22-29 July 2015
Europe/Vienna timezone

A class of Z' models with non-universal couplings and protected flavor-changing interactions

Jul 23, 2015, 10:00 AM


talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries


Javier Fuentes-Martin (IFIC, Universitat de València-CSIC)


Motivated by the $b\to s\ell^+\ell^-$ anomalies recently reported by the LHCb collaboration, I will present a class of flavored $\mathrm{U(1)}^\prime$ gauge extensions of the Standard Model that naturally accommodate them and present a rich phenomenology. This class of models is characterized by the presence of tree-level flavor-changing $Z'$ couplings in the down-quark sector, protected by the off-diagonal quark-mixing matrix elements. Anomaly cancellation fixes the extension of the symmetry to the lepton sector in a very specific way, giving rise to flavor-conserving family-non-universal Z' couplings. The fermion sector of these models is the same as in the Standard Model while the scalar sector is extended with an extra Higgs doublet and a scalar singlet. These models will be tested in the next run of LHC and present specific correlations in certain flavor observables that allow to clearly discriminate among them and with other new physics signals.

Primary authors

Alejandro Celis (Ludwig-Maximilians-Universität München) Hugo Serodio (Korea Advanced Institute of Science and Technology) Javier Fuentes-Martin (IFIC, Universitat de València-CSIC) Martin Jung (TUM Institute for Advanced Study)

Presentation materials