Search for narrow resonances in the b-tagged dijet mass spectrum in proton-proton collisions at √s=13  TeV

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

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Gribushin A., Klyukhin V., Kodolova O., Obraztsov S., Perfilov M., Petrushanko S.V., Savrin V., CMS Collaboration
Журнал: Physical Review D
Том: 108
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 012009
DOI: 10.1103/PhysRevD.108.012009
Аннотация: A search is performed for narrow resonances decaying to final states of two jets, with at least one jet originating from a b quark, in proton-proton collisions at √s=13 TeV. The data set corresponds to an integrated luminosity of 138 fb−1 collected with the CMS detector at the LHC. Jets originating from energetic b hadrons are identified through a b-tagging algorithm that utilizes a deep neural network or the presence of a muon inside a jet. The invariant mass spectrum of jet pairs is well described by a smooth parametrization and no evidence for the production of new particles is observed. Upper limits on the production cross section are set for excited b quarks and other resonances decaying to dijet final states containing b quarks. These limits exclude at 95% confidence level models of Z′ bosons with masses from 1.8 TeV to 2.4 TeV and of excited b quarks with masses from 1.8 TeV to 4.0 TeV. This is the most stringent exclusion of excited b quarks to date.
Добавил в систему: Клюхин Вячеслав Иванович

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Search for narrow resonances in the b-tagged dijet mass spectrum in proton-proton collisions at √s=13 TeVстатья Исследовательская статья

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