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Pseudorapidity distributions of charged particles in pp($$\bar p$$), p(d)A and AA collisions using Tsallis thermodynamics

Journal Article · · Journal of Physics. G, Nuclear and Particle Physics
 [1];  [2];  [2];  [2];  [3];  [4]
  1. Shaanxi Normal University, Xi'an (China); OSTI
  2. Shaanxi Normal University, Xi'an (China)
  3. Sichuan University, Chengdu (China)
  4. Texas A & M University, College Station, TX (United States); Laboratori Nazionali del Sud, INFN, Catania (Italy)
The pseudorapidity distributions of charged particles measured in p + p($$\overline{\text{p}}$$) collisions for energies ranging from $$\sqrt{{s}_{\mathrm{N}\mathrm{N}}}=23.6$$ GeV to 13 TeV and A + A collisions at RHIC and LHC are investigated in the fireball model with Tsallis thermodynamics. We assume that the rapidity axis is populated with fireballs following q-Gaussian distribution and the charged particles follow the Tsallis distribution in the fireball. We also extend the fireball model to asymmetric collision systems, i.e. d + Au collisions at $$\sqrt{{s}_{\mathrm{N}\mathrm{N}}}=200$$ GeV and p + Pb collisions at $$\sqrt{{s}_{\mathrm{N}\mathrm{N}}}=5.02$$ TeV, by taking into account the asymmetric geometry configuration. The model can fit the experimental data well for all the collision systems and centralities investigated. The collision energy and centrality dependence of the model parameters for the symmetric (asymmetric) collision system, i.e. the central position y0 (y0a, y0A) and its width σ (σa, σA) of the fireball distribution, are also investigated and discussed. Furthermore, our results suggest that the fireball model with Tsallis thermodynamics can be used as a universal framework for the pseudorapidity distributions of charged particles in high energy collisions at RHIC and LHC.
Research Organization:
Texas A & M University, College Station, TX (United States)
Sponsoring Organization:
National Natural Science Foundation of China; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
Grant/Contract Number:
FG03-93ER40773; NA0003841
OSTI ID:
1979271
Alternate ID(s):
OSTI ID: 23170304
Journal Information:
Journal of Physics. G, Nuclear and Particle Physics, Journal Name: Journal of Physics. G, Nuclear and Particle Physics Journal Issue: 10 Vol. 48; ISSN 0954-3899
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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