Contribution to a conference proceedings/Internal Report

PUBDB-2015-05697

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Upsilon Production at the STAR Experiment with a Focus on New U+U Results

Vértesi, R. ; STAR Collaboration (Collaboration Author)

2014
Deutsches Elektronen-Synchrotron, DESY Hamburg

This record in other databases:    

Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-04/91

Report No.: arXiv:1410.3714

Abstract: We report recent $\Upsilon$ measurements in p+p, d+Au and Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV, and detail the analysis in U+U collisions at $\sqrt{s_{NN}}=193$ GeV. Results on \Ups production versus rapidity are consistent with pQCD predictions in p+p collisions. However, $\Upsilon$ production in mid-rapidity ($|y|${}$<$0.5) d+Au collisions is suppressed with respect to p+p collisions beyond model predictions that take into account modification of parton distribution functions and initial parton energy loss inside nuclei. The nuclear modificationfactor $R_{aa}$ shows a significant suppression in central Au+Au and U+U collisions, consistent with model calculations including color screening effects in a deconfined medium.

Keyword(s): parton: distribution function ; parton: energy loss ; color: screening ; quantum chromodynamics: perturbation theory ; Upsilon(9460): suppression ; deconfinement ; rapidity dependence ; STAR ; p p: scattering ; heavy ion: scattering ; deuteron ; gold ; uranium ; Upsilon(9460): hadroproduction ; Upsilon(9460): leptonic decay ; electron: pair production ; nuclear matter: effect ; experimental results ; Brookhaven RHIC Coll ; 193: 200 GeV-cms/nucleon

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)
2. LHC/CMS Experiment (CMS)
3. Uni Hamburg / Experimentalphysik (UNI/EXP)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

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Database coverage:

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings/Internal Report Schmidt, A. (Editor)>Extern* ; Sander, C. (Editor)DESY*
Proceedings, 20th International Conference on Particles and Nuclei (PANIC 14)
2014Panic2014, Panic2014, HamburgHamburg, Germany, 25 Aug 2014 - 29 Aug 20142014-08-252014-08-29 Hamburg : Deutsches Elektronen-Synchrotron, DESY 1-754 (2014) [10.3204/DESY-PROC-2014-04]2014     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

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