https://vital.lib.tsu.ru/vital/access/manager/Index en-us 5 Measurement of Higgs boson decay into b-quarks in associated production with a top-quark pair in pp collisions at s√ = 13 TeV with the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001051 Wed 10 May 2023 10:54:35 KRAT ]]> Search for associated production of a Z boson with an invisibly decaying Higgs boson or dark matter candidates at √s = 13 TeV with the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001004 Wed 10 May 2023 10:47:31 KRAT ]]> Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb−1 of pp collision data at √s = 13 TeV https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001002365 XX/ZX 4l, where the new boson X has a mass between 1 and 60 GeV. The search uses pp collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 139 fb(-1) at a centre-of-mass energy root s = 13 TeV. The data are found to be consistent with Standard Model expectations. Limits are set on fiducial cross sections and on the branching ratio of the Higgs boson to decay into XX/ZX, improving those from previous publications by a factor between two and four. Limits are also set on mixing parameters relevant in extensions of the Standard Model containing a dark sector where X is interpreted to be a dark boson.]]> Wed 07 Jun 2023 15:15:33 KRAT ]]> Measurements of Higgs boson production cross-sections in the H → τ +τ − decay channel in pp collisions at √s = 13 TeV with the ATLAS detector 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 ]]> Search for Higgs boson pair production in the two bottom quarks plus two photons final state in pp collisions at √s=13 TeV with the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000999630 Thu 13 Apr 2023 09:42:29 KRAT ]]> Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at √s=13 TeV https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001004018 aa, where one a-boson decays into a b-quark pair and the other into a muon pair. The search uses 139 fb(-1) of proton-proton collision data at a center-of-mass energy root s = 13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. A narrow dimuon resonance is searched for in the invariant mass spectrum between 16 GeV and 62 GeV. The largest excess of events above the Standard Model backgrounds is observed at a dimuon invariant mass of 52 GeV and corresponds to a local (global) significance of 3.3 sigma (1.7 sigma). Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to the bb mu mu final state, beta(H -> aa -> bb mu mu), and are in the range 0.2-4.0 x 10(-4), depending on the signal mass hypothesis.]]> Mon 26 Jun 2023 16:24:43 KRAT ]]> Measurements of the Higgs boson inclusive and differential fiducial cross-sections in the diphoton decay channel with pp collisions at √s = 13 TeV with the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000305 Mon 24 Apr 2023 14:20:16 KRAT ]]> Search for invisible Higgs-boson decays in events with vector-boson fusion signatures using 139 fb−1 of proton-proton data recorded by the ATLAS experiment https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000217 Mon 24 Apr 2023 13:52:18 KRAT ]]> Search for resonant pair production of Higgs bosons in the b¯bb¯b final state using pp collisions at √s=13 TeV with the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001431 Fri 19 May 2023 14:48:00 KRAT ]]> Search for single production of a vectorlike T quark decaying into a Higgs boson and top quark with fully hadronic final states using the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001393 Fri 19 May 2023 11:39:06 KRAT ]]> Constraints on Higgs boson production with large transverse momentum using H→b¯b decays in the ATLAS detector https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001392 b (b) over bar process. The 95% confidence-level upper limit on the cross section for Higgs boson production with transverse momentum above 450 GeV is 115 fb, and above 1 TeV it is 9.6 fb. The Standard Model cross section predictions for a Higgs boson with a mass of 125 GeV in the same kinematic regions are 18.4 fb and 0.13 fb, respectively.]]> Fri 19 May 2023 11:39:05 KRAT ]]>