# Nuclear suppression of the ϕ meson yields with large pT at the RHIC and the LHC

Dai, Wei (Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 0000 0004 1760 2614, 430079, Wuhan, China) ; Chen, Xiao-Fang (School of Physics and Electronic Engineering, Jiangsu Normal University, 0000 0000 9698 6425, 221116, Xuzhou, China) ; Zhang, Ben-Wei (Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 0000 0004 1760 2614, 430079, Wuhan, China) ; Zhang, Han-Zhong (Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 0000 0004 1760 2614, 430079, Wuhan, China) ; Wang, Enke (Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 0000 0004 1760 2614, 430079, Wuhan, China)

28 August 2017

Abstract: We calculate ϕ meson transverse momentum spectra in p+p collisions as well as their nuclear suppressions in central A+A collisions both at the RHIC and the LHC in LO and NLO with the QCD-improved parton model. We have included the parton energy loss effect in a hot/dense QCD medium with the effectively medium-modified ϕ fragmentation functions in the higher-twist approach of jet quenching. The nuclear modification factors of the ϕ meson in central Au+Au collisions at the RHIC and central Pb+Pb collisions at the LHC are provided, and nice agreement of our numerical results at NLO with the ALICE measurement is observed. Predictions of the yield ratios of neutral mesons such as ϕ/π0 , ϕ/η and ϕ/ρ0 at large pT in relativistic heavy-ion collisions are also presented for the first time.

Published in: EPJC 77 (2017) 571