Measurements of Υ states production in p plus p collisions at √s=500 GeV with STAR: Cross sections, ratios, and multiplicity dependence
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00642348" target="_blank" >RIV/61389005:_____/25:00642348 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prd/abstract/10.1103/bsyx-qtjp" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/bsyx-qtjp</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/bsyx-qtjp" target="_blank" >10.1103/bsyx-qtjp</a>
Alternative languages
Result language
angličtina
Original language name
Measurements of Υ states production in p plus p collisions at √s=500 GeV with STAR: Cross sections, ratios, and multiplicity dependence
Original language description
We report measurements of Upsilon(1S), Upsilon(2S) and Upsilon(3S) production in p thorn p collisions at root sp = 500 GeV by the STAR experiment in year 2011, corresponding to an integrated luminosity Lint = 13 pb-1. The results provide precise cross sections, transverse momentum (pT) and rapidity (y) spectra, as well as cross section ratios for p(T) < 10 GeV=c and vertical bar y vertical bar < 1. The dependence of the Upsilon yield on charged particle multiplicity has also been measured, offering new insights into the mechanisms of quarkonium production. The data are compared to various theoretical models: the color evaporation model (CEM) accurately describes the Upsilon(1S) production, while the color glass condensate thorn nonrelativistic quantum chromodynamics (CGC thorn NRQCD) model overestimates the data, particularly at low p(T). Conversely, the color singlet model (CSM) underestimates the rapidity dependence. These discrepancies highlight the need for further development in understanding the production dynamics of heavy quarkonia in high-energy hadronic collisions. The trend in the multiplicity dependence is consistent with CGC/saturation and string percolation models or Upsilon production happening in multiple parton interactions modeled by PYTHIA8.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Volume of the periodical
112
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
032004
UT code for WoS article
001575564500001
EID of the result in the Scopus database
2-s2.0-105023227049