Observation of enhancement of charmed baryon-to-meson ratio in Au+Au collisions at sNN = 200 GeV

STAR Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the first measurement of the charmed baryon Λ±c production at midrapidity (|y| < 1) in Au+Au collisions at sNN = 200 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider. The Λc/D0 (denoting (Λ+c + Λc )/(D0 + D0)) yield ratio is measured to be 1.08 ± 0.16 (stat.) ± 0.26 (sys.) in the 0-20% most central Au+Au collisions for the transverse momentum (pT) range 3 < pT < 6 GeV/c. This is significantly larger than the PYTHIA model calculations for p + p collisions. The measured Λc/D0 ratio, as a function of pT and collision centrality, is comparable to the baryon-to-meson ratios for light and strange hadrons in Au+Au collisions. Model calculations including coalescence hadronization for charmed baryon and meson formation reproduce the features of our measured Λc/D0 ratio.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Oct 31 2019

All Science Journal Classification (ASJC) codes

  • General

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