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Article Dans Une Revue Journal of High Energy Physics Année : 2020

Nuclear p$_{⊥}$-broadening of Drell-Yan and quarkonium production from SPS to LHC

Résumé

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 } $ with α = 0.25–0.30. The magnitude of the transport coefficient at x = 10$^{−2}$ is $ {\hat{q}}_0=0.051\;{\mathrm{GeV}}^2/\mathrm{fm} $ and $ {\hat{q}}_0=0.075\;{\mathrm{GeV}}^2/\mathrm{fm} $qˆ0 = 0.075 GeV$^{2}$/fm, whether $ Q\overline{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.

Dates et versions

hal-02557670 , version 1 (28-04-2020)

Identifiants

Citer

François Arleo, Charles-Joseph Naïm. Nuclear p$_{⊥}$-broadening of Drell-Yan and quarkonium production from SPS to LHC. Journal of High Energy Physics, 2020, 07, pp.220. ⟨10.1007/JHEP07(2020)220⟩. ⟨hal-02557670⟩
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