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PURPOSE To evaluate the performance of the Nidek MK-2000 microkeratome. METHODS The Nidek MK-2000 microkeratome was used in 1,220 cases of LASIK with the Nidek EC-5000 excimer laser. Patients had a wide range of myopia (-0.75 to -25.00 D), hyperopia (+0.75 to +9.00 D) and/or astigmatism (-7.00 to +6.50 D). The flap was created with the 130-microm(More)
PURPOSE To evaluate postoperative spherical aberration reduction and increase of visual acuity with new Flex Scan and custom ablation software. METHODS We created a new customized low spherical aberration ablation profile for myopic patients (true spherical ablation). This aspheric algorithm increases ablation in the midperiphery and periphery to reduce(More)
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.
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)
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)
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 the first general analysis of New Physics contributions to the D0-D[over ](0) lifetime difference (equivalently DeltaGamma(D)). We argue that New Physics (NP) contributions to |DeltaC|=1 processes can dominate the lifetime difference in the flavor SU(3) limit. We provide several specific examples of models that produce sizable effects in(More)
Citation Adams, T. et al. "Renaissance of the ~1 TeV fixed-target program. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Abstract This document describes the physics potential of a new fixed-target program based on a ∼1 TeV proton source. Two proton sources are potentially available in(More)