Proton-antiproton suppression in 200A GeV Au-Au collisions
Abstract
We discuss the measured nuclear suppression of p+p production in 200A GeV Au-Au collisions at the Relativistic Heavy Ion Collider (RHIC) within radiative energy loss. For the Albino-Kniehl-Kramer (AKK) set of fragmentation functions, proton production is dominated by gluons, giving rise to the expectation that the nuclear suppression for p+p should be stronger than for pions due to the stronger coupling of gluons to the quenching medium. Using a hydrodynamical description for the soft matter evolution, we show that this is indeed seen in the calculation. However, the expected suppression factors for pions and protons are sufficiently similar that a discrimination with present data is not possible. In the high p{sub T} region above 6 GeV where the contributions of hydrodynamics and recombination to hadron production are negligible, the model calculation is in good agreement with the data on p+p suppression.
- Authors:
-
- Department of Physics, P.O. Box 35, FIN-40014 University of Jyvaeskylae (Finland) and Helsinki Institute of Physics, P.O. Box 64, FIN-00014, University of Helsinki (Finland)
- Publication Date:
- OSTI Identifier:
- 21062019
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review. C, Nuclear Physics
- Additional Journal Information:
- Journal Volume: 76; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.76.027901; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANTIPROTONS; BROOKHAVEN RHIC; ENERGY LOSSES; GEV RANGE; GLUONS; GOLD 197 REACTIONS; GOLD 197 TARGET; HYDRODYNAMIC MODEL; NUCLEAR FRAGMENTATION; PARTICLE PRODUCTION; PIONS; STRONG-COUPLING MODEL; TRANSVERSE MOMENTUM
Citation Formats
Renk, Thorsten, and Eskola, Kari J. Proton-antiproton suppression in 200A GeV Au-Au collisions. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVC.76.027901.
Renk, Thorsten, & Eskola, Kari J. Proton-antiproton suppression in 200A GeV Au-Au collisions. United States. https://doi.org/10.1103/PHYSREVC.76.027901
Renk, Thorsten, and Eskola, Kari J. 2007.
"Proton-antiproton suppression in 200A GeV Au-Au collisions". United States. https://doi.org/10.1103/PHYSREVC.76.027901.
@article{osti_21062019,
title = {Proton-antiproton suppression in 200A GeV Au-Au collisions},
author = {Renk, Thorsten and Eskola, Kari J},
abstractNote = {We discuss the measured nuclear suppression of p+p production in 200A GeV Au-Au collisions at the Relativistic Heavy Ion Collider (RHIC) within radiative energy loss. For the Albino-Kniehl-Kramer (AKK) set of fragmentation functions, proton production is dominated by gluons, giving rise to the expectation that the nuclear suppression for p+p should be stronger than for pions due to the stronger coupling of gluons to the quenching medium. Using a hydrodynamical description for the soft matter evolution, we show that this is indeed seen in the calculation. However, the expected suppression factors for pions and protons are sufficiently similar that a discrimination with present data is not possible. In the high p{sub T} region above 6 GeV where the contributions of hydrodynamics and recombination to hadron production are negligible, the model calculation is in good agreement with the data on p+p suppression.},
doi = {10.1103/PHYSREVC.76.027901},
url = {https://www.osti.gov/biblio/21062019},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 76,
place = {United States},
year = {Wed Aug 15 00:00:00 EDT 2007},
month = {Wed Aug 15 00:00:00 EDT 2007}
}