Measurements of the production yields of charm baryons (Λc+) and charm mesons (D0) in proton-lead collisions at a nucleon-nucleon center-of-mass energy of 8.16 TeV are presented. The data were collected in 2016 with the CMS experiment and correspond to an integrated luminosity of 186 nb−1. The Λc+ baryon is reconstructed from the decay channel Λc+→KS0p, while the D0 meson is reconstructed via D0→K−π+. The Λc+ baryon and D0 meson yields are extracted in several charged-particle multiplicity classes. No strong multiplicity dependence of the Λc+-to-D0 yield ratio is observed, unlike the observed strange baryon to strange meson yield ratio of Λ/Λ‾ to KS0, which shows a strong multiplicity dependence. This observation indicates different mechanisms for the multiplicity evolution of hadronization processes for charm and strange quarks and provides new constraints to the understanding of heavy flavor production and collectivity in small collision systems.

Multiplicity dependence of charm baryon and charm meson production in pPb collisions at sNN=8.16TeV

Bruschini, D.;Ligabue, F.;
2025

Abstract

Measurements of the production yields of charm baryons (Λc+) and charm mesons (D0) in proton-lead collisions at a nucleon-nucleon center-of-mass energy of 8.16 TeV are presented. The data were collected in 2016 with the CMS experiment and correspond to an integrated luminosity of 186 nb−1. The Λc+ baryon is reconstructed from the decay channel Λc+→KS0p, while the D0 meson is reconstructed via D0→K−π+. The Λc+ baryon and D0 meson yields are extracted in several charged-particle multiplicity classes. No strong multiplicity dependence of the Λc+-to-D0 yield ratio is observed, unlike the observed strange baryon to strange meson yield ratio of Λ/Λ‾ to KS0, which shows a strong multiplicity dependence. This observation indicates different mechanisms for the multiplicity evolution of hadronization processes for charm and strange quarks and provides new constraints to the understanding of heavy flavor production and collectivity in small collision systems.
2025
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
CMS; Hadronization
   Advanced Multi-Variate Analysis for New Physics Searches at the LHC
   AMVA4NewPhysics
   European Commission
   Horizon 2020 Framework Programme
   675440

   Search for Higgs bosons decaying to charm quarks
   HIGCC
   European Commission
   Horizon 2020 Framework Programme
   724704

   Direct and indirect searches for new physics in events with top quarks using LHC proton-proton collisions at the CMS detector
   LHCTOPVLQ
   European Commission
   Horizon 2020 Framework Programme
   752730

   Majorana neutrino discovery strategy with CMS
   MajorNet
   European Commission
   Horizon 2020 Framework Programme
   758316

   International Training Network for Statistics in High Energy Physics and Society
   INSIGHTS
   European Commission
   Horizon 2020 Framework Programme
   765710

   The strong interaction at the frontier of knowledge: fundamental research and applications
   STRONG-2020
   European Commission
   Horizon 2020 Framework Programme
   824093

   INnovative TRiggEr techniques for beyond the standard model PhysIcs Discovery at the LHC
   INTREPID
   European Commission
   Horizon Europe Framework Programme
   101115353

   Fundamental properties and time-scan of QCD matter at high densities and temperature exposed by jet substructure in heavy ion collisions with CMS experiment at the LHC
   QCDHighDensityCMS
   European Commission
   Horizon 2020 Framework Programme
   101002207
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/155063
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