Junpei Harada

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We investigate the Symanzik improvement of the Wilson quark action on anisotropic lattices. Taking first a general action with nearest-neighbor and clover interactions, we study the mass dependence of the ratio of the hopping parameters, the clover coefficients, and an improvement coefficient for heavy-light vector and axial vector currents. We show how(More)
40Hz event related potential, or 40Hz-ERP, described by Galambos in 1981 has been considered as the useful potential in predicting hearing threshold across the audiometric frequencies. Although 40Hz-ERP was reported by Galambos as the summation of middle latency responses (MLR), its origin has not been clarified. Moreover reports of the clinical use of(More)
We apply heavy-quark effective theory to separate longand short-distance effects of heavy quarks in lattice gauge theory. In this approach, the inverse heavy-quark mass and the lattice spacing are treated as short distances, and their effects are lumped into short-distance coefficients. We show how to use this formalism to match lattice gauge theory to(More)
We apply heavy-quark effective theory (HQET) to separate longand shortdistance effects of heavy quarks in lattice gauge theory. In this paper we focus on flavor-changing currents that mediate transitions from one heavy flavor to another. We stress differences in the formalism for heavy-light currents, which are discussed in a companion paper, showing how(More)
We study assignments of the hypercharge and baryon minus lepton number for particles in the E6 grand unification model. It is shown that there are three assignments of hypercharge and three assignments of baryon minus lepton number which are consistent with the Standard Model. Their explicit expressions and detailed properties are given. In particular, we(More)
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