Identified charged particle spectra and yields in Au + Au collisions at s N N = 200 GeV
Brookhaven National Laboratory · Joint Institute for Nuclear Research · +55 more institutions
Abstract
The centrality dependence of transverse momentum distributions and yields for pi^+/-, K^+/-, p and p^bar in Au+Au collisions at sqrt(s_NN) = 200 GeV at mid-rapidity are measured by the PHENIX experiment at RHIC. We observe a clear particle mass dependence of the shapes of transverse momentum spectra in central collisions below ~ 2 GeV/c in p_T. Both mean transverse momenta and particle yields per participant pair increase from peripheral to mid-central and saturate at the most central collisions for all particle species. We also measure particle ratios of pi^-/pi^+, K^-/K^+, p^bar/p, K/pi, p/pi and p^bar/pi as a function of p_T and collision centrality. The ratios of equal mass particle yields are independent…
Citation impact
- FWCI
- 95.06
- Percentile
- 100%
- References
- 66
Authors
326Topics & keywords
- Physics
- Computer science
Funding
- NSNational Science Foundation
- UDU.S. Department of Energy
- VUVanderbilt University
- SUState University of New York
- ACAbilene Christian University
- FDFundação de Amparo à Pesquisa do Estado de São Paulo
- NNNational Natural Science Foundation of China
- CNConselho Nacional de Desenvolvimento Científico e Tecnológico
- CNCentre National de la Recherche Scientifique
- CÀCommissariat à l'Énergie Atomique et aux Énergies Alternatives
- OOOffice of Science
- JSJapan Society for the Promotion of Science
- INInstitut National de Physique Nucléaire et de Physique des Particules
- NPNuclear Physics
- BNBrookhaven National Laboratory