22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Towards a global fit to extract the B -> X_s gamma rate and |Vub|

24 Jul 2010, 10:15
13m
Salle 242A ()

Salle 242A

Parallel Session Talk 06 - CP violation, CKM and Rare Decays 06 - CP violation, CKM and Rare Decays

Speaker

Mr Florian Bernlochner (Humboldt University of Berlin)

Description

The total B -> X_s gamma rate and the CKM-matrix element |Vub| determined from semileptonic B-meson decays play an important role in finding indirect evidence of new physics in the flavor sector of the Standard Model, complementary to the direct searches at LHC and Tevatron. Their determination requires the precise knowledge of the parton distribution function for the b quark in the B-meson (called the shape function). We implement a new model-independent framework for the shape function with reliable theoretical uncertainties based on an expansion in a suitable set of basis functions. This is a significant improvement over using model functions. We present the current status of a global fit to BaBar and Belle data to extract the shape function, the B -> X_s gamma rate and |Vub|.

Primary author

Mr Florian Bernlochner (Humboldt University of Berlin)

Co-authors

Dr Frank Tackmann (Massachusetts Institute of Technology) Prof. Heiko Lacker (Humboldt University of Berlin) Prof. Iain Stewart (Massachusetts Institute of Technology) Dr Kerstin Tackmann (CERN) Dr Zoltan Ligeti (Lawrence Berkeley National Laboratory)

Presentation Materials