Radiative corrections to the m(oving)NRQCD action and heavy-light operators

Eike Müller, CTH Davies, Alistair Hart, Georg von Hippel, Ron Horgan, Iain Kendall, Andrew Lee, S Meinel, CJ Monahan, M Wingate

Research output: Chapter in Book/Report/Conference proceedingChapter in a published conference proceeding

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.
Original languageEnglish
Title of host publicationThe XXVII International Symposium on Lattice Field Theory (LAT2009)
Subtitle of host publicationWeak Decays and Matrix Elements
PublisherSissa Medialab
Volume91
DOIs
Publication statusPublished - 23 Jun 2010

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