## Abstract

Rare decays of B mesons, such as B → K∗γ and B → K(∗)ℓ+ℓ− are loop suppressed in the Standard Model and sensitive to new physics. The final state meson in heavy-light decays at large recoil has sizeable momentum in the rest frame of the decaying meson. To reduce the resulting discretization errors we formulate the nonrelativistic heavy quark action in a moving frame. We discuss the perturbative renormalization of the leading order heavy-light operators in the resulting theory which is known as m(oving)NRQCD.

We also present radiative corrections to the NRQCD action computed using automated lattice perturbation theory. By combining this technique with high-beta simulations in the weak coupling regime of the theory higher order loop corrections can be calculated very efficiently.

We also present radiative corrections to the NRQCD action computed using automated lattice perturbation theory. By combining this technique with high-beta simulations in the weak coupling regime of the theory higher order loop corrections can be calculated very efficiently.

Original language | English |
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Title of host publication | The XXVII International Symposium on Lattice Field Theory (LAT2009) |

Subtitle of host publication | Weak Decays and Matrix Elements |

Publisher | Sissa Medialab |

Volume | 91 |

DOIs | |

Publication status | Published - 23 Jun 2010 |