Charged-fermion masses in SO (10): Analysis with scalars in 10⊕120

Autor(en)

Luis Lavoura, Helmut Kühböck, Walter Grimus

Abstrakt

We consider the scenario in which the mass matrices of the charged fermions in the SO (10) grand unified theory are generated exclusively by renormalizable Yukawa couplings to one 10 ? 120 representation of scalars. We analyze, partly analytically and partly numerically, this scenario in the three-generations case. We demonstrate that it leads to unification of the b and t masses at the GUT scale. Testing this scenario against the mass values at the GUT scale, obtained from the renormalization-group evolution in the minimal SUSY extension of the Standard Model, we find that it is not viable: either the down-quark mass or the top-quark mass must be unrealistically low. If we include the CKM mixing angles in the test, then, in order that the mixing angles are well reproduced, either the top-quark mass or the strange-quark mass together with the down-quark mass must be very low. We conclude that, assuming a SUSY SO (10) scenario, charged-fermion mass generation based exclusively on one 10 ? 120 representation of scalars is in contradiction with experiment.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Universidade Técnica de Lisboa

Journal

Nuclear Physics, Section B

Band

754

Seiten

1-16

Anzahl der Seiten

16

ISSN

0550-3213

DOI

https://doi.org/10.1016/j.nuclphysb.2006.07.024

Publikationsdatum

2006

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik, 103034 Teilchenphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/chargedfermion-masses-in-so-10-analysis-with-scalars-in-10120(a3bd8fa3-7476-437d-8ee1-aa819932dd07).html