Gluino production in ultrarelativistic heavy ion collisions and nuclear shadowing

TL;DR

This paper examines how nuclear effects influence gluino production in heavy ion collisions at the LHC, focusing on nuclear ratios and their dependence on shadowing, antishadowing, and SUSY breaking scenarios.

Contribution

It provides the first detailed analysis of nuclear effects on gluino production and their impact on observable ratios, considering various SUSY scenarios.

Findings

Gluino production can be enhanced in nuclear collisions depending on nuclear effects.

Nuclear ratios are sensitive to shadowing and antishadowing in gluon distributions.

Production rates depend strongly on the chosen SUSY breaking mechanisms.

Abstract

In this article we investigate the influence of nuclear effects in the production of gluinos in nuclear collisions at the LHC, and estimate the transverse momentum dependence of the nuclear ratios $R_{pA} = {\frac{d\sigma (pA)}{dy d^2 p_T}} / A {\frac{d\sigma (pp)}{dy d^2 p_T}}$ and $R_{AA} = {\frac{d\sigma (AA)}{dy d^2 p_T}} / A^2 {\frac{d\sigma (pp)}{dy d^2 p_T}}$. We demonstrate that depending on the magnitude of the nuclear effects, the production of gluinos could be enhanced, compared to proton-proton collisions. The study of these observables can be useful to determine the magnitude of the shadowing and antishadowing effects in the nuclear gluon distribution. Moreover, we test different SPS scenarios, corresponding to different soft SUSY breaking mechanisms, and find that the nuclear ratios are strongly dependent on that choice.