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Hadronic Nucleus-Nucleus Cross Section and the Nucleon Size.

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Even though the total hadronic nucleus-nucleus cross section is among the most fundamental observables, it has only recently been measured precisely for lead-lead collisions at the LHC. This measurement implies… Click to show full abstract

Even though the total hadronic nucleus-nucleus cross section is among the most fundamental observables, it has only recently been measured precisely for lead-lead collisions at the LHC. This measurement implies the nucleon width should be below 0.7 fm, which is in contradiction with all known state-of-the-art Bayesian estimates. We study the implications of the smaller nucleon width on quark-gluon plasma properties such as the bulk viscosity. The smaller nucleon width dramatically improves the description of several triple-differential observables.

Keywords: hadronic nucleus; cross section; nucleus cross; nucleon; nucleus nucleus; nucleus

Journal Title: Physical review letters
Year Published: 2022

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