Absolute branching fraction measurements of exclusive D+ semileptonic decays.
نویسندگان
چکیده
Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present improved measurements of the absolute branching fractions of D+decays to K0e+ve, pi0e+ve, K*0e+ve, and p0e+ve, and the first observation and absolute branching fraction measurement of D+ --> omega e+ve. We also report the most precise tests to date of isospin invariance in semileptonic D0 and D+ decays.
منابع مشابه
Semileptonic 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 کاملSemileptonic Decays of B Mesons
In this section, 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 arise in ex...
متن کاملAbsolute branching fraction measurements of exclusive D0 semileptonic decays.
With the first data sample collected by the CLEO-c detector at the psi(3770) resonance we have studied four exclusive semileptonic decays of the D0 meson. Our results include the first observation and absolute branching fraction measurement for D0 --> p-e+ve and improved measurements of the absolute branching fractions for D0 decays to K-e+ve, pi-e+ve, and K*-e+ve.
متن کاملNew Results on Charmed
In this paper we describe new measurements of Do and D+ hadronic and semileptonic decays made with the MARK III detector at SPEAR. In the hadronic decays of the Do and D+ , a high statistics determination of absolute D meson branching ratios is presented from fully reconstructed Db events. The same technique provides preliminary results of a search for Dono mixing. Using the charm cross section...
متن کاملBeauty Semileptonic Branching Ratios
Recent measurements of inclusive and exclusive semileptonic b branching ratios are reviewed. Model-independent analyses from ARGUS and CLEO connrm the value B(b ! ``X) = 10:4%, while new analyses from ALEPH obtain higher values above 11%. The diierence is not consistent with measured values of b hadron lifetime. New measurements of B(B ! D ? ``) from CLEO and ALEPH are in good agreement. First ...
متن کاملdΓ/dq Spectra and Branching Fractions of Exclusive Semileptonic D Meson Decays
We study the exclusive semileptonic decays of D meson with the lepton mass effects into consideration, and obtain the dΓ/dq spectra and the branching fractions. We find that for the decay to a vector meson and a muon lepton pair (D → Kμν and D → ρμν) the dΓ/dq spectrum has a sharp peak at q = 0.022 GeV, and the branching fraction of the muon mode is substantially larger than that of the electro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 95 18 شماره
صفحات -
تاریخ انتشار 2005