27th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY2019)

Gauged Lepton Number and Implications for Collider Physics

22 May 2019, 17:20

20m

Aransas (Omni Hotel)

Oral Neutrinos: Models, Phenomenology, Experiments Neutrinos: Models, Phenomenology, Experiments

Speaker

Prof. We-Fu Chang (National Tsing Hua University)

Description

Lepton number has a deep connection with the neutrino mass generation. A new minimal anomaly-free gauged $U(1)_l$ lepton-number model, with four exotic chiral leptons, is studied. Motivated by phenomenology, we discuss a simplified case which has the universal Yukawa couplings. It agrees with all the experimental constraints and predicts $m_e, m_\mu \ll m_\tau$, and the latter is of the electroweak scale. Due to the interference between the SM and $U(1)_l$ gauge interactions, this model robustly predicts that $e,\mu,\tau$ have distinctive forward-backward asymmetries at the $e^+e^-$ colliders. It can be searched for at the $e^+e^-$ machine with $\sim$ TeV center-of-mass energy and an integrated luminosity $\sim ab^{-1}$.

Presentation materials

SUSY2019_WFChang_gauged_L.pdf