Nuclear p⊥-broadening of Drell-Yan and quarkonium production from SPS to LHC

Author:

Arleo FrançoisORCID,Naïm Charles-Joseph

Abstract

Abstract The nuclear p-broadening of Drell-Yan and quarkonium (J/ψ, Υ) production in πA and pA collisions is investigated. The world data follow a simple scaling from SPS to LHC energies, once the process-dependent color factors are properly taken into account, which allows for the extraction of the transport coefficient in cold nuclear matter. We find that $$ \hat{q}(x)\propto {x}^{-\alpha } $$ q ̂ x x α with α = 0.25–0.30. The magnitude of the transport coefficient at x = 102 is $$ {\hat{q}}_0=0.051\;{\mathrm{GeV}}^2/\mathrm{fm} $$ q ̂ 0 = 0.051 GeV 2 / fm and $$ {\hat{q}}_0=0.075\;{\mathrm{GeV}}^2/\mathrm{fm} $$ q ̂ 0 = 0.075 GeV 2 / fm qˆ0 = 0.075 GeV2/fm, whether $$ Q\overline{Q} $$ Q Q ¯ pairs are assumed to be produced as color octet or color singlet states, respectively. The relation between nuclear broadening data and the (CT14) gluon density is also investigated.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

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