Bottomonium production in heavy-ion collisions at STAR

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F16%3A00461517" target="_blank" >RIV/61389005:_____/16:00461517 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.nuclphysbps.2016.05.061" target="_blank" >http://dx.doi.org/10.1016/j.nuclphysbps.2016.05.061</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nuclphysbps.2016.05.061" target="_blank" >10.1016/j.nuclphysbps.2016.05.061</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bottomonium production in heavy-ion collisions at STAR

Popis výsledku v původním jazyce

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 root S-NN = 200 GeV central Au+Au collisions the Upsilon(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 mu b(-1) high-energy-electron triggered data in U+U collisions at root S-NN = 193 GeV. Central U+U collisions, with an estimated 20% higher energy density than that in central Au+Au data, extend the Upsilon(1S+2S+3S) and Upsilon(1S) nuclear modification trends observed in Au+Au towards higher number of participant nucleons, and confirm the suppression of the Upsilon(1S) state. We see a hint with 1.8 sigma significance that the Upsilon(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 q (q) over bar binding.

Název v anglickém jazyce

Bottomonium production in heavy-ion collisions at STAR

Popis výsledku anglicky

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 root S-NN = 200 GeV central Au+Au collisions the Upsilon(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 mu b(-1) high-energy-electron triggered data in U+U collisions at root S-NN = 193 GeV. Central U+U collisions, with an estimated 20% higher energy density than that in central Au+Au data, extend the Upsilon(1S+2S+3S) and Upsilon(1S) nuclear modification trends observed in Au+Au towards higher number of participant nucleons, and confirm the suppression of the Upsilon(1S) state. We see a hint with 1.8 sigma significance that the Upsilon(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 q (q) over bar binding.

Druh

D - Stať ve sborníku

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Nuclear and Particle Physics Proceedings

ISBN

—

ISSN

2405-6014

e-ISSN

—

Počet stran výsledku

4

Strana od-do

269-272

Název nakladatele

Elsevier Science BV

Místo vydání

Amsterdam

Místo konání akce

Montreal

Datum konání akce

29. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000379282900061