Yoav Achiman

Can one phase induce all CP violations including leptogenesis

Abstract In the framework of a SUSY SO ( 10 ) model a phase is generated spontaneously for the B − L breaking VEV. Fitting this phase to the observed CP-violating K, B decays all other CP breaking effects are uniquely predicted. In particular, the amount of leptogenesis can be explicitly calculated and found to be in the right range and sign for the BAU.

Gauge mediated proton decay in a renormalizable SUSY SO(10) with realistic mass matrices

Abstract Proton decay via d =5 operators is excluded by now not only in the framework of SUSY SU (5) but also its extensions like SUSY SO (10) are on the verge of being inconsistent with d =5 decays. It is reasonable therefore to suppress, e.g., by a symmetry, the d =5 operators and to consider gauge boson induced d =6 decays. This is suggested in several recent papers in the framework of models with a lighter M X . We discuss here explicity the fermionic sector of such a renormalized SUSY SO (10) with realistic mass matrices. We find that the recently “observed” large leptonic mixing leads to an enhancement of the nucleon decay channels involving μ s and, in particular, the μ + π 0 , μ + π − modes.

Large quark rotations, neutrino mixing and proton decay

Right-handed (RH) rotations do not play a role in the Standard Model, and only the differences of the LH mixing angles are involved in VCKM. This leads to the huge freedom in the fermionic mass matrices. However, that is no more true in extensions of the Standard Model. For example in GUTs large RH rotations of the quarks can be related to the observed large neutrino mixing or in particular, all mixing angles are relevant for the proton decay. We present a simple realistic non-SUSY SO(10) GUT with large RH and LH mixing and study the corresponding nucleon decay rates.

Nonlocal superpositions of K0,\(\bar K^0 \) andCP violationandCP violation

SummaryWe assume that KS, KL arenonlocal superpositions of K0 and

LARGE QUARK ROTATIONS NEUTRINO OSCILLATIONS AND PROTON DECAY

\bar K^0

A Scenario for Spontaneous CP Violation in SUSY SO(10)

, and briefly discuss a possible interpretation of this assumption. It is found that the form of such a nonlocality is unique, in the first order of its space-time expansion, up to a parameter. Using this form, we find expressions for the measurable quantities in the KS, KL decays. In the simplest nontrivial case, we find

??????????? ???????????? K0,

\eta _{00} \approx - 2\eta _{ + - }