منابع مشابه
B mesons ∗
B̄ → Dπ, D∗π, J/ψK̄ and J/ψπ decays are studied. Their amplitude is given by a sum of factorized and non-factorizable ones. The latter which is estimated by using a hard pion approximation is rather small in color favored B̄ → Dπ and D∗π decays but still can efficiently interfere with the main amplitude given by the factorization. In the color suppressed B̄ → J/ψK̄ and J/ψπ decays, the non-factoriza...
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The MILC collaboration computation of heavy-light decay constants is described. Results for f B , f Bs , f D , f Ds and their ratios are presented. These results are still preliminary, but the analysis is close to being completed. Sources of systematic error, both within the quenched approximation and from quenching itself, are estimated, although the latter estimate is rather crude. ?0:01 , wh...
متن کاملExcited B mesons from the lattice
We determine the energies of the excited states of a heavy-light meson Q¯ q, with a static heavy quark and light quark with mass approximately that of the strange quark from both quenched lattices and with dynamical fermions. We are able to explore the energies of orbital excitations up to L=3, the spin-orbit splitting up to L=2 and the first radial excitation. These b¯ s mesons will be very na...
متن کاملMoving rho-mesons at finite temperature
An exciting aspect of hadron physics is the question how a hadron changes its properties once it is put in a strongly interacting environment. Here, the vector mesons deserve special attention as they couple directly to (virtual) photons. The latter can decay into dileptons which leave the strongly interacting system untouched. Via that process information about possible in-medium modifications...
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...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2002
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(01)01729-7