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Title: Proton and pion transverse spectra at the BNL Relativistic Heavy Ion Collider from radial flow and finite size effects

Abstract

We show that the proton and pion transverse momentum distributions measured at BNL Relativistic Heavy Ion Collider (RHIC), for all collision centralities for pions and most of the collision centralities for protons, can be simultaneously described in terms of a thermal model with common values for the radial flow and temperature, when accounting for the finite size of the interaction region at the time of decoupling. We show that this description is obtained in terms of a simple scaling law of the size of the interaction region with the number of participants in the collision. The behavior of the proton to pion ratio at mid-rapidity can also be understood as a consequence of the strength of the radial flow and system size reached at RHIC energies.

Authors:
;  [1];  [2];  [3]
  1. Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico Distrito Federal 04510 (Mexico)
  2. Centro Brasileiro de Pesquisas Fisicas, Rua Dr. Xavier Sigaud 150-Urca CEP 22290-180, Rio de Janeiro (Brazil)
  3. Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 14-740, Mexico Distrito Federal 07000 (Mexico)
Publication Date:
OSTI Identifier:
20864225
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 74; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.74.064903; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BROOKHAVEN RHIC; DECOUPLING; DISTRIBUTION; HEAVY ION REACTIONS; HYDRODYNAMIC MODEL; PARTICLE INTERACTIONS; PARTICLE RAPIDITY; PIONS; PROTONS; SCALING LAWS; TRANSVERSE MOMENTUM

Citation Formats

Ayala, Alejandro, Cuautle, Eleazar, Magnin, J., and Montano, Luis Manuel. Proton and pion transverse spectra at the BNL Relativistic Heavy Ion Collider from radial flow and finite size effects. United States: N. p., 2006. Web. doi:10.1103/PHYSREVC.74.064903.
Ayala, Alejandro, Cuautle, Eleazar, Magnin, J., & Montano, Luis Manuel. Proton and pion transverse spectra at the BNL Relativistic Heavy Ion Collider from radial flow and finite size effects. United States. doi:10.1103/PHYSREVC.74.064903.
Ayala, Alejandro, Cuautle, Eleazar, Magnin, J., and Montano, Luis Manuel. Fri . "Proton and pion transverse spectra at the BNL Relativistic Heavy Ion Collider from radial flow and finite size effects". United States. doi:10.1103/PHYSREVC.74.064903.
@article{osti_20864225,
title = {Proton and pion transverse spectra at the BNL Relativistic Heavy Ion Collider from radial flow and finite size effects},
author = {Ayala, Alejandro and Cuautle, Eleazar and Magnin, J. and Montano, Luis Manuel},
abstractNote = {We show that the proton and pion transverse momentum distributions measured at BNL Relativistic Heavy Ion Collider (RHIC), for all collision centralities for pions and most of the collision centralities for protons, can be simultaneously described in terms of a thermal model with common values for the radial flow and temperature, when accounting for the finite size of the interaction region at the time of decoupling. We show that this description is obtained in terms of a simple scaling law of the size of the interaction region with the number of participants in the collision. The behavior of the proton to pion ratio at mid-rapidity can also be understood as a consequence of the strength of the radial flow and system size reached at RHIC energies.},
doi = {10.1103/PHYSREVC.74.064903},
journal = {Physical Review. C, Nuclear Physics},
number = 6,
volume = 74,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}