Anatomy of b -> c decays

23 Jul 2018, 15:00
Plaza 8

Plaza 8


Debjyoti Bardhan (Ben Gurion University of the Negev)


There have been recent excitement regarding certain B-decays both in the charged and neutral current sectors. In the charged sector, the measurement of $R_D$ and $R_{D^*}$ may point to the existence of Physics Beyond the Standard Model, and is thus worth discussing threadbare. Building on our earlier paper (JHEP 1701 (2017) 125), we carry out a comprehensive analysis of these anomalies in as model-independent a fashion as possible. Specifically, using just the six-dimensional SU(2)xU(1) gauge invariant Standard Model effective theory operators, we explicitly calculate the different tensions and correlations between certain neutral current decays and the $R_{D^{(*)}}$ anomalies. We explore the constraints that these neutral current processes impose on the possible explanations of the observed anomalies.

Additionally, we also consider the viability of the Composite Higgs paradigm (with and without leptoquarks) and partial compositeness as a natural explanation of the anomalies. We also show the various tensions (particularly in the $\Delta F = 2$ processes) without assuming a specific flavour structure in the composite Higgs sector.

Our new analysis (with Dr. D. Ghosh, Dr. A. Azatov, E. Venturini and F. Sgarlata) will be uploaded on arXiv soon.

Parallel Session BSM aspects of Flavour and Neutrino Physics

Primary author

Debjyoti Bardhan (Ben Gurion University of the Negev)


Presentation materials