Production of Λc+ Baryons in Proton-Proton and Lead-Lead Collisions at √sNN = 5.02 TeV

Physics Letters B 2020
Viesturs Veckalns

The transverse momentum (pT) spectra of inclusively produced Λc+ baryons are measured via the exclusive decay channel Λc+→pK−π+ 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.

Keywords
CMS | Heavy flavor | Lambda(c) baryons | Nuclear modification factor | Physics
DOI
10.1016/j.physletb.2020.135328
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0370269320301325?via%3Dihub

Veckalns, V., CERN international group of authors. Production of Λc+ Baryons in Proton-Proton and Lead-Lead Collisions at √sNN = 5.02 TeV. Physics Letters B, 2020, Vol. 803, Article number 135328. ISSN 0370-2693. Available from: doi:10.1016/j.physletb.2020.135328

Publication language
English (en)