English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Strange hadron production in Au+Au collisions at sqrt{s_NN} = 7.7, 11.5, 19.6, 27, and 39 GeV

STAR Collaboration, Adam, J., Schmitz, N., Seyboth, P., & et al. (2020). Strange hadron production in Au+Au collisions at sqrt{s_NN} = 7.7, 11.5, 19.6, 27, and 39 GeV. Physical Review C, 102, 034909. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2020-278.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
STAR Collaboration1, Author
Adam, J.1, Author
Schmitz, N.1, Author
Seyboth, P.1, Author
et al.1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

Content

show
hide
Free keywords: STAR
 Abstract: We present STAR measurements of strange hadron (mathrm{K}^{0}_{\mathrm S}, Lambda, \overline{\Lambda}, \Xi^-, \overline{\Xi}^+, \Omega^-, \overline{\Omega}^+, and \phi) production at mid-rapidity (|y| < 0.5) in Au+Au collisions at sqrt{s_NN} = 7.7 - 39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios (\overline{\Lambda}/\Lambd, \overline{\Xi}^+/\Xi^-, \overline{\Omega}^+/\Omega^-) are presented as well, and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out (\mu_{B}/T_{\rm ch} and \mu_{S}/T_{\rm ch}) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors (R_{\textrm{CP}}) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The \mathrm{K}^{0}_{\mathrm S} R_{\textrm{CP}} shows no suppression for p_{\rm T} up to 3.5 \mathrm{GeV} / c at energies of 7.7 and 11.5 GeV. The \overline{\Lambda}/\mathrm{K}^{0}_{\mathrm S} ratio also shows baryon-to-meson enhancement at intermediate p_{\rm T} (\approx2.5 \mathrm{GeV} / c) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV.

Details

show
hide
Language(s):
 Dates: 2020
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review C
  Abbreviation : Phys.Rev.C
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 102 Sequence Number: - Start / End Page: 034909 Identifier: -