Indications of Suppression of Excited Upsilon States in Pb-Pb Collisions at root(s)NN=2.76 TeV
Name
Paus-2011-Indications of Suppression of Excited.pdf
Size
297.16 KB
Format
Adobe PDF
Checksum (MD5)
1d89e85d4edfbfbcabe32f34d10e69d3
Author(s)
Alver, Burak Han
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Everaerts, Pieter Bruno Bart
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
July 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Indications of Suppression of Excited Υ States in Pb-Pb Collisions at sqrt[s_{NN}]=2.76 TeV.” Physical Review Letters 107 (2011): n. pag. Web. 8 Nov. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
A comparison of the relative yields of Υ resonances in the μ[superscript +]μ[superscript -] decay channel in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair of 2.76 TeV is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4 GeV/c and pseudorapidity below 2.4, the double ratio of the Υ(2S) and Υ(3S) excited states to the Υ(1S) ground state in Pb-Pb and pp collisions, [Υ(2S+3S)/Υ(1S)][subscript Pb-Pb]/[Υ(2S+3S)/Υ(1S)][subscript pp], is found to be 0.31[subscript -0.15][superscript +0.19](stat)±0.03(syst). The probability to obtain the measured value, or lower, if the true double ratio is unity, is calculated to be less than 1%.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.107.052302
