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Abstract
The yields, mean transverse momenta, and flow of K*0, ρ0, Λ(1520) resonances provide an evidence of a late stage hadronic rescattering in ultrarelativistic central heavy ion collisions [1]. Using hydrodynamic + hadronic afterburner simulations of Pb+Pb collisions at 5.02 TeV we achieve a reasonable description of resonance yields and spectra as a function of collision centrality. We demonstrate that the measurements of Λ(1520)’s mean transverse momentum allow to constrain the unknown branching ratios of Σ* → Λ(1520)π decays. Hadronic dynamics leads to an enhanced ∆(1232) production in central collisions.
Highlights
TeV per nucleon pair are conducted at the Large Hadron Collider
The later dilute-stage phase is modeled by a hadronic afterburner, in which hadrons undergo a chain of elastic and inelastic collisions and resonance formations and decays
If a resonance R is produced at the quarkgluon plasma hadronization, it does not necessarily survive through the hadronic rescattering
Summary
TeV per nucleon pair are conducted at the Large Hadron Collider. During a time of order 10 fm/c (= 10−22 s), these collisions create a highly compressed and heated quark-gluon plasma, which undergoes an explosive expansion, cools down, and turns into hadrons. The later dilute-stage phase is modeled by a hadronic afterburner, in which hadrons undergo a chain of elastic and inelastic collisions and resonance formations and decays. It can collide with other hadrons, forming a higher mass resonance, which may later decay into other products than original resonance (schematically R + X → R → A + B).
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