Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 58: Suche nach neuer Physik 4
T 58.8: Vortrag
Mittwoch, 6. März 2013, 18:35–18:50, WIL-C133
Analysis of the rare decay B → K*e+e− at LHCb — •Claire Prouve and Marie-Helene Schune — Laboratoire de l’Accélérateur Linéaire, Paris, France
The b → sγ transition proceeds through flavour changing neutral currents, and thus is particularly sensitive to the effects of new physics. While the branching ratio of the b → sγ has been measured to be consistent with Standard Model predictions, physics beyond the Standard Model could still be present in details of the decay process such as the photon polarisation.
Information about the photon polarisation can be obtained by performing an angular anlysis of b → s l+ l− decays, such as the B → K*e+ e− decay. Although this decay has been observed by BaBar and Belle the statistics were not sufficient to measure the photon polarisation.
An overview of the method to measure the photon polarisation at the LHCb experiment via an angular analysis of B → K*e+e− at low q2 is presented. The status of the B → K*e+e− analysis with 1fb−1 of pp collisions at √s=7 TeV at LHCb is given.