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Study of exclusive two-photon production of W+W- in pp collisions at sqrt(s)=7 TeV and constraints on anomalous quartic gauge couplingsстатья
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: 24 октября 2013 г.
- Авторы: Belyaev A., Boos E., Dubinin M., Ershov A., Katkov I., Khein L., Klyukhin V., Kodolova O., Lokhtin I., Markina A., Obraztsov S., Petrushanko S., Popov A.A., Proskuryakov A., Savrin V., Snigirev A., CMS Collaboration
- Журнал: Journal of High Energy Physics
- Том: 2013
- Номер: 7
- Год издания: 2013
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 116
- DOI: 10.1007/JHEP07(2013)116
- Аннотация: A search for exclusive or quasi-exclusive W+W− production by photon-photon interactions, pp→p(∗)W+W−p(∗), at s√ = 7 TeV is reported using data collected by the CMS detector with an integrated luminosity of 5.05 inverse femtobarns. Events are selected by requiring a μ±e∓ vertex with no additional associated charged tracks and dilepton transverse momentum pT(μ±e∓)> 30 GeV. Two events passing all selection requirements are observed in the data, compared to a standard model expectation of 2.2±0.4 signal events with 0.84±0.15 background. The tail of the dilepton pT distribution is studied for deviations from the standard model. No events are observed with pT> 100 GeV. Model-independent upper limits are computed and compared to predictions involving anomalous quartic gauge couplings. The limits on the parameters aW0,C/Λ2 with a dipole form factor and an energy cutoff Λcutoff = 500 GeV are of the order of 10−4. A search for exclusive or quasi-exclusive W(+)W(−) production by photon-photon interactions, pp → p((*))W(+)W(−)p((*)), at TeV is reported using data collected by the CMS detector with an integrated luminosity of 5.05 fb(−1). Events are selected by requiring a μ (±)e(∓) vertex with no additional associated charged tracks and dilepton transverse momentum p (T)(μ (±)e(∓)) > 30 GeV. Two events passing all selection requirements are observed in the data, compared to a standard model expectation of 2.2 ± 0.4 signal events with 0.84 ± 0.15 background. The tail of the dilepton p (T) distribution is studied for deviations from the standard model. No events are observed with p (T) > 100 GeV. Model-independent upper limits are computed and compared to predictions involving anomalous quartic gauge couplings. The limits on the parameters with a dipole form factor and an energy cutoff Λ(cutoff) = 500 GeV are of the order of 10(−4).
- Добавил в систему: Лохтин Игорь Петрович