Addressing the LHCb anomalies with a non-universal Z'

Addressing the LHCb anomalies with a non-universal Z'
Javier Fuentes Martin, IFIC, Valencia
Date and time: Tue, Nov 24, 2015 - 2:30pm
Location: LGRT 419B
Category: ACFI Seminar
Abstract:
The LHCb collaboration recently reported several anomalies in B meson decays which, taken at face value, imply a large deviation of lepton-flavor universality. After a brief discussion on the anomalies, I will present a possible solution based on a non-universal U(1)' extension of the Standard Model (SM) gauge symmetry. This model is characterized by the presence of flavor violating Z' couplings in the down-quark sector controlled by off-diagonal CKM matrix elements. Anomaly cancellation conditions fix the extension of the symmetry to the lepton sector in a precise way, introducing flavor-conserving non-universal interactions. The new gauge sector is very predictive and presents an interesting phenomenology, with several smoking-gun signatures that will be tested in the near future.