Theory and Experiment in High Energy Physics

Session

Short talks

12 Mar 2024, 15:10

Building 3, 2nd floor Council Room (Tanácsterem) (HUN-REN Wigner Research Centre for Physics, Budapest, Hungary)

Conveners

Short talks

• Gergely Gabor Barnafoldi (HUN-REN Wigner Research Centre for Physics (HU))

Short talks

• Gergely Gabor Barnafoldi (HUN-REN Wigner Research Centre for Physics (HU))

Short talks

• Andre Sopczak (Czech Technical University in Prague (CZ))

Short talks

• Peter Matak (Comenius University (SK))

Short talks

• Peter Matak (Comenius University (SK))

Short talks

• Gabor Somogyi (HUN-REN Wigner Research Centre for Physics (HU))

13. Can Rotation Solve the Hubble Puzzle?

Balazs Endre Szigeti (HUN-REN Wigner Research Centre for Physics (HU))

12/03/2024, 15:10

The Hubble constant H0 is a key parameter determining the rate of the Universe’s expansion. Presently, the discrepancy between the low and high redshift measurements of H0 is the highest significance tension within the concordance ΛCDM paradigm. We show that a rotating dark-fluid variant of the concordance model resolves this tension with an angular velocity today ω0 ≲ 10−3 Gyr-1.Curiously,...

2. Studies of ATLAS Forward Proton (AFP) ToF performance with Run-3 data

Viktoriia Lysenko (Czech Technical University in Prague (CZ))

12/03/2024, 15:40

The analysis of the early LHC Run-3 data was performed. Efficiencies and resolutions for the ATLAS Forward Proton (AFP) Time-of-Flight (ToF) detector were studied with different methods. In addition, these performance studies of the ToF data included the proton-proton vertex reconstruction using matching of ToF and central ATLAS vertex position. After a calibration, a preliminary resolution of...

4. Exact quark mass corrections to Higgs production in association with a jet

Gabor Somogyi (HUN-REN Wigner Research Centre for Physics (HU))

12/03/2024, 16:30

In this talk, we present the computation of the next-to-leading order QCD corrections to the production of a Higgs boson in association with a jet at the LHC, including the exact dependence on the masses of quarks circulating in heavy-quark loops. The NLO corrections are computed including the top-quark mass and the bottom-quark mass as well. We show results in the on-shell mass scheme as well...

3. Anomalous dimensions for hard exclusive processes

Dr Sam Van Thurenhout (HUN-REN Wigner RCP)

12/03/2024, 17:00

We give an overview of recent developments in the computation of the anomalous dimension matrix of composite operators in non-forward kinematics. The elements of this matrix determine the scale dependence of non-perturbative parton distributions such as the generalized parton distribution functions. The latter provide important information about hadronic structure and are accessible...

25. Search for Axion-Like-Particle (ALP) with the ATLAS Forward Proton (AFP) Detector with Di-photons

Andre Sopczak (Czech Technical University in Prague (CZ))

12/03/2024, 17:30

A search for forward proton scattering in association with light-by-light scattering mediated by an axion-like particle is presented, using the ATLAS Forward Proton spectrometer to detect scattered protons and the central ATLAS detector to detect pairs of outgoing photons. Proton-proton collision data recorded in 2017 at a centre-of-mass energy of √ s =13 TeV were analysed, corresponding to...

10. Strong coupling expansion of determinant observables in N=4 SYM

Bercel Boldis (HUN-REN Wigner Research Centre for Physics, Budapest University of Technology and Economics)

13/03/2024, 10:00

A special class of observables in N=4 and N=2 SYM can be expressed as determinants of semi-infinite matrices. At strong coupling, the expansion of these observables are asymptotic. The perturbative coefficients was already determined in the literature. We have established a method to systematically calculate the non-perturbative part as well. It is based on the fact that the elements of the...

23. Mesons in medium (in Hadron-Nucleus reactions)

György Wolf

13/03/2024, 10:30

Since dileptons can leave the dense phase of a reaction without distortion, their observation may allow us to observe in\,-\,medium effects on mesons produced in hadron induced reaction. The masses of the low lying charmonium states, the $J/\Psi$, $\Psi(3686)$, and $\Psi(3770)$ are shifted downwards due to the second order Stark effect. In hadron + \text{Au}$ collisions at $6-20$~GeV we study...

1. Exclusion bounds for neutral gauge bosons

Zoltán Péli (Institute for Theoretical Physics, ELTE Eötvös Loránd University)

13/03/2024, 14:00

We study how the recent experimental results constrain the
gauge sectors of $U(1)$ extensions of the standard model
using a novel representation of the parameter space.
We determine the bounds on the mixing angle between the massive
gauge bosons, or equivalently, the new gauge coupling as a function of
the mass $M_{Z'}$ of the new neutral gauge boson $Z'$ in the
approximate range...

15. Jet substructure measurements in heavy-ion collisions

Robert Vertesi (HUN-REN Wigner Research Centre for Physics (HU))

13/03/2024, 14:30

High-energy collisions of heavy ions produce hot and dense strongly coupled matter, the so-called quark--gluon plasma (QGP). Jets, which are collimated particle sprays resulting from parton fragmentation, are modified by the QGP. The loss of jet momentum in the hot and dense medium, called jet quenching, was one of the first tell-tale signs of the presence of QGP. Jet quenching alone, however,...

11. Trajectory reconstruction for proton computed tomography with machine learning

Bence Dudas (Eötvös Loránd University, Wigner Research Center for Physics)

13/03/2024, 15:00

Hadrontherapy is an alternative way of treating cancer. This method utilizes the Bragg peak of protons to destroy cancerous cells while minimize the harm in the healthy ones. The aim of Hadrontherapy is to beam in protons that deposits most of their energy inside the tumor.
Proton Computed Tomography (pCT) is a method for calculating relative stopping powers on protons in the body of a...

14. Image Reconstruction with Proton CT

Zsofia Jolesz

13/03/2024, 15:30

One of the most successful treatments in cancer therapy is proton therapy, with radiation planning being a key element. Photon CT is commonly used for this purpose; however, it does not provide sufficiently accurate information about the range of protons. Therefore, proton CT imaging is more favorable for radiation planning. Due to the Coulomb scattering of protons, it is important to...

12. Luminosity measurements using the ATLAS Forward Proton (AFP) detector

Petr Fiedler (Czech Technical University in Prague (CZ))

13/03/2024, 16:20

The latest results of luminosity measurements using the AFP detector are presented.

16. Probing hadron-quark phase transition in twin stars using f-modes

David Edwin Alvarez Castillo

14/03/2024, 09:00

Although it is conjectured that a phase transition from hadronic to deconfined quark matter is possible in the ultrahigh density environment in Neutron Stars, the nature of such a transition is still unknown. Depending on whether there is a sharp or slow phase transition, one may expect a third family of stable compact stars or “twin stars” to appear, with the same mass but different radii...

24. CERN lpGBT: Merging Timing, Data, and Control of Detectors

Tivadar Kiss (HUN-REN Wigner Research Centre for Physics (HU))

14/03/2024, 09:30

The presentation shows the recent evolution of the data, trigger and control links in HEP experiments, using the CERN ALICE detector as an example. It gives an introduction of the CERN GBT/lpGBT protocol and their implementation in a radiation environment, the versatile link optical components, and some back-end interface cards (CRU, FELIX) that make the integration of the connected systems possible.