Combined analysis of semileptonic B decays to D and D* : R(D(*)) , |Vcb| , and new physics
نویسندگان
چکیده
منابع مشابه
Inclusive semileptonic B decays: |Vcb | and |Vub|
With the discovery of CP violation in the B mesons, and the precise measurement of the angle β [1] of the Unitarity Triangle (UT), the experimental effort focus on the measurements of other parameters to over-constraint the Cabibbo-KobayashiMaskawa (CKM) matrix [2]. In particular the information on the side Rb opposite to the angle β is crucial to test the standard model prediction for CP viola...
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We determine |Vcb| from inclusive semileptonic B decays including resummation of supposedly large perturbative corrections, which originate from the running of the strong coupling. We argue that the low value of the BLM scale found previously for inclusive decays is a manifestation of the renormalon divergence of the perturbative series starting already in third order. A reliable determination ...
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We present an update of our calculation of the form factors and partial widths of semileptonic heavy-to-light meson decays, in the quenched approximation. Our complete data set has now been analysed and our results include chiral extrapolations and a study of the lattice spacing dependence.
متن کاملSemileptonic Decays of D and B Mesons, Part Ii Iv. B-meson Semileptonic Decays the Inclusive Semileptonic Branching Fraction
In the following sections, we discuss some of the key questions related to semileptonic decays of B mesons: the inclusive semileptonic branching fraction, the determination of jV cb j and jV ub j from inclusive and exclusive measurements, recent progress in exclusive semileptonic decays, and form factor measurements and tests of heavy-quark eeective theory. We emphasize the uncertainties that a...
متن کاملIsotopic splittings and OPE in B → D semileptonic decays
It is shown that the kinematical difference in the decays B − → D 0 ℓ ˜ ν and B 0 → D + ℓ ˜ ν due to the isotopic mass splittings of the B and D mesons is compensated in the total decay rate by an appropriate difference in the lepton spectra. Thus there is no effect on the total decay rates in the linear order in the isotopic mass splittings, as required by the general consideration based on th...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2017
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.95.115008