmologies, particularly in matter-dominated scenarios with low reheating temperatures.
Friday, 30 May 2025
Saturday, 31 May 2025
Sunday, 1 June 2025
Monday, 2 June 2025
Tuesday, 3 June 2025
Wednesday, 4 June 2025
Thursday, 5 June 2025
09:15
Quark-gluon plasma in magnetic fields
-
Patrycja Słoń
Quark-gluon plasma in magnetic fields
Patrycja Słoń
09:15 - 10:15
Room: Room 207
An impact of the electromagnetic field in the presence of strong interactions is usually not considered, as it typically plays a negligible role. However, the electromagnetic field becomes visible when its magnitude is characteristic for strong interactions. It is not accessible experimentally to create such a strong magnetic field. Nevertheless, it is expected that a field of a very large amplitude can briefly arise in relativistic heavy ion collisions, and be sustained by induced electric currents in the quark-gluon plasma created during the collision of ions. The project aims to analyze the electromagnetic field generated in relativistic heavy ion collisions. The research project will include a discussion of aspects that have not been analyzed so far, such as formulating the problem of generating an electromagnetic field as an initial value problem, and analyzing the behaviour of the quark- gluon plasma in such a field. The main goal is to take into account non-equilibrium effects by properly setting the initial conditions.
Friday, 6 June 2025
Saturday, 7 June 2025
Sunday, 8 June 2025
Monday, 9 June 2025
Tuesday, 10 June 2025
Wednesday, 11 June 2025
Thursday, 12 June 2025
09:15
Modern Measurements of Merger Morphologies
-
Aidan Cotter
Modern Measurements of Merger Morphologies
Aidan Cotter
09:15 - 10:15
Room: Room 207
In the current model of galaxy evolution, mergers play a key role in driving the mass build-up of galaxies as well as triggering active galactic and starbursts. Identifying galaxy mergers in large datasets is a difficult task due to their irregular and highly dynamic morphologies. In this seminar I will discuss some of the most common methods for identifying galaxy mergers through visual methods, statistical approaches, kinematics, and machine learning. I will then discuss some of the early results from my PhD research starting with a review of how morphologies are quantified. These early results compare statistical merger classifiers to a suite of machine learning methods developed by Margalef-Bentabol et al. 2024. For this project, a Monte-Carlo Markov Chain was used to optimise the classifier performance. I will show that statistical techniques can achieve similar precision to machine learning methods but lack completeness in their merger classifications. In future work, unsupervised learning may be used to improve the completeness of these classifications to produce a highly efficient and reliable merger classifier for use on large surveys.
Friday, 13 June 2025
Saturday, 14 June 2025
Sunday, 15 June 2025