CP violation in a minimal renormalizable supersymmetric SO(10) model and beyond

Journal Article · Thu Sep 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.055021· OSTI ID:20711491

Bertolini, Stefano; Malinsky, Michal ^[1]

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1. Scuola Internazionale Superiore di Studi Avanzati, via Beirut 4, I-34014 Trieste and INFN, Sezione di Trieste (Italy)

We investigate the role of CP phases within the renormalizable SUSY SO(10) GUT with one 10{sub H}, one 126{sub H} one 126{sub H} and one 210{sub H} Higgs representations and type II seesaw dominating the neutrino mass matrix. This framework is non trivially predictive in the fermionic sector and connects in a natural way the GUT unification of b and {tau} Yukawa couplings with the bi-large mixing scenario for neutrinos. On the other hand, existing numerical analysis claim that consistency with quark and charged lepton data prevents the minimal setup from reproducing the observed CP violation via the Cabibbo-Kobayashi-Maskawa (CKM) matrix. We re-examine the issue and find by inspection of the fermion mass sum rules and a detailed numerical scan that, even though the CKM phase preferentially takes values in the second quadrant, the agreement of the minimal model with the data is actually obtained in a non negligible fraction of the parameter space. We then consider a recently proposed renormalizable extension of the minimal model, obtained by adding one chiral 120-dimensional Higgs supermultiplet. We show that within such a setup the CKM phase falls naturally in the observed range. We emphasize the robust predictivity of both models here considered for neutrino parameters that are in the reach of ongoing and future experiments.

• OSTI ID: 20711491
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
COUPLINGS
CP INVARIANCE
HIGGS BOSONS
HIGGS MODEL
KOBAYASHI-MASKAWA MATRIX
NEUTRINOS
NUMERICAL ANALYSIS
QUARKS
RENORMALIZATION
REST MASS
SO-10 GROUPS
SUM RULES
SUPERSYMMETRY