Measurement Of B0s Meson Production İn Pp And PbPb Collisions At ?Snn=5.02 TeV
Yükleniyor...
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
The CMS Collaboration
Erişim Hakkı
Özet
The production cross sections of B0smesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel B0s?J/????+??K+K?at a center-of-mass energy of 5.02TeV per nucleon pair and within the rapidity range |y| <2.4using the CMS detector at the LHC. The pp measurement is performed as a function of transverse momentum (pT) of the B0smesons in the range of 7 to 50GeV/cand is compared to the predictions of perturbative QCD calculations. The B0sproduction yield in PbPb collisions is measured in two pTintervals, 7 to 15 and 15 to 50GeV/c, and compared to the yield in pp collisions in the same kinematic region. The nuclear modification factor (RAA) is found to be 1.5 ±0.6(stat) ±0.5(syst)for 7–15GeV/c, and 0.87 ±0.30(stat) ±0.17(syst)for 15–50GeV/c, respectively. Within current uncertainties, the B0sresults are consistent with models of strangeness enhancement, and suppression by parton energy loss, as observed for the B+mesons
Açıklama
Anahtar Kelimeler
Physics, Quark gluon plasma, B meson, Open heavy-flavor
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
Physics Letters B 796(2019)168–190
