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Measurement of the exclusive Υ production cross-section in pp collisions at $ \sqrts=7 $ TeV and 8 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 марта 2016 г.
- Авторы: LHCb Collaboration, Бережной А.В., Лефлат А.К., Никитин Н.В., Саврина Д.В., Королев М.Г.
- Журнал: Journal of High Energy Physics
- Том: 9
- Год издания: 2015
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 084
- DOI: 10.1007/JHEP09(2015)084
- Аннотация: A study is presented of central exclusive production of Υ(nS) states, where the Υ(nS) resonances decay to the μ+μ− final state, using pp collision data recorded by the LHCb experiment. The cross-section is measured in the rapidity range 2<y(Υ)<4.5 where the muons are reconstructed in the pseudorapidity range 2<η(μ±)<4.5. The data sample corresponds to an integrated luminosity of 2.9 fb−1 and was collected at centre-of-mass energies of 7TeV and 8TeV. The measured Υ(1S) and Υ(2S) production cross-sections are σ(pp→pΥ(1S)p)σ(pp→pΥ(2S)p)==9.0±2.1±1.7 pb and1.3±0.8±0.3 pb, where the first uncertainties are statistical and the second are systematic. The Υ(1S) cross-section is also measured as a function of rapidity and is found to be in good agreement with Standard Model predictions. An upper limit is set at 3.4 pb at the 95\% confidence level for the exclusive Υ(3S) production cross-section, including possible contamination from χb(3P)→Υ(3S)γ decays.
- Добавил в систему: Бережной Александр Викторович