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Showing 1 to 14 of 14 for “"b-Quark"”.
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Semi-Leptonic Decay Of Lambda-B In The Standard Model And With New Physics
Heavy quark decays provide a very advantageous investigation to test the Standard Model (SM). Recently, promising experiments with b quark, as well as the analysis of the huge data sets produced at the B factories, have led to an increasing study and sensitive measurements of relative b quark …
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A measurement of B⁰ anti-B⁰ oscillations using fully-reconstructed hadronic B decays at BaBar
… the correlations between the flavor of the b quark and the charges of its decay products. By fitting the decay-time distribution of the observed mixed and unmixed final states, the oscillation frequency, [Delta]md, is determined to be 0.516 +/- 0.016 (stat.) +/- 0.010 (syst.) ps-l.
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A Search For Wino Pair Production With B − L R-Parity Violating Chargino Decay To A Trilepton Resonance With The Atlas Experiment
… are presented for pair production of scalar top quarks (stops) which subsequently decay to a b-quark and a charged lepton. Limits are set as a function of the stop decay rate to each lepton flavor. The first analysis, performed with 20.3 fb−1 of √s = 8 TeV data, sets limits on the stop mass …
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A search for the lightest supersymmetric partner of the top quark at DO
… of the light supersymmetric partner of the top quark (t˜1) in 5.4+/-0.3 fb-1 of data from the DO detector at a pp¯ center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider. The scalar top quarks are assumed to decay into a b quark, a charged lepton and a scalar neutrino ( …
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Studies of the inclusive semileptonic decays of the b-hadrons
… the correlation of the electric charge of the b-quark to that of the lepton is utilized to isolate different decay modes of the b-hadrons, is presented. Using the data collected by the DELPHI detector during the 1994 and 1995 data-taking periods, the inclusive b-hadron semileptonic branching …
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Observation of the Ξ_b^-→Λ_b^0 π^- decay and measurement of B(Ξ_b^-→Λ_b^0 π^-)
… of Ξ−b decay width that only considers b-quark decay, this contribution must be added, thus increasing predictions of the Ξ−b decay width by about 1%
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Searches for Vector Like Quarks Decaying to Ht, Zt, or Wt in the Single Lepton Channel with the ATLAS Detector
<p>A search for single production of Vector-Like quarks decaying to the Higgs boson and a top quark, or a massive vector boson and a top quark is presented. Events with exactly one high momentum lepton, at least three hadronic jets, of which at least one originates from a b-quark, and large missing …
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Electroweak physics and evidence for a Higgs boson decaying to a pair of tau leptons with the CMS detector
… to a pair of tau leptons in gluon-fusion and b-quark associated production modes with no observation of a significant excess. In addition, the feasibility of measuring the standard model Higgs boson self-coupling with an expected data sample corresponding to an integrated luminosity of 3000 fb-1 …
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Search for Anomalous Production of Single Top Quarks with the H1 Experiment at HERA
Eine Suche nach der Produktion einzelner Top-Quarks durch flavor-ändernde neutrale Ströme in ep-Kollisionen wird vorgestellt. Die Suche ist motiviert durch die Beobachtung von Ereignissen mit dem H1-Detektor, die ein isoliertes Lepton sowie einen hohen fehlenden und einen hohen hadronischen …
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Weak decays of beautiful pseudoscalar mesons with Lattice Quantum Chromodynamics
… associated with the large mass of valence $b$ quarks to study a selection of decays of $B$ mesons with Lattice Quantum Chromodynamics. After introducing these modern methods, I report on my progress on calculating the vector current form factors for $B_c \to D_s$. This decay is allowed at the …
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Testing the Standard Model with Top-Quark Production
Now that the existence of the top quark is firmly established, attention turns to measuring its properties. Because of its large mass, the top quark may be sensitive to physics beyond the standard model. A promising candidate for this new physics is supersymmetry. Hence, we calculate the …
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The application of automated perturbation theory to lattice QCD
Predictions of heavy quark parameters are an integral component of precision tests of the Standard Model of particle physics. Experimental measurements of electroweak processes involving heavy hadrons provide stringent tests of Cabibbo-Kobayashi-Maskawa (CKM) matrix unitarity and serve as a probe …
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Three loop corrections to electroweak precision observables in the large Higgs mass limit
… <br>The direct observation of the predicted top quark at the proton-antiproton <br>collider Tevatron at Fermilab in 1994 with a mass determination <br>(now at m_t= 174.3+- 3.4 GeV) that impressively <br>matches the mass range indirectly obtained via the radiative corrections calculated in the …
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Studies of b-associated production and muonic decays of neutral Higgs bosons at the ATLAS experiment within the Minimal Supersymmetric Standard Model
This thesis presents a Monte Carlo study of neutral Higgs bosons of the Minimal Supersymmetric Standard Model (MSSM) decaying into muons at the Atlas experiment at the CERN Large Hadron Collider. Signal and background processes are simulated using novel Monte Carlo generators that incorporate parts …