July 29, 2019 to August 2, 2019
Northeastern University
US/Eastern timezone

A U(1)_X extension to the MSSM with three families

Not scheduled
Shillman 335 (Northeastern University)

Shillman 335

Northeastern University

Poster Beyond Standard Model Physics Beyond Standard Model


Dr Roberto Martinez (Universidad Nacional de Colombia)


We propose a supersymmetric extension of the anomaly-free and three families
nonuniversal U(1) model, with the inclusion of four Higgs doublets and four Higgs
singlets. The quark sector is extended by adding three exotic quark singlets, while the
lepton sector includes two exotic charged lepton singlets, three right-handed neutrinos
and three sterile Majorana neutrinos to obtain the fermionic mass spectrum. By
implementing an additional Z2 symmetry, the Yukawa coupling terms are suited in
such a way that the fermion mass hierarchy is obtained without fine-tuning. The
effective mass matrix for SM neutrinos is fitted to current neutrino oscillation data
to check the consistency of the model with experimental evidence, obtaining that
the normal-ordering scheme is preferred over the inverse ones. The electron and up,
down and strange quarks are massless at tree level, but they get masses through
radiative correction at one loop level coming from the squark and gluino or squark
and Higgsinos contributions. We show that the model predicts a like-Higgs SM mass
at electroweak scale by using the VEV according to the symmetry breaking and
fermion masses.

Primary authors

Dr Roberto Martinez (Universidad Nacional de Colombia) Mr Sebastian Alvarado (Universidad Nacional de Colombia) Mr Carlos Diaz (Universidad Nacional de Colombia)

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