TY - JOUR
T1 - The origin of large-pT π0 suppression at RHIC
AU - Jeon, Sangyong
AU - Jalilian-Marian, Jamail
AU - Sarcevic, Ina
N1 - Funding Information:
We are indebted to P. Aurenche and J.P. Guillet for providing us with the fortran routines for calculating π 0 and photon production in hadronic collisions. We thank D. d'Enterria, M. Tannenbaum and S. Mioduszewski for many helpful suggestions. I.S. is supported in part through US Department of Energy Grants Nos. DE-FG03-93ER40792 and DE-FG02-95ER40906. S.J. is supported in part by the Natural Sciences and Engineering Research Council of Canada. J.J.-M. is supported in part by a PDF from BSA and by US Department of Energy under Contract No. DE-AC02-98CH10886.
PY - 2003/6/5
Y1 - 2003/6/5
N2 - We present results for inclusive π0 production in proton-proton and in Au-Au at RHIC energy √s = 200 GeV. We use next-to-leading order perturbative QCD calculation and we include nuclear effects such as parton energy loss and nuclear shadowing. We consider the ratio of π0 distribution in Au-Au and p-p collisions for pT > 3 GeV for three cases of parton energy loss: (1) constant parton energy loss per parton scattering, εna = const, (2) Landau-Pomeranchuk-Migdal energy-dependent energy loss, εna ∼ √Ena and (3) Bethe-Heitler energy-dependent energy loss, εna ∼ Ena. We show that recently observed suppression of π0 production in Au-Au collisions at RHIC, which is found to increase with pT increasing from 3 GeV to 8 GeV, can be reproduced by εna = 0.06Ena. We show that the ratio of prompt photons to neutral pions produced in Au-Au collisions at RHIC has a strong pT dependence approaching one at pT ∼ 10 GeV.
AB - We present results for inclusive π0 production in proton-proton and in Au-Au at RHIC energy √s = 200 GeV. We use next-to-leading order perturbative QCD calculation and we include nuclear effects such as parton energy loss and nuclear shadowing. We consider the ratio of π0 distribution in Au-Au and p-p collisions for pT > 3 GeV for three cases of parton energy loss: (1) constant parton energy loss per parton scattering, εna = const, (2) Landau-Pomeranchuk-Migdal energy-dependent energy loss, εna ∼ √Ena and (3) Bethe-Heitler energy-dependent energy loss, εna ∼ Ena. We show that recently observed suppression of π0 production in Au-Au collisions at RHIC, which is found to increase with pT increasing from 3 GeV to 8 GeV, can be reproduced by εna = 0.06Ena. We show that the ratio of prompt photons to neutral pions produced in Au-Au collisions at RHIC has a strong pT dependence approaching one at pT ∼ 10 GeV.
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U2 - 10.1016/S0370-2693(03)00536-7
DO - 10.1016/S0370-2693(03)00536-7
M3 - Article
AN - SCOPUS:0038582281
SN - 0370-2693
VL - 562
SP - 45
EP - 50
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -