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The hadronic nucleus-nucleus cross section and the nucleon size

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arxiv 2206.13522 v2 pith:FZG3CIDD submitted 2022-06-27 nucl-th hep-phnucl-ex

The hadronic nucleus-nucleus cross section and the nucleon size

classification nucl-th hep-phnucl-ex
keywords nucleonwidthcrosshadronicnucleus-nucleusobservablessectionsmaller
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 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.

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