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Showing 1 to 20 of 30 for “"semileptonic"”.
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Four-body semileptonic decays of D mesons
Submitted by Carolyn Rauber (crauber2@illinois.edu) on 2012-01-20T18:29:01Z No. of bitstreams: 1 1993_culbertson.pdf: 4021258 bytes, checksum: 20c8b29e5b491da7cac693bfa4beef66 (MD5)
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Studies of the Semileptonic Decays of D Mesons
We present new measurements of the branching ratios and decay distributions for the decays D+ → K¯ *0ℓ+nuℓ. We observe an asymmetry in the K¯*0 angular decay distribution that we interpret as evidence for a previously unobserved s-wave K-pi+ amplitude that interferes with the …
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Search for semileptonic decays of photoproduced charmed mesons
In the broad band neutral beam at Fermi1ab, a search for photoproduction of charmed D mesons has been done using photons of 100 to 300 GeV. The reaction considered was [equation] s No statistically significant evidence for D production is observed based on the Ksnpi± mass spectrum. The sensitivity …
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Measurement of |vcb| Using the Semileptonic Decay Λb → Λcμνμ
… decay Λ0b→ Λ+c μ−νμ is presented. A sample of Λb semileptonic decays is provided by √s = 13TeV proton-proton collisions collected by the LHCb detector in 2017. Λ0b → Λ+c μ−νμX decays are identified from muon tracks, combined with a Λc baryon. The ground state Λ0b → Λ+c μ−νμ is isolated by a fit to …
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Studies of the inclusive semileptonic decays of the b-hadrons
… 1995 data-taking periods, the inclusive b-hadron semileptonic branching fraction is measured to be B R b→ℓ % =10.75+/-0.15stat +/-0.28syst -0.24+0.43model . Along with the semileptonic branching fraction, the branching fractions for the cascade mode, b→c→ℓ , and the upper-vertex …
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Determination of the CKM ratio $|V_{ub}|/|V_{cb}|$ using semileptonic $B_c^{+}$ decays at LHCb
… of the CKM ratio, $|V_{ub}|/|V_{cb}|$, using semileptonic $B_c^{+}$ decays, $\begin{align*}\frac{|V_{ub}|}{|V_{cb}|} = 0.200 \pm 0.020 \pm 0.041 \pm 0.001.\end{align*}$ In both results, the first uncertainty is statistical, the second is systematic, and the third is due to external …
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Electron Identification and Measurement of the Inclusive Semileptonic Branching Fraction of B Mesons at the BABAR Experiment
Ein Algorithmus zur Identifizierung von Elektronen mit dem BABAR Detektor wird entwickelt. Basierend auf Spuren, deren Teilchenidentität aus rein kinematischen Überlegungen gefolgert werden kann, wird für Impulse zwischen 0.5 und 2.5 GeV/c die Selektionseffizienz für Elektronen zu 90% bestimmt. Im …
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Measurement of bar{B0} Meson Properties Via Partial Reconstruction of the Decay bar{B0} -> D*+ l- ar{nu}
… of on-resonance data and the averaged B meson semileptonic branching fraction through inclusive lepton momentum spectrum obtained by previous CLEO analysis, we measure the B0 and B- semileptonic branching fraction to be (10.78 +/- 0.60 +/- 0.69)% and (10.25 +/- 0.57 +/- 0.65)% respectively, …
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Measurement and Interpretation of Moments of the Combined Hadronic Mass and Energy Spectrum in Inclusive Semileptonic B-meson Decays
… n_X^2 distribution measured in inclusive semileptonic decays of B mesons to final states containing a charm quark, B->Xc l nu. The variable n_X^2 is a combination of the invariant mass of the charmed meson m_X, its energy in the B-meson rest-frame E_X, and a constant \tilde{\Lambda} = …
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Study of electroweak WW/WZ production in the semileptonic final states in association with a high-mass dijet system using the ATLAS detector
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Measurement of the CP Asymmetry in Semimuonic B Decays Produced in Proton-Antiproton Collisions at Center of Mass Energy= 1.96 TeV
… negative same-sign muon pairs originating from semileptonic decays of pairs of B hadrons. Low transverse momentum dimuon pairs are evaluated to determine B hadron content using a log likelihood fit to two-dimensional impact parameter significance templates. Corrections are made for asymmetries …
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Measurements of the B production cross section in proton-antiproton collisions at center of mass energy = 1.96 TeV using semileptonic decays of B hadrons
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-23T19:23:46Z No. of bitstreams: 1 Kraus_James.pdf: 4874409 bytes, checksum: 74194484a218fcd4e1133aab810f8fe0 (MD5)
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Precision Lattice Calculation of Kaon Decays with Möbius Domain Wall Fermions
… a direct, precise lattice calculation of the semileptonic kaon decay K→πlν using these newly generated high quality lattice ensembles. Our main result is the form factor f^±{Kπ}(q²) evaluated directly at zero momentum transfer q²=0. Free of various systematic errors, this new result can be …
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Effective Field Theory for Doubly Heavy Baryons and Lattice QCD
… corrections to doubly heavy baryon zero-recoil semileptonic decay for both unquenched and partially quenched QCD are calculated. This theory is used to derive chiral extrapolation formulae for measurements of the doubly heavy baryon zero-recoil semileptonic decay form factors in lattice QCD …
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Probing New Physics Through Third Generation Leptons
… in terms of the neutrino mixing angles. The semileptonic decays of B meson to the τ lepton is mediated by a W boson in the SM. In many models of NP this decay gets contributions from additional states like new vector bosons, leptoquarks or new scalar particles. These new states affect the …
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Measurement of the CKM Matrix Element |Vub| with B -> rho e ny Decays at BABAR
… the CKM matrix element |Vub| is measured with semileptonic exclusive B-meson decays using approximately 55 million Upsilon(4S) -> BBbar decays collected during the years 2000 and 2001 with the BABAR detector. The result is Br(B0 -> rho- e+ nu) = (3.39 +- 0.44 +- 0.52 +- 0.60) x 10^-4, and …
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Measurement of the Partial Branching Fraction for Inclusive Semileptonic B Meson Decays to Light Hadrons B->Xu l nu and an Improved Determination of the Quark-Mixing Matrix Element |V_ub|
This thesis presents an analysis of inclusive semileptonic $B \to X_u e \nu$ decays using approximately 454 million $\Upsilon(4S) \to B \bar{B}$ decays collected during the years 1999 to 2008 with the BABAR detector. The electron energy, $E_e$, and the invariant mass squared of the …
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Measurement of the CP Violating Asymmetry a^s_sl using Bs0->(Ds->phi pi) mu nu
<p>The time-integrated measurement of the semileptonic CP violating asymmetry, as<sub>sl</sub>, with data acquired at the Large Hadron Collider with the LHCb experiment is presented. This measurement can help physicists understand some peculiarities in the Standard Model, which is the fundamental …
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Centrality Effects on Heavy-Flavor Quark Production and Invariant Yield in PHENIX Proton–Gold Collisions at Center-of-Mass Energy 200 GeV, and Assembly, Testing, Calibration, and Installation of the sPHENIX Hadronic Calorimeters
… of electron tracks to study semileptonic decays from charm and bottom hadrons, and Bayesian unfolding to separate the two flavors. Additionally, this thesis presents background and analysis of the minimum-ionizing-particles observed by the sPHENIX hadronic calorimeter during …
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