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Identified charged particle distributions in Au + Au collisions at $\sqrt{s_{N N}} = 9.2 GeV$ $\sqrt{s_{N N}} = 9.2 GeV$

Inam-ul Bashir

Department of Physics, Jamia Millia Islamia (Central University), New Delhi-110025, India

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Saeed Uddin

Department of Physics, Jamia Millia Islamia (Central University), New Delhi-110025, India

E-mail Address: saeed_jmi@yahoo.co.in

Corresponding author.

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Riyaz Ahmed Bhat

Department of Physics, Jamia Millia Islamia (Central University), New Delhi-110025, India

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, and

Waseem Bashir

Department of Physics, Jamia Millia Islamia (Central University), New Delhi-110025, India

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https://doi.org/10.1142/S0217751X15501390Cited by:6 (Source: Crossref)

Abstract

Midrapidity results on multiplicity density $d N ∕ d y$ $d N ∕ d y$ and transverse momentum distributions $E \frac{d^{3} N}{d^{3} p}$ $E \frac{d^{3} N}{d^{3} p}$ of pions, kaons and protons in Au + Au collisions at $\sqrt{s_{N N}} = 9.2 GeV$ $\sqrt{s_{N N}} = 9.2 GeV$ are reproduced by using our earlier proposed Unified Statistical Thermal Freeze-out Model (USTFM). The calculated results are found to be in fairly good agreement with the experimental data points taken from STAR experiment. Freeze-out conditions in terms of a transverse flow velocity parameter and the thermal freeze-out temperature are extracted from the fits of transverse momentum spectra of the particles at different collision centralities. A large value of midrapidity chemical potential reveals the effects of almost complete stopping in the center-of-mass frame of the system produced. The resonance decay contributions are found to have a negligible effect on the transverse momentum spectra of the particles while these are found to be significant for determining the shape of the rapidity spectra.

Keywords:

PACS: 25.75.Ag, 25.75.Ld

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