Measurements of the ϒ(1S), ϒ(2S), and ϒ(3S) differential cross sections in pp collisions at s=7TeV
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı Physics Letters Section B Nuclear Elementary Particle and High Energy Physics
Dergi ISSN 0370-2693 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 10-2015
Cilt / Sayı / Sayfa 749 / 1 / 14–34 DOI 10.1016/j.physletb.2015.07.037
Makale Linki https://www.sciencedirect.com/science/article/pii/S037026931500547X/pdfft?md5=5388dfa3d2d6a061449a4d1306884c7d&pid=1-s2.0-S037026931500547X-main.pdf
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
Differential cross sections as a function of transverse momentum p T are presented for the production of ϒ (n S)(n= 1, 2, 3) states decaying into a pair of muons. Data corresponding to an integrated luminosity of 4.9 fb− 1 in pp collisions at s= 7 TeV were collected with the CMS detector at the LHC. The analysis selects events with dimuon rapidity| y|< 1.2 and dimuon transverse momentum in the range 10< p T< 100 GeV. The measurements show a transition from an exponential to a power-law behavior at p T≈ 20 GeV for the three ϒ states. Above that transition, the ϒ (3 S) spectrum is significantly harder than that of the ϒ (1 S). The ratios of the ϒ (3 S) and ϒ (2 S) differential cross sections to the ϒ (1 S) cross section show a rise as p T increases at low p T, then become flatter at higher p T.
Anahtar Kelimeler
B-Physics | CMS | Cross section | Upsilon