Prospects for the search for gluon-mediated FCNC in top quark production with the CMS Phase-2 detector at the HL-LHC

Боос, Э.Э.; Дудко, Л.В.; Чернодед, А.И.; Перфилов, М.А.; Воротников, Г.А.; Волков, П.В.; Мандрик, П.; Мягков, И.А.; CMS, C.

Авторы: Боос Э.Э., Дудко Л.В., Чернодед А.И., Перфилов М.А., Воротников Г.А., Волков П.В., Мандрик Петр, Мягков И.А., CMS Collaboration
Журнал: CERN Document Server
Номер: CMS-PAS-FTR-18-004
Год издания: 2018
Аннотация: Prospects are presented for a search for gluon-mediated flavour-changing neutral currents in the top quark production via tug and tcg vertices using the CMS Phase-2 detector at the HL-LHC. The analysis uses Monte Carlo samples of proton-proton collisions at s√=14 TeV with a full simulation of the Phase-2 upgraded CMS detector assuming an average of 200 proton-proton interactions per bunch crossing. The final state signature of the signal is similar to that for the t-channel single top quark production in the μ/e+jets final state. Bayesian and deep learning neural networks are used to discriminate the signal events against backgrounds. The 95% C.L. expected exclusion limits on the coupling strengths are |κtug|/Λ<1.8×10−3(2.9×10−3)TeV−1 and |κtcg|/Λ<5.2×10−3(9.1×10−3)TeV−1 for integrated luminosity of 3000 fb−1(300 fb−1). The corresponding limits on branching fractions are B(t→ug)<3.8⋅10−6(9.8⋅10−6) and B(t→cg)<32⋅10−6(99⋅10−6) for integrated luminosity of 3000 fb−1(300 fb−1). Therefore, the exploitation of the full HL-LHC data set with the upgraded CMS detector will allow to improve the current limits by an order of magnitude.
Добавил в систему: Воротников Георгий Александрович

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Prospects for the search for gluon-mediated FCNC in top quark production with the CMS Phase-2 detector at the HL-LHCстатья Электронная публикация

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