TY - JOUR

T1 - Large-pT inclusive π0 production in heavy-ion collisions at RHIC and LHC

AU - Jeon, Sangyong

AU - Jalilian-Marian, Jamal

AU - Sarcevic, Ina

N1 - Funding Information:
We would like to thank P. Aurenche and J.P. Guillet for providing us with the fortran routines for calculating differential distributions for pi0 and photon production in hadronic collisions and for many useful discussions. We would like to thank D. d’Enterria and M. Tannenbaum for many helpful discussions and suggestions. We would also like to thank ITP, Santa Barbara where part of this work was done. J.J.-M. would like to thank the nuclear theory group at SUNY Stony Brook for their hospitality where part of this work was done and is grateful to LBNL nuclear theory group for the use of their computing resources. This work was 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 and by le Fonds pour la Formation de Chercheurs et l’Aide à la Recherche du Québec. 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 - 2003/8/11

Y1 - 2003/8/11

N2 - We present results for the large-pT inclusive π0 production in p-p and A-A collisions at RHIC and LHC energies. We include the full next-to-leading order radiative corrections, O(αs3), and nuclear effects such as parton energy loss and nuclear shadowing. We find the next-to-leading order corrections and the parton energy loss effect to be large and pT-dependent, while the nuclear shadowing effects are small (<10%). We calculate the ratio of prompt photons to neutral pions produced in heavy-ion collisions and show that at RHIC energies this ratio increases with pT approaching one at pT∼8 GeV, due to the large suppression of π0 production. We show that at the LHC, this ratio has a steep pT-dependence and approaches 25% effect at pT∼40 GeV. We discuss theoretical uncertainties inherent in our calculation, such as choice of the renormalization, factorization and fragmentation scales and the K-factors which signify the size of higher-order corrections.

AB - We present results for the large-pT inclusive π0 production in p-p and A-A collisions at RHIC and LHC energies. We include the full next-to-leading order radiative corrections, O(αs3), and nuclear effects such as parton energy loss and nuclear shadowing. We find the next-to-leading order corrections and the parton energy loss effect to be large and pT-dependent, while the nuclear shadowing effects are small (<10%). We calculate the ratio of prompt photons to neutral pions produced in heavy-ion collisions and show that at RHIC energies this ratio increases with pT approaching one at pT∼8 GeV, due to the large suppression of π0 production. We show that at the LHC, this ratio has a steep pT-dependence and approaches 25% effect at pT∼40 GeV. We discuss theoretical uncertainties inherent in our calculation, such as choice of the renormalization, factorization and fragmentation scales and the K-factors which signify the size of higher-order corrections.

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U2 - 10.1016/S0375-9474(03)01447-7

DO - 10.1016/S0375-9474(03)01447-7

M3 - Article

AN - SCOPUS:0038648663

VL - 723

SP - 467

EP - 482

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

IS - 3-4

ER -