Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

A global fit to extract the B->Xs gamma decay rate

Jul 6, 2012, 2:15 PM
Room 217 (Melbourne Convention and Exhibition Centre)

Room 217

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy Room 217 - Heavy Ion Collisions / B-Physics / CP Violation - TR5/7/9


Mr Florian Bernlochner (University of Victoria (CA))


The measurements of the total B->Xs gamma decay rate and the determination of the CKM matrix element |Vub| play important roles in looking for new physics in the flavor sector of the Standard Model, complementary to the ongoing direct searches at the LHC. Their measurements from present and future B-factory data require the precise knowledge of the nonperturbative parts of the parton distribution function for the b quark in the B-meson (called the shape function). We present the state of the art theory and a global fit to BaBar and Belle data to extract the shape function and the B->Xs gamma decay rate using a model-independent framework with reliable theoretical uncertainties for the shape function, based on an expansion in a set of basis functions.

Primary authors

Mr Florian Bernlochner (University of Victoria (CA)) Frank Tackmann (D) Prof. Heiko Markus Lacker (Humboldt-Universitaet zu Berlin (DE)) Iain Stewart (MIT) Kerstin Tackmann (Deutsches Elektronen-Synchrotron) Zoltan Ligeti (Lawrence Berkeley National Lab. (US))

Presentation materials