Additional $J/\Psi$ suppression from high density effects

Abstract

At high energies the saturation effects associated to the high parton density should modify the behavior of the observables in proton-nucleus and nucleus-nucleus scattering. In this paper we investigate the saturation effects in the nuclear J/Ψ production and estimate the modifications in the energy dependence of the cross section as well as in the length of the nuclear medium. In particular, we calculate the ratio of J/Ψ to Drell-Yan cross sections and show that it is strongly modified if the high density effects are included. Moreover, our results are compared with the data from the NA50 Collaboration and predictions for the RHIC and LHC kinematic regions are presented. We predict an additional J/Ψ suppression associated to the high density effects.

Towards High‐Safe Lithium Metal Anodes: Suppressing Lithium Dendrites via Tuning Surface Energy

“…[29] It is well known that the Volbmer-Weber mode for growth of polycrystalline films, which comprises the island, network, and channel stages by CVD [30] as well as particularly for plasma enhanced chemical vapor deposition (PECVD) [31] towards vertically grown materials under the condition of an electric field. As shown in Figure 4, since PECVD offers an electric field, [32] a vertical film on substrate is achieved from the cooperation of the active species (e.g., the fragment of CH 4 and CH 3 + ) and transition metal catalyst [33] (e.g., Fe, Co, Ni). The resultant products can be the vertical carbon nanotubes (Figure 4), vertical graphene sheet (Figure 4).…”

QCD at high parton density

“…Other possible approach to estimate the high density effects in nuclear J/Ψ production was recently considered in Ref. [51]. There we have assumed that the collinear factorization approach is still valid for LHC energies and included the high density effects as estimated in the parameterization proposed in Ref.…”

“…Total J/Ψ cross sections with the branching ratios to µ + µ − in AA collisions, as a function of the effective nuclear lenght L(A, B)[51].…”

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“…Refs. [16][17][18][19][20][21][22][23]). One of the nuclear effects which is expected to modify the behavior of gluon distribution is the nuclear shadowing.…”