https://vital.lib.tsu.ru/vital/access/manager/Index en-us 5 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000947 Wed 10 May 2023 10:26:37 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000386 J/psi D-s(+) and B-c(+)-> J/psi D-s*(+) decays using 139 fb(-1) of in- tegrated luminosity collected with the ATLAS detector from root s = 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the B-c(+) -> J/psi pi(+) decay are measured: B(B-c(+) -> J/psi D-s(+))/B(B-c(+) -> J/psi pi(+)) = 2.76 +/- 0.47 and B(B-c(+)-> J/psi D-s*(+))/B(B-c(+) -> J/psi pi(+)) = 5.33 +/- 0.96. The ratio of the branching fractions of the two decays is found to be B(B-c(+)-> J/psi D-s*(+))/B(B-c(+) -> J/psi D-s(+)) = 1.93 +/- 0.26. For the B-c(+)-> J/psi D-s*(+) decay, the transverse polarization fraction, Gamma(+/-+/-)/Gamma, is measured to be 0.70 +/- 0.11. The reported uncertainties include both the statistical and systematic components added in quadrature. The precision of the measurements exceeds that in all previous studies of these decays. These results supersede those obtained in the earlier ATLAS study of the same decays with root s = 7 and 8 TeV pp collision data. A comparison with available theoretical predictions for the measured quantities is presented.]]> Tue 25 Apr 2023 09:42:17 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000396 l upsilon(l)upsilon(tau)) and hadronic ( tau -> hadrons upsilon tau) decays of the tau -lepton are considered. All measurements account for the branching ratio of H -> tau tau and are performed with a requirement |yH| < 2.5, where yH is the true Higgs boson rapidity. The cross-section of the pp -> H -> tau tau process is measured to be 2.94 +/- 0.21(stat)+ 0.37 - 0.32(syst) pb, in agreement with the SM prediction of 3.17 +/- 0.09 pb. Inclusive cross-sections are determined separately for the four dominant production modes: 2.65 +/- 0.41(stat)+ 0.91 - 0.67(syst) pb for gluon-gluon fusion, 0.197 +/- 0.028(stat)+ 0.032 - 0.026(syst) pb for vectorboson fusion, 0.115 +/- 0.058(stat)+ 0.042 - 0.040(syst) pb for vector-boson associated production, and 0.033 +/- 0.031(stat)+ 0.022 - 0.017(syst) pb for top-quark pair associated production. Measurements in exclusive regions of the phase space, using the simplified template cross-section framework, are also performed. All results are in agreement with the SM predictions.]]> Tue 25 Apr 2023 09:35:14 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000150 Thu 20 Apr 2023 10:24:31 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000152 Thu 20 Apr 2023 10:24:28 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000090 Thu 20 Apr 2023 09:49:24 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000999630 Thu 13 Apr 2023 09:42:29 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000305 Mon 24 Apr 2023 14:20:16 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000306 Mon 24 Apr 2023 14:13:14 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000217 Mon 24 Apr 2023 13:52:18 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000221 c (c) over bar) process and 3.8 (4.6) standard deviations for the (W/Z)W(-> cq) process. The (WIZ)H(-> c (c) over bar) search yields an observed (expected) upper limit of 26 (31) times the predicted Standard Model crosssection times branching fraction for a Higgs boson with a mass of 125 GeV, corresponding to an observed (expected) constraint on the charm Yukawa coupling modifier vertical bar k(c)vertical bar < 8.5 (12.4), at the 95% confidence level. A combination with the ATLAS (W/Z)H, H -> b<(b)over bar> analysis is performed, allowing the ratio k(c)/k(b) to be constrained to less than 4.5 at the 95% confidence level, smaller than the ratio of the b- and c-quark masses, and therefore determines the Higgs-charm coupling to be weaker than the Higgs-bottom coupling at the 95% confidence level.]]> Mon 24 Apr 2023 13:52:14 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000998073 Mon 20 Mar 2023 15:48:23 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000998074 Mon 20 Mar 2023 15:34:15 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001393 Fri 19 May 2023 11:39:06 KRAT ]]>