Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at √s=13TeV / A. M. Sirunyan, A. R. Tumasyan, W. Adam [et al.]
Уровень набора: European Physical Journal CЯзык: английский.Резюме или реферат: A search for the pair production of heavy vector-like partners TT and BB of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton-proton collisions at s√=13TeVs=13TeV. The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9fb−1fb−1. Final states studied for TT¯TT¯ production include those where one of the TT quarks decays via T→tZT→tZ and the other via T→bWT→bW, tZtZ, or tHtH, where HH is a Higgs boson. For the BB¯BB¯ case, final states include those where one of the BB quarks decays via B→bZB→bZ and the other B→tWB→tW, bZbZ, or bHbH. Events with two oppositely charged electrons or muons, consistent with coming from the decay of a ZZ boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the TT and BB quarks for a range of branching fractions. Assuming 100% branching fractions for T→tZT→tZ, and B→bZB→bZ, TT and BB quark mass values below 1280 and 1130GeVGeV, respectively, are excluded..Примечания о наличии в документе библиографии/указателя: [References: 75 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | hadron-hadron scattering (experiments) | адрон-адронные столкновения | beyond standard model | Higgs physics Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: 75 tit.]
A search for the pair production of heavy vector-like partners TT and BB of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton-proton collisions at s√=13TeVs=13TeV. The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9fb−1fb−1. Final states studied for TT¯TT¯ production include those where one of the TT quarks decays via T→tZT→tZ and the other via T→bWT→bW, tZtZ, or tHtH, where HH is a Higgs boson. For the BB¯BB¯ case, final states include those where one of the BB quarks decays via B→bZB→bZ and the other B→tWB→tW, bZbZ, or bHbH. Events with two oppositely charged electrons or muons, consistent with coming from the decay of a ZZ boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the TT and BB quarks for a range of branching fractions. Assuming 100% branching fractions for T→tZT→tZ, and B→bZB→bZ, TT and BB quark mass values below 1280 and 1130GeVGeV, respectively, are excluded.
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