https://vital.lib.tsu.ru/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000579719 Wed 23 Aug 2017 09:11:52 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001002549 gamma gamma and a -> pi(+)pi(-)pi(0) decays, and a data sample corresponding to an integrated luminosity of 168 pb -1 collected with the GlueX detector. The search for a -> gamma gamma decays is performed in the mass range of 180 < m(a) < 480 MeV, while the search for a -> pi(+)pi(-)pi(0) decays explores the 600 < m(a) < 720 MeV region. No evidence for a signal is found, and 90% confidence-level exclusion limits are placed on the a-gluon coupling strength. These constraints are the most stringent to date over much of the mass ranges considered.]]> Wed 14 Jun 2023 00:57:56 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000674754 Thu 13 Feb 2020 09:33:47 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000657165 Thu 06 Jun 2019 16:42:49 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000526579 Mon 10 Dec 2018 13:06:22 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001002117 t and c + g -> t. The analysis is based on proton-proton collision data taken at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. The data set corresponds to an integrated luminosity of 139 fb(-1). Events with exactly one electron or muon, exactly one b-tagged jet and missing transverse momentum are selected, resembling the decay products of a singly produced top quark. Neural networks based on kinematic variables differentiate between events from the two signal processes and events from background processes. The measured data are consistent with the background-only hypothesis, and limits are set on the production cross-sections of the signal processes: sigma(u + g -> t) x B(t -> Wb) x B(W -> l nu) < 3.0 pb and sigma(c + g -> t) xB(t -> Wb) xB(W -> l nu) < 4.7pb at the 95% confidence level, with B(W -> l nu) = 0.325 being the sum of branching ratios of all three leptonic decay modes of the W boson. Based on the framework of an effective field theory, the cross-section limits are translated into limits on the strengths of the tug and tcg couplings occurring in the theory: vertical bar C-uG(ut)vertical bar Lambda(2) < 0.057 TeV-2 and vertical bar C-uG(ct)vertical bar Lambda(2) < 0.14 TeV-2. These bounds correspond to limits on the branching ratios of FCNC-induced top-quark decays: B(t -> u + g) < 0.61 x 10(-4) and B(t -> c + g) < 3.7 x 10(-4).]]> Mon 05 Jun 2023 15:41:18 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000897294 Mon 04 Jul 2022 13:22:50 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000553238 Mon 03 Dec 2018 11:13:42 KRAT ]]>