charged particle multiplicities
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Author(s):  
Pramod Kumar ◽  
P. K. Khandai ◽  
Kapil Saraswat ◽  
V. Singh

We present the published data of ALICE at mid-rapidity region ([Formula: see text]) to study the [Formula: see text] spectra of light-flavor hadrons in different charged-particle multiplicities ([Formula: see text]) for [Formula: see text] collisions at [Formula: see text] TeV. We parametrize the [Formula: see text] spectra of different hadrons such as pion ([Formula: see text]), kaon ([Formula: see text]), [Formula: see text], [Formula: see text] ([Formula: see text]), [Formula: see text], proton ([Formula: see text]), lambda ([Formula: see text]), cascade ([Formula: see text]) and omega ([Formula: see text]) using Tsallis distribution. We perform this analysis by considering both differential and single freeze-out scenarios. In the differential freeze-out scenario, both the Tsallis parameters [Formula: see text] and [Formula: see text] increase with charged multiplicities for most of the particles. This implies that the multipartonic interactions increase the multiplicities in [Formula: see text] collisions and it brings the system towards thermal equilibrium. Here we observe that both [Formula: see text] and [Formula: see text] have different trends with different masses of particles. The parameters [Formula: see text] and [Formula: see text] are higher for massive particles (except for multistrange baryons) in comparison to lighter ones, which supports the differential freeze-out scenario and suggests that massive particles freeze-out earlier from the system. In the case of single freeze-out scenario, the value of parameter [Formula: see text] has a little variation with multiplicity and the parameter [Formula: see text] increases with multiplicity. This implies that the degree of thermalization remains similar for the events of different multiplicity classes.


2019 ◽  
Vol 1258 ◽  
pp. 012010
Author(s):  
M. Ayaz Ahmad ◽  
Jalal Hasan Baker ◽  
Mir Hashim Rasool ◽  
Shafiq Ahmad ◽  
R. Dobra ◽  
...  

2018 ◽  
Vol 54 (1) ◽  
Author(s):  
Sh. A. Kalandarov ◽  
G. G. Adamian ◽  
N. V. Antonenko ◽  
D. Lacroix ◽  
J. P. Wieleczko

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