Bottomonium production in heavy-ion collisions at STAR

for the STAR Collaboration

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Bottomonium measurements provide unique insight into hot and cold nuclear matter effects present in the medium that is formed in high-energy heavy-ion collisions. Recent STAR results show that in sNN=200 GeV central Au+Au collisions the Υ(1S) state is suppressed more than the case that if only cold nuclear matter effects were present, and the excited state yields are consistent with a complete suppression. In 2012, STAR also collected 263.4 μb-1 high-energy-electron triggered data in U+U collisions at √sNN = 193 GeV. Central U+U collisions, with an estimated 20% higher energy density than that in central Au+Au data, extend the Υ(1S+2S+3S) and Υ(1S) nuclear modification trends observed in Au+Au towards higher number of participant nucleons, and confirm the suppression of the Υ(1S) state. We see a hint with 1.8 σ significance that the Υ(2S+3S) excited states are not completely suppressed in U+U collisions. These data support the sequential in-medium quarkonium dissociation picture and favor models with a strong qq binding.

Original languageEnglish
Pages (from-to)269-272
Number of pages4
JournalNuclear and Particle Physics Proceedings
Volume276-278
DOIs
Publication statusPublished - Jul 1 2016

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ionic collisions
collisions
retarding
nucleons
high energy electrons
excitation
flux density
dissociation
trends
energy

Keywords

  • Brookhaven RHIC Coll
  • Quark gluon
  • Quarkonium

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Bottomonium production in heavy-ion collisions at STAR. / for the STAR Collaboration.

In: Nuclear and Particle Physics Proceedings, Vol. 276-278, 01.07.2016, p. 269-272.

Research output: Contribution to journalArticle

for the STAR Collaboration. / Bottomonium production in heavy-ion collisions at STAR. In: Nuclear and Particle Physics Proceedings. 2016 ; Vol. 276-278. pp. 269-272.
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