Martin Gremm

Order1/mb3corrections toB→Xclν¯decay and their implication for the measurement of Λ¯andλ1

We compute the order 1/m_b^3 nonperturbative contributions to the inclusive differential B\to X_c\ell\bar\nu decay rate. They are parametrized by the expectation values of two local and four nonlocal dimension-six operators. We use our results to estimate part of the theoretical uncertainties in the extraction of matrix elements \bar\Lambda and \lambda_1 from the lepton spectrum in the inclusive semileptonic B decay and find them to be very large. We also compute the 1/m_b^3 corrections to the moments of the hadronic invariant mass spectrum in this decay, and combine them with the extracted values of \bar\Lambda and \lambda_1 to put an upper bound on the branching fraction Br(B\to D^{**}\ell\bar\nu).

Implications of theB→Xℓν¯ℓLepton Spectrum for Heavy Quark Physics

The shape of the lepton spectrum in inclusive semileptonic

Annihilation of S-wave quarkonia and the measurement of αs

B\to X\,\ell\,\bar\nu_\ell

Order α s 2 β 0 correction to the charged lepton spectrum in b → c l ν ¯ l decays

decay is sensitive to matrix elements of the heavy quark effective theory,

A Note on brane boxes at finite string coupling

\bar\Lambda

Exact solutions for some N = 2 supersymmetric SO(N) gauge theories with vectors and spinors

and

Order 1/m_b^3 corrections to B\to X_c\ell\bar\nu decay and their implication for the measurement of \bar\Lambda and \lambda_1

\lambda_1

Coulomb branch ofN=1supersymmetricSU(Nc)×SU(Nc)gauge theories

. From CLEO data we extract

tau polarization in Lambda b-->Xc tau nu -bar and B-->Xc tau nu -bar.

\bar\Lambda=0.39\pm0.11\,

Order alpha_s^2 beta_0 Correction to the Charged Lepton Spectrum in b \to c \ell \bar\nu_\ell decays

GeV and