Search for heavy resonances and quantum black holes in eµ, eτ, and µτ final states in proton-proton collisions at √s = 13 TeV

Belyaev, A.V.; Boos, E.; Bunichev, V.; Dubinin, M.; Dudko, L.; Ershov, A.A.; Gribushin, A.; Klyukhin, V.; Kodolova, O.; Obraztsov, S.; Petrushanko, S.; Savrin, V.; CMS, C.

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Gribushin A., Klyukhin V., Kodolova O., Obraztsov S., Petrushanko S., Savrin V., CMS Collaboration
Журнал: Journal of High Energy Physics
Том: 2023
Номер: 5
Год издания: 2023
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 227
DOI: 10.1007/jhep05(2023)227
Аннотация: A search is reported for heavy resonances and quantum black holes decaying into eµ, eτ, and µτ ﬁnal states in proton-proton collision data recorded by the CMS experiment at the CERN LHC during 2016–2018 at √s = 13 TeV, corresponding to an integrated luminosity of 138 fb−1. The eµ, eτ, and µτ invariant mass spectra are reconstructed, and no evidence is found for physics beyond the standard model. Upper limits are set at 95% conﬁdence level on the product of the cross section and branching fraction for lepton ﬂavor violating signals. Three benchmark signals are studied: resonant τ sneutrino production in R parity violating supersymmetric models, heavy Z′ gauge bosons with lepton ﬂavor violating decays, and nonresonant quantum black hole production in models with extra spatial dimensions. Resonant τ sneutrinos are excluded for masses up to 4.2TeV in the eµ channel, 3.7TeV in the eτ channel, and 3.6TeV in the µτ channel. A Z′ boson with lepton ﬂavor violating couplings is excluded up to a mass of 5.0TeV in the eµ channel, up to 4.3TeV in the eτ channel, and up to 4.1TeV in the µτ channel. Quantum black holes in the benchmark model are excluded up to the threshold mass of 5.6TeV in the eµ channel, 5.2TeV in the eτ channel, and 5.0TeV in the µτ channel. In addition, model-independent limits are extracted to allow comparisons with other models for the same ﬁnal states and similar event selection requirements. The results of these searches provide the most stringent limits available from collider experiments for heavy particles that undergo lepton ﬂavor violating decays.
Добавил в систему: Клюхин Вячеслав Иванович

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