Production of Lambda(+)(c) baryons in proton-proton and lead-lead collisions at root S-NN=5.02 TeV

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The transverse momentum (({p}{T})) spectra of inclusively produced ({\Lambda }{c}^{+}) baryons are measured via the exclusive decay channel ({\Lambda }{c}^{+}\to p{K}^{-}{\pi }^{+}) 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 ({\Lambda }{c}^{+}) rapidity interval (|y|<1) in the ({p}{T}) range of 5–20(\phantom{\rule{0.2em}{0ex}}\text{GeV/}c) in (pp) and 10–20(\phantom{\rule{0.2em}{0ex}}\text{GeV/}c) in PbPb collisions. The observed yields of ({\Lambda }{c}^{+}) for ({p}{T}) of 10–20(\phantom{\rule{0.2em}{0ex}}\text{GeV/}c) suggest a suppression in central PbPb collisions compared to (pp) collisions scaled by the number of nucleon-nucleon (NN) interactions. The ({\Lambda }{c}^{+}/{D}^{0}) 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 ({p}_{T}) range.

CMS, Physics, Lambda(c) baryons, Nuclear modification factor, Heavy flavor, PB-PB COLLISIONS, J/PSI SUPPRESSION, RAPIDITY, Astronomy & Astrophysics, Physics, Nuclear, Physics, Particles & Fields
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Brandstetter, J., Dragicevic, M., Erö, J., Escalante Del Valle, A., Flechl, M., Frühwirth, R., Jeitler, M., Krammer, N., Krätschmer, I., Liko, D., Madlener, T., Mikulec, I., Rad, N., Schieck, J., … Woods, N. (2020). Production of Λc+ baryons in proton-proton and lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}$= 5.02 TeV. In Physics Letters B (Vol. 803, p. 135328). Elsevier BV.