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https://hdl.handle.net/11147/5018
Title: | Indications of suppression of excited? States in Pb-Pb collisions at sNN2.76 TeV | Authors: | CMS Collaboration Demir, Durmuş Ali |
Keywords: | Tellurium compounds CMS detectors Transverse momenta Pb-Pb collisions Pseudorapidities |
Issue Date: | Jul-2011 | Publisher: | American Physical Society | Source: | Chatrchyan, S, Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M.,...CMS Collaboration (2011). Indications of suppression of excited? States in Pb-Pb collisions at sNN2.76 TeV. Physical Review Letters, 107(5). doi:10.1103/PhysRevLett.107.052302 | Abstract: | A comparison of the relative yields of Υ resonances in the μ+μ- decay channel in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair of 2.76TeV is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4GeV/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)]Pb-Pb/[Υ(2S+3S)/Υ(1S) ]pp, is found to be 0.31-0.15+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%. © 2011 American Physical Society. | URI: | http://doi.org/10.1103/PhysRevLett.107.052302 http://hdl.handle.net/11147/5018 |
ISSN: | 0031-9007 1079-7114 |
Appears in Collections: | Physics / Fizik PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection Rectorate / Rektörlük Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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