We present the results of the combination of searches for the standard model Higgs boson produced in association with a W or Z boson and decaying into b (b) over bar using the data sample collected ...with the D0 detector in p (p) over bar collisions at root s = 1.96 TeV at the Fermilab Tevatron Collider. We derive 95% C.L. upper limits on the Higgs boson cross section relative to the standard model prediction in the mass range 100 GeV <= M-H <= 150 GeV, and we exclude Higgs bosons with masses smaller than 102 GeV at the 95% C.L. In the mass range 120 GeV <= M-H <= 145 GeV, the data exhibit an excess above the background prediction with a global significance of 1.5 standard deviations, consistent with the expectation in the presence of a standard model Higgs boson.
Numerical simulations of processes of three and four top quark hadroproduction are carried out in the SMEFT model framework. The simulated data are used to derive expected theoretical constraints on ...Wilson coefficients of relevant SMEFT operators of dimension six. Obtained limits for both cases are discussed and compared in terms of processes sensitivity to possible BSM contribution. Results show that operator \(O_{tt}^1\) is better constrained by the process of four top quark production, whereas other four operators \(O_{QQ}^1\), \(O_{Qt}^1\), \(O_{Qt}^8\) and \(O_{QQ}^8\), are similarly constrained in three and four top quark production processes. In all cases, the expected limits taken from the simultaneous analysis of the production of three and four top quarks are strengthened. The question of how kinematic cutoffs motivated by partial unitarity affect the resulting constraints on the Willson coefficients is addressed. It is shown that in all cases the limits are getting somewhat worse if the kinematic cutoffs reflecting the unitarity are applied.
We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with two or more jets using 9.7 fb super(-1) of ...Run II Fermilab Tevatron Collider data collected with the D0 detector. The analysis is sensitive to Higgs boson production via gluon fusion, associated vector boson production, and vector boson fusion, followed by the Higgs boson decay to tau lepton pairs or to W boson pairs. The ratios of 95% C.L. upper limits on the cross section times branching ratio to those predicted by the standard model are obtained for orthogonal subsamples that are enriched in either H arrow right tautau decays or H arrow right WW decays, and for the combination of these subsample limits. The observed and expected limit ratios for the combined subsamples at a Higgs boson mass of 125 GeV are 11.3 and 9.0, respectively.
Aim To assess the benefit of short-term low molecular weight heparin nadroparin compared with unfractionated heparin in unstable angina or non-Q wave myocardial infraction patients and to determine ...whether a longer, 2-week low molecular weight heparin regimen would offer additional clinical benefit. Patients, Methods and Results This was a multicentre, prospective, randomized, double-blind study in three parallel groups, involving 3468 patients. Patients received one of three treatment regimens: the unfractionated heparin group received an intravenous bolus of unfractionated heparin 5000IU, followed by an activated partial thromboplastin time adjusted infusion of unfractionated heparin for 6±2 days; the nadroparin 6 group received an intravenous bolus of nadroparin 86 anti-Xa IU.kg−1, followed by twice daily subcutaneous injections of nadroparin 86 anti-Xa IU.kg−1for 6±2 days, and the nadroparin 14 group received an intravenous bolus of nadroparin 86 anti-Xa IU.kg−1, followed by twice daily subcutaneous injections of nadroparin 86 anti-Xa IU.kg−1for 14 days. No statistically significant differences were observed between the three treatment regimens with respect to the primary outcome (cardiac death, myocardial infarction, refractory angina, or recurrence of unstable angina at day 14). The absolute differences between the groups in the incidence of the primary outcome were: −0·3% (P=0·85) for the nadroparin 6 group vs the unfractionated heparin group and +1·9% (P=0·24) for the nadroparin 14 group vs the unfractionated heparin group. Furthermore, there were no significant intergroup differences regarding any of the secondary efficacy outcomes. However, there was an increased risk of major haemorrhages in the nadroparin 14 group compared with unfractionated heparin (3·5% vs 1·6%;P=0·0035). Conclusions Treatment with nadroparin for 6±2 days provides similar efficacy and safety to treatment with unfractionated heparin, for the same period, in the therapeutic management of acute unstable angina or non-Q wave myocardial infarction, and may be easier to administer. A prolonged regimen of nadroparin (14 days) does not provide any additional clinical benefit.
We present a search for Higgs bosons in multilepton final states in pp-bar collisions at sqrt(s)=1.96 TeV recorded with the D0 detector at the Fermilab Tevatron Collider, using the full Run II data ...set with integrated luminosities of up to 9.7 fb-1. The multilepton states considered are two electron plus muon, electron with two muons, muon with two hadronic tau leptons, and like-charge electron-muon pairs. These channels directly probe the HVV (V=W,Z) coupling of the Higgs boson in production and decay. The muon with two hadronic tau lepton channel is also sensitive to H to tau lepton pair decays. Upper limits at the 95% C.L on the rate of standard model Higgs boson production are derived in the mass range 100 <= M_H <= 200 GeV. The expected and observed limits are a factor of 6.3 and 8.4 above the predicted standard model cross section at M_H=125 GeV. We also interpret the data in a fermiophobic Higgs boson model.
We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with zero, one, or two or more jets using data ...corresponding to an integrated luminosity of up to 7.3 fb(-1) collected with the D0 detector at the Fermilab Tevatron collider. The analysis is sensitive to Higgs boson production via gluon-gluon fusion, associated vector boson production, and vector boson fusion, and to Higgs boson decays to tau tau, WW, ZZ and b (b) over bar pairs. Observed (expected) limits are set on the ratio of 95% C.L. upper limits on the cross section times branching ratio, relative to those predicted by the Standard Model, of 22 (14) at a Higgs boson mass of 115 GeV and 6.8 (7.7) at 165 GeV.
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