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We review recent developments in charm physics, focusing on the physics of charmed mesons. We discuss charm spectroscopy, decay constants, as well as searches for new physics with charmed mesons. We discuss D 0 − D 0 mixing and CP-violation in charm decays. We also present the modified Nelson plot of charm mixing predictions.
Conceptual design studies are underway for muon colliders and other high-current muon storage rings that have the potential to become the first true " neutrino factories ". Muon decays in long straight sections of the storage rings would produce precisely characterized beams of electron and muon type neutrinos of unprecedented intensity. This article(More)
We present a calculation of subleading 1/m b corrections to spectator effects in the ratios of beauty hadron lifetimes in heavy-quark expansion. We find that these effects are sizable and should be taken into account in systematic analyses of heavy hadron lifetimes. In particular, the inclusion of 1/m b corrections brings into agreement the theoretical(More)
Standard model factorization can account for the large rate for B ± → η ′ K ±. The large rate for B → η ′ X s is more problematic and requires a " cocktail " solution. Individual contributions from factorization, b → η ′ sg, and " intrinsic charm " fall significantly short of the observed rate. In contrast, the observed η ′ yields are easily explained in(More)
The motivation most often cited in searches for D 0 − D 0 mixing and CP-violation in charm system lies with the possibility of observing a signal from New Physics which dominates that from the Standard Model. We review recent theoretical predictions and experimental constraints on D 0 −D 0 mixing parameters, concentrating on possible effects of New Physics.
The motivation most often cited in searches for D 0 − D 0 mixing and CP-violation in charm system lies with the possibility of observing a signal from new physics which dominates that from the Standard Model. We review recent theoretical predictions and experimental constraints on D 0 − D 0 mixing parameters. We also discuss the current status of searches(More)
We review current status of theoretical predictions of lifetimes of heavy hadrons in heavy-quark expansion. We present a calculation of subleading 1/m b corrections to spectator effects in the ratios of beauty hadron lifetimes. We find that these effects are sizable and should be taken into account in systematic analyses of heavy hadron lifetimes. In(More)
We present exact results, at next-to-leading order in renormalization-group improved perturbation theory, for the Wilson coefficients appearing at order 1/m Q in the heavy-quark expansion of heavy–light current operators. To this end, we complete the calculation of the corresponding two-loop anomalous dimension matrix. Our results are important for(More)