نتایج جستجو برای: b meson

تعداد نتایج: 908529  

Journal: :Nuclear Physics B - Proceedings Supplements 1998

Journal: :The European Physical Journal C 2017

Journal: :International Journal of Modern Physics A 2016

2008
S. Behari

Using data samples in excess of 1 fb collected by the CDF II detector we present several world’s best measurements of B hadron lifetimes. They include Bs meson lifetime in a flavor-specific decay mode, combining fully and partially reconstructed hadronic decays, B c meson lifetimes in semileptonic B + c → J/ψl X, l = μ, e decays and Λb baryon lifetime in Λ+c π − fully-reconstructed decays. In a...

2009
M. Nakao

After the establishment of the Kobayashi-Maskawa mechanism of CP violation at the two B factories, possibilities to increase the integrated luminosity by two orders of magnitude have been investigated, since it seems to be the amount needed to find physics beyond the Standard Model through CP violating and other observables in rare B meson decays, D meson decays and τ lepton decays. This report...

2008
Norikazu Yamada

We extend our previous studies to calculate the B meson B parameters BB and BS on the lattice, and present an update of the results for the Bs meson width difference. We perform an extensive study of systematic errors in the quenched calculation of the B-parameters, and find that the systematic errors are in good control using the NRQCD action for heavy quark. We also report our preliminary res...

2002
Martin Beneke Matthias Neubert

Exclusive hadronic B-meson decays into two-body final states consisting of a light pseudoscalar or vector meson along with an η or η meson are of great phenomenological interest. Their theoretical analysis involves decay mechanisms that are unique to flavor-singlet states, such as their coupling to gluons or their “intrinsic charm” content. These issues are studied systematically in the context...

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