Production of Λc + baryons in proton-proton and lead-lead collisions at s NN =5.02TeV

The CMS Collaboration

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The transverse momentum (pT) spectra of inclusively produced Λc + baryons are measured via the exclusive decay channel Λc +→pKπ+ using the CMS detector at the LHC. Spectra are measured as a function of transverse momentum in proton-proton (pp) and lead-lead (PbPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The measurement is performed within the Λc + rapidity interval |y|<1 in the pT range of 5–20GeV/c in pp and 10–20GeV/c in PbPb collisions. The observed yields of Λc + for pT of 10–20GeV/c suggest a suppression in central PbPb collisions compared to pp collisions scaled by the number of nucleon-nucleon (NN) interactions. The Λc +/D0 production ratio in pp collisions is compared to theoretical models. In PbPb collisions, this ratio is consistent with the result from pp collisions in their common pT range.

Original languageEnglish
Article number135328
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2020 Apr 10

Bibliographical note

Publisher Copyright:
© 2020 The Author(s)


  • CMS
  • Heavy flavor
  • Lambda(c) baryons
  • Nuclear modification factor
  • Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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