Abstract
We study the apparent discrepancy between the standard PQCD predictions for the meson and baryon ratios and multiplicities at moderate high p{sub T}>2 GeV and recent experimental measurements in Au+Au collisions at {radical}(s){sub NN}=130 GeV at the Relativistic Heavy Ion Collider (RHIC). We show that the differences, most pronounced in central collisions, can be explained by a strong non-perturbative baryon Junction component, which dominates the currently accessible experimental p{sub T} window and the non-abelian energy loss of fast partons propagating through hot and dense medium. The recently introduced two component hybrid model, which combines a quenched jet PQCD calculation in the Gyulassy-Levai-Vitev (GLV) formalism and a phenomenological 'soft' part, is further elaborated to take into account the full 3D expansion in the pre-hadronization phase and include particle flavor dependent 'soft' inverse slopes as suggested by the baryon Junction picture. We show that such approach can resolve what seems to be a factor of {approx_equal}2 difference in the moderate high p{sub T} suppression of {pi}{sup 0} and h{sup -} as recently reported by the PHENIX collaboration. The observed quenching of the high p{sub T} particle spectra and the large p-bar/{pi}{sup -} and p/{pi}{sup +} ratios as a function of p{sub T}
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Vitev, Ivan;
[1]
Gyulassy, Miklos;
[1]
Collegium Budapest, Szentharomsag u.2 H-1014 Budapest (Hungary)]
- Department of Physics, Columbia University, 538 W. 120th Street, New York, New York 10027 (United States)
Citation Formats
Vitev, Ivan, Gyulassy, Miklos, and Collegium Budapest, Szentharomsag u.2 H-1014 Budapest (Hungary)].
Anomalous anti-proton to negative pion ratio as revealed by jet quenching at RHIC.
United States: N. p.,
2002.
Web.
doi:10.1063/1.1469986.
Vitev, Ivan, Gyulassy, Miklos, & Collegium Budapest, Szentharomsag u.2 H-1014 Budapest (Hungary)].
Anomalous anti-proton to negative pion ratio as revealed by jet quenching at RHIC.
United States.
https://doi.org/10.1063/1.1469986
Vitev, Ivan, Gyulassy, Miklos, and Collegium Budapest, Szentharomsag u.2 H-1014 Budapest (Hungary)].
2002.
"Anomalous anti-proton to negative pion ratio as revealed by jet quenching at RHIC."
United States.
https://doi.org/10.1063/1.1469986.
@misc{etde_20618902,
title = {Anomalous anti-proton to negative pion ratio as revealed by jet quenching at RHIC}
author = {Vitev, Ivan, Gyulassy, Miklos, and Collegium Budapest, Szentharomsag u.2 H-1014 Budapest (Hungary)]}
abstractNote = {We study the apparent discrepancy between the standard PQCD predictions for the meson and baryon ratios and multiplicities at moderate high p{sub T}>2 GeV and recent experimental measurements in Au+Au collisions at {radical}(s){sub NN}=130 GeV at the Relativistic Heavy Ion Collider (RHIC). We show that the differences, most pronounced in central collisions, can be explained by a strong non-perturbative baryon Junction component, which dominates the currently accessible experimental p{sub T} window and the non-abelian energy loss of fast partons propagating through hot and dense medium. The recently introduced two component hybrid model, which combines a quenched jet PQCD calculation in the Gyulassy-Levai-Vitev (GLV) formalism and a phenomenological 'soft' part, is further elaborated to take into account the full 3D expansion in the pre-hadronization phase and include particle flavor dependent 'soft' inverse slopes as suggested by the baryon Junction picture. We show that such approach can resolve what seems to be a factor of {approx_equal}2 difference in the moderate high p{sub T} suppression of {pi}{sup 0} and h{sup -} as recently reported by the PHENIX collaboration. The observed quenching of the high p{sub T} particle spectra and the large p-bar/{pi}{sup -} and p/{pi}{sup +} ratios as a function of p{sub T} are found to be consistent with a creation of a deconfined phase and non-abelian energy loss of fast partons in a plasma of initial gluon rapidity density dN{sup g}/dy{approx}1000.}
doi = {10.1063/1.1469986}
journal = []
issue = {1}
volume = {610}
journal type = {AC}
place = {United States}
year = {2002}
month = {Apr}
}
title = {Anomalous anti-proton to negative pion ratio as revealed by jet quenching at RHIC}
author = {Vitev, Ivan, Gyulassy, Miklos, and Collegium Budapest, Szentharomsag u.2 H-1014 Budapest (Hungary)]}
abstractNote = {We study the apparent discrepancy between the standard PQCD predictions for the meson and baryon ratios and multiplicities at moderate high p{sub T}>2 GeV and recent experimental measurements in Au+Au collisions at {radical}(s){sub NN}=130 GeV at the Relativistic Heavy Ion Collider (RHIC). We show that the differences, most pronounced in central collisions, can be explained by a strong non-perturbative baryon Junction component, which dominates the currently accessible experimental p{sub T} window and the non-abelian energy loss of fast partons propagating through hot and dense medium. The recently introduced two component hybrid model, which combines a quenched jet PQCD calculation in the Gyulassy-Levai-Vitev (GLV) formalism and a phenomenological 'soft' part, is further elaborated to take into account the full 3D expansion in the pre-hadronization phase and include particle flavor dependent 'soft' inverse slopes as suggested by the baryon Junction picture. We show that such approach can resolve what seems to be a factor of {approx_equal}2 difference in the moderate high p{sub T} suppression of {pi}{sup 0} and h{sup -} as recently reported by the PHENIX collaboration. The observed quenching of the high p{sub T} particle spectra and the large p-bar/{pi}{sup -} and p/{pi}{sup +} ratios as a function of p{sub T} are found to be consistent with a creation of a deconfined phase and non-abelian energy loss of fast partons in a plasma of initial gluon rapidity density dN{sup g}/dy{approx}1000.}
doi = {10.1063/1.1469986}
journal = []
issue = {1}
volume = {610}
journal type = {AC}
place = {United States}
year = {2002}
month = {Apr}
}