https://vital.lib.tsu.ru/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001850 Wed 31 May 2023 15:24:16 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001854 Wed 31 May 2023 15:10:16 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001058 Wed 10 May 2023 10:54:40 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001003 J/psi (mu(+)mu(-))phi(K+K-) and B+ -> J/psi(mu(+)mu(-))K+ in the transverse momentum range 7-50 GeV/c and absolute rapidity 0-2.4. The B-s(0) meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of B-s(0) and B+ is measured and compared to theoretical models that include quark recombination effects. (C) 2022 The Author(s). Published by Elsevier B.V.]]> Wed 10 May 2023 10:47:37 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000997 (J/psi -> mu(+)mu(-))mu(+)nu(mu) decay. The B-c(+) nuclear modification factor, derived from the Pb-Pb-to-pp ratio of production cross sections, is measured in two bins of the trimuon transverse momentum and of the Pb-Pb collision centrality. The B-c(+) meson is shown to be less suppressed than quarkonia and most of the open heavy-flavor mesons, suggesting that effects of the hot and dense nuclear matter created in heavy ion collisions contribute to its production. This measurement sets forth a promising new probe of the interplay of suppression and enhancement mechanisms in the production of heavy-flavor mesons in the quark-gluon plasma.]]> Wed 10 May 2023 10:47:35 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001009 e mu t) and decay (t -> e mu q) modes of the top quark through CLFV interactions, with q referring to a u or c quark. These interactions are parametrized using an effective field theory approach. With no significant excess over the standard model expectation, the results are interpreted in terms of vector-, scalar-, and tensor-like CLFV four-fermion effective interactions. Finally, observed exclusion limits are set at 95% confidence levels on the respective branching fractions of a top quark to an e mu pair and an up (charm) quark of 0.13 x 10(-6) (1.31 x 10(-6)), 0.07 x 10(-6) (0.89 x 10(-6)), and 0.25 x 10(-6) (2.59 x 10(-6)) for vector, scalar, and tensor CLFV interactions, respectively.]]> Wed 10 May 2023 10:47:35 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000699 Wed 10 May 2023 10:12:33 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000481 Hu) and 0.073% (0.051%) for B(t -> Hc). These are the strictest upper limits yet determined.]]> Wed 03 May 2023 15:09:19 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000491 Wed 03 May 2023 15:02:27 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000492 Wed 03 May 2023 15:02:24 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000480 Wed 03 May 2023 15:02:22 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000482 Wed 03 May 2023 15:02:18 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000999971 Thu 20 Apr 2023 09:07:34 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000999627 Thu 13 Apr 2023 09:49:30 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000627 WZ) = 50.6 +/- 0.8 (stat) +/- 1.5 (syst) +/- 1.1 (lumi) +/- 0.5 (theo) pb. Measurements of the fiducial and differential cross sections for several key observables are also performed in all the final-state lepton flavour and charge compositions with a total of three charged leptons, which can be electrons or muons. All results are compared with theoretical predictions computed up to next-to-next-to-leading order in quantum chromodynamics plus next-to-leading order in electroweak theory and for various sets of parton distribution functions. The results include direct measurements of the charge asymmetry and the W and Z vector boson polarization. The first observation of longitudinally polarized W bosons in WZ production is reported. Anomalous gauge couplings are searched for, leading to new constraints on beyond-the-standard-model contributions to the WZ triple gauge coupling.]]> Thu 04 May 2023 16:19:13 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000625 Thu 04 May 2023 16:19:13 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000630 p gamma gamma p with intact protons, is presented. The data correspond to an integrated luminosity of 9.4 fb(-1) collected in 2016 using the CMS and TOTEM detectors at a center-of-mass energy of 13 TeVat the LHC. Events are selected with a diphoton invariant mass above 350 GeVand with both protons intact in the final state, to reduce backgrounds from strong interactions. The events of interest are those where the invariant mass and rapidity calculated from the momentum losses of the forward-moving protons match the mass and rapidity of the central, two-photon system. No events are found that satisfy this condition. Interpreting this result in an effective dimension-8 extension of the standard model, the first limits are set on the two anomalous four-photon coupling parameters. If the other parameter is constrained to its standard model value, the limits at 95% confidence level are vertical bar zeta(1)vertical bar < 2.9 x 10(-1)3 GeV-4 and vertical bar zeta(2)vertical bar < 6.0 x 10(-13) GeV-4.]]> Thu 04 May 2023 16:19:12 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000632 Thu 04 May 2023 16:12:14 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001000304 Mon 24 Apr 2023 14:13:13 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000795385 Mon 22 Mar 2021 10:04:59 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000674594 Mon 10 Feb 2020 09:41:29 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001434 Fri 19 May 2023 14:47:59 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001383 b (b) over bar, and large missing transverse momentum. The search uses a data sample corresponding to an integrated luminosity of 137fb(-1) collected by the CMS experiment at the CERN LHC. The search is motivated by models of supersymmetry that predict the production of neutralinos, the neutral partners of the electroweak gauge and Higgs bosons. The observed event yields in the signal regions are found to be consistent with the standard model background expectations. The results are interpreted using simplified models of supersymmetry. For the electroweak production of nearly mass-degenerate higgsinos, each of whose decay chains yields a neutralino ((chi) over tilde (0)(1)) that in turn decays to a massless goldstino and a Higgs boson, (chi) over tilde (0)(1) masses in the range 175 to 1025 GeV are excluded at 95% confidence level. For the strong production of gluino pairs decaying via a slightly lighter (chi) over tilde (0)(2) to H and a light (chi) over tilde (0)(1), gluino masses below 2330 GeV are excluded.]]> Fri 19 May 2023 11:46:02 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001384 b (b) over bar WW* -> b (b) over bar lvq (q) over bar' and the dilepton decay channels HH -> b (b) over bar WW* -> b (b) over bar lvlv and HH -> b (b) over bar tau tau -> b (b) over bar lvvlvv are examined, where l in the final state corresponds to an electron or muon. The signal is extracted using a two-dimensional maximum likelihood fit of the H -> b (b) over bar jet mass and HH invariant mass distributions. No significant excess above the standard model expectation is observed in data. Model-independent exclusion limits are placed on the product of the cross section and branching fraction for narrow spin-0 and spin-2 massive bosons decaying to HH. The results are also interpreted in the context of radion and bulk graviton production in models with a warped extra spatial dimension. The results provide the most stringent limits to date for X -> HH signatures with final-state leptons and at some masses provide the most sensitive limits of all X -> HH searches.]]> Fri 19 May 2023 11:46:02 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001396 Fri 19 May 2023 11:39:05 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001394 Fri 19 May 2023 11:39:04 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001389 1 b jet and Z?? > 2 b jets are reported for the electron, muon, and combined channels. The fiducial cross sections in the combined channel are 6.52 ??? 0.04??stat?? ??? 0.40??syst?? ??? 0.14??theo?? pb for Z?? > 1 b jet and 0.65 ??? 0.03??stat?? ??? 0.07??syst?? ??? 0.02??theo?? pb for Z?? > 2 b jets. The differential cross section distributions are measured as functions of various kinematic observables that are useful for precision tests of perturbative quantum chromodynamics predictions. The ratios of integrated and differential cross sections for Z?? > 2b jets and Z?? > 1 b jet processes are also determined. The value of the integrated cross section ratio measured in the combined channel is 0.100 ??? 0.005??stat?? ??? 0.007??syst?? ??? 0.003??theo??. All measurements are compared with predictions from various event generators.]]> Fri 19 May 2023 11:39:03 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001391 Fri 19 May 2023 11:39:00 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001115 Fri 19 May 2023 10:43:05 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001110 Fri 19 May 2023 10:42:59 KRAT ]]>