Multiplicity dependent transverse momentum distributions of hadrons of different species in the extended multipomeron exchange model

19 Sept 2025, 15:20
20m
LHEP-215/Conference Hall - Конференц-зал корп. 215 (VBLHEP)

LHEP-215/Conference Hall - Конференц-зал корп. 215

VBLHEP

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20 min. Relativistic heavy ion collisions Relativistic heavy ion collisions

Speaker

Kovalenko, Vladimir (Saint Petersburg State University)

Description

A new generalization of the Multipomeron exchange model [1-4] for studying the multiparticle production in pp, pA and AA collisions is proposed, taking into account the effect of event-by-event string tension fluctuations [5]. It is shown that the new version of the model correctly reproduces the characteristic thermal behavior of $p_\rm{T}$ spectra in a wide energy range. Simultaneously, the $p_\rm{T}$-multiplicity correlation functions are shown to be satisfactorily described together with the multiplicity-dependent $p_\rm{T}$ spectrum. The new finite mass approach allowed to study contributions to the spectra and correlation functions of various types of identified particles.

The authors acknowledge Saint-Petersburg State University for a research project 103821868.

  1. N. Armesto, D.A. Derkach, G.A. Feofilov, p(t)-multiplicity correlations in a multi-Pomeron-exchange model with string collective effects, Phys. Atom. Nucl. 71, 2087–2095 (2008).
  2. E. Bodnia, D. Derkach, G. Feofilov, V. Kovalenko, A. Puchkov, Multi-pomeron exchange model for pp and $\mathrm{p}\bar{\mathrm{p}}$ collisions at ultra-high energy, PoS QFTHEP2013 2013, 60 (2013).
  3. V. Kovalenko, G. Feofilov, A. Puchkov, F. Valiev, Multipomeron Model with Collective Effects for High-Energy Hadron Collisions, Universe 8, 246 (2022).
  4. V. Vechernin, E. Andronov, V. Kovalenko, A. Puchkov, Multiplicity Distributions and Modified Combinants in the Multipomeron Model of pp Interaction at High Energies, Universe 10, 56 (2024).
  5. A. Bialas, Fluctuations of the string tension and transverse mass distribution, Phys. Lett. B 466, 301–304 (1999).

Author

Kovalenko, Vladimir (Saint Petersburg State University)

Co-authors

Puchkov, Andrei (Saint Petersburg State University) Vechernin, Vladimir (Saint Petersburg State University) Andronov, Evgeny (Saint Petersburg State University)

Presentation materials