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First Measurement of Λc Baryon Production in Au+Au Collisions at √sNN = 200 GeV

Adam, Jaroslav ; Galatyuk, Tetyana ; Seck, Florian
ed.: STAR Collaboration (2020)
First Measurement of Λc Baryon Production in Au+Au Collisions at √sNN = 200 GeV.
In: Physical Review Letters, 124 (17)
doi: 10.1103/PhysRevLett.124.172301
Article, Bibliographie

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+Λ−c)/(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.

Item Type: Article
Erschienen: 2020
Creators: Adam, Jaroslav ; Galatyuk, Tetyana ; Seck, Florian
Type of entry: Bibliographie
Title: First Measurement of Λc Baryon Production in Au+Au Collisions at √sNN = 200 GeV
Language: English
Date: 1 May 2020
Publisher: APS Physics
Journal or Publication Title: Physical Review Letters
Volume of the journal: 124
Issue Number: 17
DOI: 10.1103/PhysRevLett.124.172301
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+Λ−c)/(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.

Additional Information:

Art.No.: 172301

Divisions: 05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
05 Department of Physics > Institute of Nuclear Physics > Experimentelle Kernphysik
05 Department of Physics > Institute of Nuclear Physics > Experimentelle Kernphysik > Untersuchung von Quark-Materie mit virtuellen Photonen
Date Deposited: 09 Nov 2023 10:20
Last Modified: 13 Dec 2023 10:03
PPN: 51402108X
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