Thermalization in a small hadron gas system and high-multiplicity 
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Sarkar, N.; Ghosh, P.

doi:10.1103/physrevc.96.044901

Cited by 13 publications

(11 citation statements)

References 37 publications

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“…Hence, in Figure 3, the x-axis becomes a replica of temperature although the explicit functionality with event multiplicity is not known. In view of this, the experimental behavior of particle mean free path assuming a common cross section for all particle species [35] as a function of temperature agrees with the theoretical expectations [45] for q ∼ 1.001 and µ B = 0, as shown in Figures 1 and 2. After a threshold of dN ch /dη ∼ (10-15), the mean free path becomes independent of particle species, and for higher event multiplicities, it attains a lower asymptotic value between (1-10) fm.…”

Section: Resultssupporting

confidence: 85%

Characterizing Proton-Proton Collisions at the Large Hadron Collider with Thermal Properties

Sahu

Sahoo

2021

Physics

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High-multiplicity proton-proton (pp) collisions at the Large Hadron Collider (LHC) energies have created a new domain of research to look for a possible formation of quark–gluon plasma in these events. In this paper, we estimate various thermal properties of the matter formed in pp collisions at the LHC energies, such as mean free path, isobaric expansivity, thermal pressure, and heat capacity using a thermodynamically consistent Tsallis distribution function. Particle species-dependent mean free path and isobaric expansivity are studied as functions of final state charged particle multiplicity for pp collisions at the center-of-mass energy s = 7 TeV. The effects of degree of non-extensivity, baryochemical potential, and temperature on these thermal properties are studied. The findings are compared with the theoretical expectations.

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Section: Resultssupporting

confidence: 85%

Characterizing Proton-Proton Collisions at the Large Hadron Collider with Thermal Properties

Sahu

Sahoo

2021

Physics

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“…[22], the ideal HRG model calculations can describe the physics of the strongly interacting matter up to small values of μ B /T , but fail at large μ B /T and/or T 160 MeV. We take r M = 0.2 fm from previous studies [60,61] [62]. The comparison of model calculations and the lattice simulations is presented in Fig.…”

Section: B Van Der Waals Hadron Resonance Gas (Vdwhrg)mentioning

confidence: 99%

van der Waals hadron resonance gas and QCD phase diagram

Sarkar

Ghosh

2018

Phys. Rev. C

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Taking into account the recently developed van der Waals (VDW)-like equation of state (EoS) for grand canonical ensemble of fermions, the temperature-dependent profiles of normalized entropy density (s/T 3 ) and the ratio of shear viscosity and entropy density (η/s) for hadron resonance gas have been evaluated. The VDW parameters, corresponding to interactions between (anti)baryons, have been obtained by contrasting lattice EoS for QCD matter at finite chemical potentials (μ B ) and for T 160 MeV. The temperature-and chemical-potentialdependent study of s/T 3 and η/s for hadron gas, by signaling onsets of first-order phase transition and crossover in the hadronic phase of QCD matter, helps in understanding the QCD phase diagram in the (T , μ B ) plane. An estimation of probable location of critical point matches predictions from other recent studies.

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“…Also there is not much deviation in charge radii between baryons and mesons, therefore, uniform hard-core radius (r h = 0.3 fm) is considered for all hadrons [20,23,28]. The effect of system size on volume and particle numbers, considered infinite in the thermodynamic limit, can be implemented by providing a lower momentum cut-off to the integral over momentum space [29][30][31]. The finite-size effect is introduced by using lower limit of momentum p cutoff (MeV) = 197π/D(fm) [31].…”

Section: Resultsmentioning

confidence: 99%

“…The effect of system size on volume and particle numbers, considered infinite in the thermodynamic limit, can be implemented by providing a lower momentum cut-off to the integral over momentum space [29][30][31]. The finite-size effect is introduced by using lower limit of momentum p cutoff (MeV) = 197π/D(fm) [31]. Here D = 2R is characteristic system size, R being system radius.…”

Section: Resultsmentioning

confidence: 99%

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Fluidity of the system produced in relativistic pp and heavy-ion collisions: Hadron resonance gas model approach

Scaria¹,

Sahu²,

Singh³

et al. 2022

Preprint

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We have estimated the dimensionless parameters such as Reynolds number (Re), Knudsen number (Kn) and Mach number (M a) for a multi-hadron system by using the excluded volume hadron resonance gas (EVHRG) model along with Hagedorn mass spectrum to include higher resonances in the system. The size dependence of these parameters indicate that the system formed in pro-ton+proton collisions may achieve thermal equilibrium making it unsuitable as a benchmark to analyze the properties of the system produced in heavy ion collisions at similar energies. While the magnitude of Kn can be used to study the degree of thermalization, the variations of Re and M a with temperature (T ) and baryonic chemical potential (µB) assist to understand the change in the nature of the flow in the system -from laminar to turbulent and from subsonic to supersonic, respectively.

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Thermalization in a small hadron gas system and high-multiplicity pp events

Cited by 13 publications

References 37 publications

Characterizing Proton-Proton Collisions at the Large Hadron Collider with Thermal Properties

Characterizing Proton-Proton Collisions at the Large Hadron Collider with Thermal Properties

van der Waals hadron resonance gas and QCD phase diagram

Fluidity of the system produced in relativistic pp and heavy-ion collisions: Hadron resonance gas model approach

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