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Measurement of the Y(1S), Y(2S), and Y(3S) cross sections in pp collisions at sqrt(s) = 7 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 2 мая 2014 г.
- Авторы: Belyaev A., Boos E., Dubinin M., Dudko L., Ershov A., Gribushin A., Katkov I., Klyukhin V., Kodolova O., Lokhtin I., Markina A., Obraztsov S., Perfilov M., Petrushanko S., Popov A.A., Sarycheva L., Savrin V., Snigirev A., CMS Collaboration
- Журнал: Physics Letters B
- Том: 727
- Номер: 1-3
- Год издания: 2013
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 101
- Последняя страница: 125
- DOI: 10.1016/j.physletb.2013.10.033
- Аннотация: The Υ(1S), Υ(2S), and Υ(3S) production cross sections are measured using a data sample corresponding to an integrated luminosity of 35.8 ± 1.4 inverse picobarns of proton-proton collisions at s√ = 7 TeV, collected with the CMS detector at the LHC. The Upsilon resonances are identified through their decays to dimuons. Integrated over the Υ transverse momentum range pΥt< 50GeV and rapidity range |yΥ| < 2.4, and assuming unpolarized Upsilon production, the products of the Upsilon production cross sections and dimuon branching fractions are σ(pp→Υ(1S)X).B(Υ(1S)→μ+μ−)=(8.55±0.05+0.56−0.50±0.34)nb, σ(pp→Υ(2S)X).B(Υ(2S)→μ+μ−)=(2.21±0.03+0.16−0.14±0.09)nb, σ(pp→Υ(3S)X).B(Υ(3S)→μ+μ−)=(1.11±0.02+0.10−0.08±0.04)nb, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty in the integrated luminosity. The differential cross sections in bins of transverse momentum and rapidity, and the cross section ratios are presented. Cross section measurements performed within a restricted muon kinematic range and not corrected for acceptance are also provided. These latter measurements are independent of Upsilon polarization assumptions. The results are compared to theoretical predictions and previous measurements.
- Добавил в систему: Лохтин Игорь Петрович