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Showing 1 to 20 of 21 for “"CKM Matrix"”.
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Measurement of the CKM Matrix Element |Vub| with B -> rho e ny Decays at BABAR
… fraction for B -> rho e nu decays and 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) = …
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Messung der Betaasymmetrie A im Neutronenzerfall
… Lebensdauer tau des Neutrons auf V_ud, das erste Matrixelement der CKM-Matrix zugegriffen werden. Mit Kenntnis von V_ud und V_us kann die CKM-Matrix auf Unitarität überprüft werden.
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B [right arrow] ([rho]/[omega]) [gamma] at BaBar
… fractions of the decays ... the ratio of CKM-matrix elements Vtd=Vts are extracted and the length of the far side of the unitarity triangle is determined.
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Analysis of B Meson Decays to Three Charged Pions
… dependence on the complex quark couplings in the CKM matrix. They also test dynamical models for hadronic B decays. Based on a sample of 772 million BB pairs collected by the Belle experiment, we present a study of direct CP violation in the decay of charged B to three charged pions.
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Lattice QCD calculations of Kl3 and pion form factors using partially twisted boundary conditions
… of the |V<sub>us</sub>| element of the CKM matrix. An accurate determination of these form factors is therefore important. Using partially twisted boundary conditions we calculate the K<sub>l3</sub> form factor directly at q<sup>2</sup> = 0, removing the need for the q<sup>2</sup> …
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Polarized Ultracold Neutrons: their transport in diamond guides and potential to search for physics beyond the standard model
… element (Vud) of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix. The CKM matrix is a unitary transform between the mass and weak eigenstates of the d, s and b quarks; if the matrix is not unitary this would imply that the Standard Model is not complete. Currently the first row of the CKM …
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Measurement of the single top quark cross section in the lepton plus jets final state in proton-antiproton collisions at a center of mass energy of 1.96 TeV using the CDF II detector.
… = 172.5 GeV/c^2. In addition, we extract the CKM matrix element value |Vtb| = 0.96 ± 0.09 (stat. + syst.) ± 0.05 (theory) and set a lower limit of |Vtb| > 0.78 at the 95% credibility level.
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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
… as a constraint on the complex phase of the CKM matrix element Vts by using the B0 neutral mixing contribution measured at the B factories. We measure the CP violating asymmetry from Bs mixing to be AsSL = 0.020 +/- 0.028.
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Observation of b → dγ decays and determination of |V<sub>td</sub>/V<sub>ts</sub>|
… This result is used to determine the ratio of CKM matrix elements, |V<sub>td</sub>/V<sub>ts</sub>| = 0.199 <sub>−0.025</sub><sup>+0.026</sup><sub>−0.015</sub><sup>0.018</sup>.
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Measurement of single-top T-channel production using ATLAS data
… to determine the measured cross-section and the CKM matrix element |Vtb|. The cross-section for top and anti-top production is considered separately and the resulting cross-sections are σ t+ = 59 +18 -16 pb for the positive charge channel and σ t- = 33 +13 -12 pb for the negative …
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Moments of parton distribution amplitudes and structure functions for the light mesons from lattice QCD
… calculation of weak physics parameters, such as CKM matrix elements and CP violating phases. We are able to calculate moments of the PDAs on the lattice using two point correlation functions of local operators. This calculation extracts the first two moments for the light mesons and is performed …
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The laser mirror alignment system for the LHCb RICH detectors
… constrain the Cabibbo-Kobayashi-Maskawa (CKM) matrix measurements with unprecedented accuracy, as well as search for new physics. The success of the LHCb experiment relies upon excellent particle identification. The central particle identification detectors for the LHCb experiment are the …
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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|
… statistical and systematic, respectively. The CKM matrix element $|V_{ub}|$ is determined from the measured $\Delta \tilde{\BR}$ using theoretical calculation based on Heavy Quark Expansion. The result is $|V_{ub}| = (4.19 \pm 0.18{}^{+0.26}_{-0.20} {}^{+0.26}_{-0.25}) \times 10^{-3}, where the …
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The mass of 22^Mg and a concept for a novel laser ion source trap
… hypothesis and the Cabibbo-Kobayashi-Maskawa(CKM) matrix unitarity, both being predictions of the Standard Model. Second, to calculate the reaction rate of 21^Na(p,gamma)22^Mg the involved masses are required very accurately. This rate is needed in order to extract an upper limit on the amount …
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B → K∗µ+µ− and Form Factors for Semi-Leptonic and Radiative B Decays
… LCSR, allowing an improved determination of the CKM matrix element |Vub |.
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Precision Lattice Calculation of Kaon Decays with Möbius Domain Wall Fermions
… this new result can be used to determine the CKM matrix element Vus to a very high precision when combined with experimental input. The calculation also provides results for various low energy strong interaction constants such as the pseudoscalar decay constants f_K and f_π, and the neutral …
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The application of automated perturbation theory to lattice QCD
… stringent tests of Cabibbo-Kobayashi-Maskawa (CKM) matrix unitarity and serve as a probe of new physics. Hadronic matrix elements parameterise the strong dynamics of these interactions and these matrix elements must be calculated nonperturbatively. Lattice quantum chromodynamics (QCD) provides …
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Measurement and Interpretation of Moments of the Combined Hadronic Mass and Energy Spectrum in Inclusive Semileptonic B-meson Decays
This thesis presents first measurements of moments of the hadronic 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 …
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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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A search for CP violation in and a Dalitz analysis of neutral D mesons decaying to pions, antipions, and neutral pions in CLEO II.V
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-26T22:56:52Z No. of bitstreams: 1 Plager.pdf: 17514166 bytes, checksum: 27b1713aca77a4cc45067c9293b881ef (MD5)
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