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Heidelberg 2007 – scientific programme

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T: Fachverband Teilchenphysik

T 406: Flavour Theorie I

T 406.4: Talk

Thursday, March 8, 2007, 17:30–17:45, KIP SR 2.401

Electromagnetic Corrections to the Inclusive Rare Decay BXs+ — •Tobias Huber1,2, Tobias Hurth3,4, Enrico Lunghi2,5, Mikolaj Misiak2,6, and Daniel Wyler21Institut f. Theoretische Physik E, RWTH Aachen, D - 52056 Aachen — 2Institut f. Theoretische Physik, Universitaet Zuerich, CH - 8057 Zuerich — 3CERN Theory Division, CH - 1211 Genf — 4SLAC, Stanford University, Stanford, CA 94309, USA — 5Fermi National Accelerator Laboratory, Batavia, IL 60510, USA — 6Institute for Theoretical Physics, Warsaw University, PL-00-681 Warsaw, Poland

The inclusive rare decay BXs+ is a FCNC process and therefore a sensitive probe for physics beyond the Standard Model.

We report on a recent calculation [1,2] of logarithmically enhanced electromagnetic corrections to the decay rate and forward backward asymmetry. We also present the results of a detailed phenomenological analysis, including for instance the branching ratio integrated over the low dilepton invariant mass region 1 GeV2 < mℓℓ2 < 6 GeV2, and the position of the zero of the forward backward asymmetry.

Possible New Physics implications will be briefly discussed as well.

[1] T. Huber, E. Lunghi, M. Misiak, D. Wyler, Nucl. Phys. B740 (2006) 105. E-Print Archive: hep-ph/0512066

[2] T. Huber, T. Hurth, E. Lunghi, work in progress

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