کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5494856 | 1528786 | 2017 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Suppression of Ï(1S), Ï(2S), and Ï(3S) quarkonium states in PbPb collisions at sNN=2.76TeV
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
The production yields of Ï(1S), Ï(2S), and Ï(3S) quarkonium states are measured through their decays into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon pair of 2.76âTeV. The data correspond to integrated luminosities of 166μbâ1 and 5.4pbâ1 for PbPb and pp collisions, respectively. Differential production cross sections are reported as functions of Ï rapidity y up to 2.4, and transverse momentum pT up to 20GeV/c. A strong centrality-dependent suppression is observed in PbPb relative to pp collisions, by factors of up to â2 and 8, for the Ï(1S) and Ï(2S) states, respectively. No significant dependence of this suppression is observed as a function of y or pT. The Ï(3S) state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated data by at least a factor of â7 at a 95% confidence level. The observed suppression is in agreement with theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 770, 10 July 2017, Pages 357-379
Journal: Physics Letters B - Volume 770, 10 July 2017, Pages 357-379