Production of Λ c + baryons in proton-proton and lead-lead collisions at √ s NN = 5.02 TeV
Author(s)
The CMS Collaboration; Abercrombie, Daniel Robert; Allen, Branden; Baty, Austin Alan; Bi, Ran; Brandt, Stephanie Akemi; Busza, Wit; Cali, Ivan Amos; D'Alfonso, Mariarosaria; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Harris, Philip Coleman; Hsu, David; Hu, Miao; Klute, Markus; Kovalskyi, Dmytro; Lee, Y.-J.; Luckey Jr, P David; Maier, Benedikt; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, S.; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof E; Roland, Gunther M; Shi, Z.; Stephans, George S. F.; Sumorok, Konstanty C; Tatar, Kaya; Velicanu, Dragos Alexandru; Wang, J.; Wang, T. W.; Wyslouch, Boleslaw; ... Show more Show less
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© 2020 The Author(s) 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.
Date issued
2020Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. Department of Aeronautics and AstronauticsJournal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV