Measurement of the Partial Branching Fraction for Inclusive
نویسندگان
چکیده
Charmless semileptonic decays, B → X u ℓ¯ ν, are studied in a sample of 232 million BB decays recorded with the BABAR detector, in events where the decay of the second B meson is fully reconstructed. Inclusive charmless decays are selected in kinematic regions where the dominant background from semileptonic B decays to charm is reduced by requirements on the hadronic mass M X and the momentum transfer q 2. The partial branching fraction for B → X u ℓ¯ ν decays for M X <
منابع مشابه
Inclusive and Exclusive B → S/dγ
In this article, I review the recent results for inclusive and exclusive measurements for b → sγ and b → dγ decays from B factories Belle and Babar. I describe the measurement of branching fraction and direct CP violating asymmetry for inclusive B → Xsγ decay. For results of b→ dγ process, I introduce the measurement of branching fraction of exclusive b → dγ modes, the first measurement for CP ...
متن کاملEuropean Organization for Nuclear Research Measurement of the Inclusive Charmless Semileptonic Branching Fraction of Beauty Hadrons and a Determination of Jv Ub J at Lep
A measurement of the inclusive charmless semileptonic branching fraction of beauty hadrons, b ! X u ``, has been performed using almost two million hadronic Z decays collected by the L3 experiment at LEP, yielding the result:
متن کاملB Decays to D
The e + e − annihilation data recorded with the BABAR detector has been used to study B 0 decays to D (*)+ s and D * − mesons. The production fraction of inclusive D (*)+ s and the corresponding momentum spectra have been determined. Exclusive decays B 0 → D * − D (*)+ s have been identified with a partial reconstruction technique and their branching ratios have been measured. Fully reconstruct...
متن کاملRecent Results from CLEO on B Meson Decays
CLEO has made a number of important new B measurements over the past two years. I report here a new measurement of the inclusive branching fraction B(B ! X``) using lepton tags which has very small model uncertainties and provides the best upper limit yet for the fraction of non-BB decays of the (4S). New values for V cb and B(b ! c ! `) which result from this analysis are also reported. A numb...
متن کاملInclusive radiative B meson decays at Belle
We present the most precise inclusive measurement of the branching fraction and photon energy spectrum of b → sγ radiative decays up to date. The photon energy distribution is measured for E γ > 1.7 GeV. The measurement is performed by the Belle collaboration using 605 fb −1 of data recorded by the Belle detector at the KEKB collider.
متن کامل