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

Constraining CP violation in neutral meson mixing with theory input

Jul 7, 2012, 5:45 PM
Room 220 (Melbourne Convention and Exhibition Centre)

Room 220

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy Room 220 Lattice QCD / B-Physics / CP Violation, etc -TR5&7&10


Dr Sascha Turczyk (Lawrence Berkeley National Laboratory (US))


There has been a lot of recent interest in experimental hints of CP violation in B_{d,s}^0 mixing. The D0 measurement of the semileptonic CP asymmetry would - with higher significance - be a clear signal of beyond the standard model physics. In this talk I present a relation [arXiv:1203.3545] for the mixing parameters, which allows clearer interpretation of the data in models in which new physics enters in M_{12} and/or \Gamma_{12}. This result implies that the central value of the D0 measurement in B_{d,s}^0 decay is not only in conflict with the standard model, but in a stronger tension with data on \Delta\Gamma_s than previously appreciated. After I derive the relation between the theoretical prediction of |\Gamma_{12}| and the measurements of \Delta M, \Delta \Gamma and A_{\rm SL}, I will explain how this result can help to better constrain \Delta\Gamma or A_{SL}, whichever is less precisely measured.

Financial Support Justification for Early-Stage Researchers

Due to the large travel, accommodation, and registration costs, I would like to ask for financial help.

Primary author

Dr Sascha Turczyk (Lawrence Berkeley National Laboratory (US))


Marat Freytsis (Lawrence Berkeley National Laboratory) Zoltan Ligeti (Lawrence Berkeley National Laboratory)

Presentation materials