Suppression of Excited ? States Relative to the Ground State in Pb-Pb Collisions at ?sNN=5.02??TeV
Yükleniyor...
Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
Özet
The relative yields of ? mesons produced in pp and Pb-Pb collisions at ?sNN=5.02??TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, ?(2S) and ?(3S), to the ground state, ?(1S), in both Pb-Pb and pp collisions at the same center-of-mass energy. The double ratios, [?(nS)/?(1S)]Pb?Pb/[?(nS)/?(1S)]pp, are measured to be 0.308±0.055(stat)±0.019(syst) for the ?(2S) and less than 0.26 at 95% confidence level for the ?(3S). No significant ?(3S) signal is found in the Pb-Pb data. The double ratios are studied as a function of collision centrality, as well as ? transverse momentum and rapidity. No significant dependencies are observed.
Açıklama
Anahtar Kelimeler
Bottom mesons, Jets & heavy flavor physics, QCD in nuclear reactions, Quark-gluon plasma
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
PHYSICAL REVIEW LETTERS 120, 142301 (2018)
