Hadronic Nucleus-Nucleus Cross Section and the Nucleon Size
Govert Nijs, Wilke van der Schee
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.
Topics & Concepts
PhysicsHadronNucleonObservableCross section (physics)NucleusParticle physicsNuclear physicsLarge Hadron ColliderQuark–gluon plasmaQuantum mechanicsBiologyCell biologyHigh-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions