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Measurements of the pp to ZZ production cross section and the Z to 4l branching fraction, and constraints on anomalous triple gauge couplings at sqrt(s) = 13 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: 17 апреля 2018 г.
- Авторы: Baskakov A., Belyaev A.V., Boos E., Dubinin M., Dudko L., Ershov A., Gribushin A., Klyukhin V., Kodolova O., Lokhtin I., Miagkov I., Obraztsov S., Petrushanko S., Popov A.A., Savin A., Savrin V., Snigirev A., CMS Collaboration
- Журнал: European Physical Journal C
- Том: 78
- Номер: 2
- Год издания: 2018
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 165
- DOI: 10.1140/epjc/s10052-018-5567-9
- Аннотация: Four-lepton production in proton-proton collisions, pp→(Z/γ∗)(Z/γ∗)→4ℓ, where ℓ=e or μ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1. The ZZ production cross section, σ(pp→ZZ)=17.2±0.5 (stat) ±0.7 (syst) ±0.4(theo)±0.4 (lum) pb, measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60<mℓ+ℓ−<120 GeV, is consistent with standard model predictions. Differential cross sections are measured and are well described by the theoretical predictions. The Z boson branching fraction to four leptons is measured to be B(Z→4ℓ)=4.8±0.2 (stat) ±0.2 (syst) ±0.1 (theo) ±0.1 (lum) ×10−6 for events with a four-lepton invariant mass in the range 80 <m4ℓ< 100 GeV and a dilepton mass mℓℓ>4 GeV for all opposite-sign, same-flavor lepton pairs. The results agree with standard model predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZγ couplings at 95% confidence level: −0.0012<fZ4<0.0010, −0.0010<fZ5<0.0013, −0.0012<fγ4<0.0013, −0.0012<fγ5<0.0013.
- Добавил в систему: Лохтин Игорь Петрович