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Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 15: CP-Verletzung und Mischung

T 15.8: Talk

Monday, March 25, 2019, 17:50–18:05, S15

Measurement of the decay-time-dependent CP asymmetry in B0D*+D with the LHCb experiment — •Philipp Ibis, Antje Mödden, and Margarete Schellenberg — Experimentelle Physik 5, TU Dortmund

The LHCb experiment searches for physics beyond the Standard Model by performing precision measurements. Among these are decay-time-dependent measurements of CP violation in decays of neutral B mesons.

In B0D*+D decays, CP is violated in the interference of direct decays and decays after mixing of the B0 mesons. Time-dependent measurements of decays of initial B0 and B0 mesons allow the determinaion of the CP asymmetry and give access to the CKM angle β. As this decay entails a Cabibbo-suppressed bcc d transition, loop-level Feynman graphs are not additionally suppressed compared to tree-level transitions. Thus, a measurement of CP violation in this channel complements measurements in B0JKS0 decays, which involve non-suppressed bcc s transitions.

The current status of the analysis is presented using the full LHCb dataset corresponding to an integrated luminosity of 9 fb−1.

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