Shadowing in inelastic nucleon-nucleon cross section?

Abstract

Experimental results of inclusive hard-process cross sections in heavy-ion collisions conventionally lean on a normalization computed from Glauber models where the inelastic nucleon-nucleon cross section ${\sigma }_{\mathrm{nn}}^{\mathrm{inel}}$ -- a crucial input parameter -- is simply taken from proton-proton measurements. In this letter, using the computed electro-weak boson production cross sections in lead-lead collisions as a benchmark, we determine ${\sigma }_{\mathrm{nn}}^{\mathrm{inel}}$ from the recent ATLAS data. We find a significantly suppressed ${\sigma }_{\mathrm{nn}}^{\mathrm{inel}}$ relative to what is usually assumed, show the consequences for the centrality dependence of the cross sections, and address the phenomenon in an eikonal minijet model with nuclear shadowing.

arXiv comment6 pages, 4 figures

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Cited by in corpus (11)

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• Nuclear PDFs After the First Decade of LHC Data
• NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC
• Overview of high-density QCD studies with the CMS experiment at the LHC
• Dilepton Radiation from Strongly Interacting Systems
• Constraints on the initial state of PbPb collisions via measurements of Z boson yields and azimuthal anisotropy at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Centrality dependence of electroweak boson production in PbPb collisions at the LHC
• W${}^{\pm }$-boson production in p$-$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV and PbPb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• Measurement of the inclusive isolated-photon production cross section in pp and Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Evidence of shadowing in inelastic nucleon-nucleon cross section