B-L Violating Nucleon Decay and GUT B-L Violating Nucleon Decay and GUT Scale Baryogenesis in SO(10)Scale Baryogenesis in SO(10)

K.S. BabuK.S. BabuOklahoma State UniversityOklahoma State University

International Workshop on Grand Unified TheoriesInternational Workshop on Grand Unified Theories

Yukawa Institute of Theoretical Physics, Kyoto, JapanYukawa Institute of Theoretical Physics, Kyoto, Japan

March 15-17, 2012March 15-17, 2012

Outline

Standard Model

SO(10)

Structure of Matter Multiplets

Grand Unification based on SO(10)

KB, Gogoladze, Nath, Syed

Model has only 11 real parameters plus 7 phases

Minimal SO(10) Models with 126-plet

Babu, Mohapatra (1993)Fukuyama, Okada (2002)Bajc, Melfo, Senjanovic, Vissani (2004)Fukuyama, Ilakovac, Kikuchi, Meljanac, Okada (2004)Aulakh et al (2004)

Bertolini, Frigerio, Malinsky (2004)Babu, Macesanu (2005)Bertolini, Malinsky, Schwetz (2006)Dutta, Mimura, Mohapatra (2007)Bajc, Dorsner, Nemevsek (2009)

Fit Input at GUT scale

Output: Type II Seesaw

Babu, Macesanu (2005)

Specific Example for Quark & Lepton masses

Non-SUSY SO(10) fit

Joshipura, Patel (2011)

Nucleon decay in GUTs

Hisano, Murayama, Yanagida (1993)Nath, Perez, Phys. Rept. (2007)

Higgsino Exchange:Higgsino Exchange: Sakai, Yanagida (1982)

Weinberg (1982)

Baryon number violating effective operators

Weinberg (1979)Wilczek, Zee (1979)

B violation beyond the leading order

Origin of d = 7 operators in SO(10)

Aulkh, Girdhar (2004)Fukuyama et. al (2004)Nath, Syed (2001)

Yukawa coupling in SO(10) (cont.)

Scalar exchange for d = 7 operators

d = 7 operators from 120 exchange

d = 7 operators from gauge boson exchange

B-L violating nucleon decay rates

Intermediate scale in non-SUSY SO(10)

Mohapatra, Parida (1992)Pal, Keith, Deshpande (1992)

Revival of GUT scale Baryogenesis

B-L asymmetry in scalar decays

B-L asymmetry in scalar decays (cont.)

B-L asymmetry from gauge boson decays

B-L asymmetry in SUSY models

Summary and Conclusions