42nd International Symposium on Physics in Collision

Session

Parallel Session 2

12 Oct 2023, 11:00

Room 101 (Room 101)

Conveners

Parallel Session 2

• Carlos Contreras Hidalgo

Parallel Session 2

• Nicolas Neill (Universidad de Tarapacá)

Parallel Session 2

• Samuel Louis Bein (Hamburg University (DE))
• Marat Siddikov

45. Effect of nuclear structure on particle production in heavy-ion collisions using the AMPT model

Dr Vipul Bairathi (Instituto de Alta Investigación, Universidad de Tarapacá)

12/10/2023, 11:00

Heavy Ion Collisions

Oral presentation

Various nuclei, like Cu, Au, Pb, and U, have collided in various relativistic heavy-ion colliders to comprehend the medium of de-confined quarks and gluons called Quark-Gluon Plasma (QGP). The STAR data for isobar, Ru+Ru, and Zr+Zr, collisions at $\sqrt{s_{\mathrm {NN}}}$ = 200 GeV, provide hints of different nuclear structure between the two isobar nuclei through collective flow and...

35. Multiplicity distributions and entropy of the produced particles in one dimensional models and QCD

Eugene Levin

12/10/2023, 11:20

High Energy Particle Physics

Oral presentation

n this talk I wish to clarify two questions that have been left unanswered in the paper D.Kharzeev and E. Levin:
``Deep inelastic scattering as a probe of entanglement,''
Phys. Rev. D \textbf{95} (2017) no.11, 114008.
In this paper we compute the von Neumann entropy of the system of partons resolved by deep inelastic scattering at a given Bjorken $x$ and momentum transfer $q^2 = - Q^2$. ...

33. Exclusive production of heavy meson pairs: a novel tool for study of the partonic content of the proton.

Marat Siddikov

12/10/2023, 11:45

High Energy Particle Physics

Oral presentation

In this talk we briefly overview various channels used for phenomenological studies of the partonic structure of the target, which is usually encoded in Generalized Parton Distributions (GPDs), and also summarize our recent theoretical studies of exclusive production of heavy mesons pairs (quarkonia and heavy-light $D$-mesons). We argue that at moderate energies (for example, in the kinematics...

39. Boundary effects in the parity-breaking hadronic medium

Dr Oleg Novikov (Saint-Petersburg State University, V.A.Fock Department of Theoretical Physics)

12/10/2023, 12:10

Heavy Ion Collisions

Oral presentation

It was argued that local parity breaking may emerge in hot dense hadronic medium. We investigate the possibility of formation of photon and vector meson states localized in the transition region between domains with different axial chemical potential values. Using the vector meson dominance model modified to take into account parity-breaking backgrounds we obtain the spectrum of such states...

47. On measurement of spin quantization axis of the $V$- meson resonance via the cross sections of inclusive reaction $A+B\Longrightarrow V+X\Longrightarrow 1+2+X$ and relativistic partial wave analysis of the $V$-meson decay reaction $V\Longrightarrow 1+2$.

Alexander Machavariani

12/10/2023, 12:35

High Energy Particle Physics

Oral presentation

Relativistic procedure of explicit accounting of the orbital momentum and
spin of the $V$-meson resonance
is suggested for the high energy inclusive reaction
$A+B\Longrightarrow V+X\Longrightarrow 1+2+X$.
It is compared decays of the structureless and composite $V$-mesons.
Composite mesons are constructed within to the general field-theoretical
approach,
where hadrons and...

48. Study of thermodynamic variables in high-energy collisions using Tsallis Statistics

Rishabh Sharma (Indian Institute of Science Education and Research (IISER) Tirupati)

12/10/2023, 14:30

Heavy Ion Collisions

Oral presentation

High-energy collisions allow us to study the behaviour of matter at high temperature and density. Various experimental signatures suggest that a new state of matter called Quark-Gluon Plasma (QGP) is produced in heavy-ion collisions. However, recent results suggest that high-multiplicity $p$+$p$ collisions might also be able to produce QGP droplets. Therefore, there is a pressing need to gain...

52. Energy dependence of particle production in Au+Au collisions at BES energies using A Multiphase Transport Model

Krishan Gopal (IISER Tirupati)

12/10/2023, 14:50

Heavy Ion Collisions

Oral presentation

High-energy heavy-ion collision experiments aim to explore the phase transition from normal hadronic matter to the quark-gluon plasma (QGP), a deconfined state of quarks and gluons. The dynamics of relativistic heavy-ion collisions at various collision energies have been extensively studied using A Multi-Phase Transport (AMPT) model. The AMPT model is very sensitive to the input parameters,...

71. Direct determination of the Collins-Soper kernel

Armando Bermudez Martinez (CERN)

12/10/2023, 15:10

High Energy Particle Physics

Oral presentation

We present a novel method of extraction of the Collins-Soper kernel directly from the comparison of differential cross-sections measured at different energies. Using this method, we provide feasibility studies for the direct measurement of the Collins-Soper kernel with the CMS detector. We also solve a long standing problem of comparison between TMDs obtained from PB and factorization approaches.

50. Boltzmann vs Tsallis: analysis of transverse momentum spectra of hadrons in model-generated heavy-ion collisions

Evgeny Zabrodin

12/10/2023, 16:00

Heavy Ion Collisions

Oral presentation

We fit the transverse momentum spectra of hadrons from intermediate heavy-ion collisions, generated by two microscopic transport models, UrQMD and SMASH, to Boltzmann-Gibbs and to Tsallis distributions. The analysis is done (i) for the evolution of hot and dense nuclear matter in central area of central heavy-ion collisions and (ii) for the infinite nuclear matter, simulated in both models via...

82. Searching for light neutralinos with a displaced vertex at the LHC

Nicolas Neill (Universidad de Tarapacá)

12/10/2023, 16:30

High Energy Particle Physics

Oral presentation

We study a bino-like light neutralino ($\tilde \chi_1^0$) produced at the LHC from the decay of a scalar lepton ($\tilde e_L$) through the process $pp\to \tilde e_{L} \to e\tilde \chi_1^0$ in the context of R-parity-violating (RPV) supersymmetry where $\tilde \chi_1^0$ is the lightest supersymmetric particle. For small masses and RPV couplings, the neutralino is naturally long-lived and its...