Evidence for Modification of b Quark Hadronization in High-Multiplicity pp Collisions at s =13 TeV

(LHCb Collaboration)

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The production rate of Bs0 mesons relative to B0 mesons is measured by the LHCb experiment in pp collisions at a center-of-mass energy s=13 TeV over the forward rapidity interval 2<y<4.5 as a function of the charged particle multiplicity measured in the event. Evidence at the 3.4σ level is found for an increase of the ratio of Bs0 to B0 cross sections with multiplicity at transverse momenta below 6 GeV/c, with no significant multiplicity dependence at higher transverse momentum. Comparison with data from e+e- collisions implies that the density of the hadronic medium may affect the production rates of B mesons. This is qualitatively consistent with the emergence of quark coalescence as an additional hadronization mechanism in high-multiplicity collisions.

Original languageEnglish (US)
Article number061901
JournalPhysical Review Letters
Volume131
Issue number6
DOIs
StatePublished - Aug 11 2023

ASJC Scopus subject areas

  • General Physics and Astronomy

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