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Search for supersymmetry with a compressed mass spectrum in events with a soft tau lepton, a highly energetic jet, and large missing transverse momentum in proton-proton collisions 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: 22 апреля 2020 г.
- Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Gribushin A., Klyukhin V., Kodolova O., Lokhtin I., Obraztsov S., Perfilov M., Savrin V., CMS Collaboration
- Журнал: Physical Review Letters
- Том: 124
- Номер: 4
- Год издания: 2020
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 041803
- DOI: 10.1103/physrevlett.124.041803
- Аннотация: The first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying τ lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. These event signatures are consistent with direct or indirect production of scalar τ leptons (τ~) in supersymmetric models that exhibit coannihilation between the τ~ and the lightest neutralino (χ~01), and that could generate the observed relic density of dark matter. The data correspond to an integrated luminosity of 77.2 fb−1 of proton-proton collisions at s√= 13 TeV collected with the CMS detector at the LHC in 2016 and 2017. The results are interpreted in a supersymmetric scenario with a small mass difference (Δm) between the chargino (χ~±1) or next-to-lightest neutralino (χ~02), and the χ~01. The mass of the τ~ is assumed to be the average of the χ~±1 and χ~01 masses. The data are consistent with standard model background predictions. Upper limits at 95% confidence level are set on the sum of the χ~±1, χ~02, and τ~ production cross sections for Δm(χ~±1,χ~01)= 50 GeV, resulting in a lower limit of 290 GeV on the mass of the χ~±1, which is the most stringent to date and surpasses the bounds from the LEP experiments.
- Добавил в систему: Лохтин Игорь Петрович