recent progress in susy guts
DESCRIPTION
Recent Progress in SUSY GUTs. K.S. Babu Oklahoma State University. ICHEP 2010 Palaise des Congres, Paris July 22-28, 2010. Outline. Motivations/Evidences favoring GUTs. Structure of Matter Multiplets. Standard Model. SO(10). Evolution of Gauge Couplings. Standard Model. MSSM. - PowerPoint PPT PresentationTRANSCRIPT
Recent Progress in SUSY GUTsRecent Progress in SUSY GUTs
K.S. BabuK.S. BabuOklahoma State UniversityOklahoma State University
ICHEP 2010ICHEP 2010
Palaise des Congres, ParisPalaise des Congres, Paris
July 22-28, 2010July 22-28, 2010
Outline
Motivations/Evidences favoring GUTs
Standard Model SO(10)
Structure of Matter Multiplets
Standard Model MSSM
Evolution of Gauge Couplings
Gauge coupling evolution in explicit SO(10) model
Very Close to the GUT scale
from atmospheric neutrino oscillation data
Leptogenesis via R decay explains cosmological baryon asymmetry
Neutrino masses and the scale of new physics
Finding order in fermion mass spectrum
Matter multiplets:
Higgs:
Yukawa Couplings
Contain color triplets
Georgi, Glashow (1974)Minimal SU(5) GUT
MSSM Higgs doublets have color triplet partners in GUTsMSSM Higgs doublets have color triplet partners in GUTs
must remain lightmust remain light
must have GUT scale mass to prevent rapid must have GUT scale mass to prevent rapid proton decayproton decay
Doublet-triplet splitting
Even if color triplets have GUT scale Even if color triplets have GUT scale mass, d=5 proton decay is problematicmass, d=5 proton decay is problematic
The GOODThe GOOD
(1)(1) Predicts unification of couplingsPredicts unification of couplings
(2)(2) Uses economic Higgs sectorUses economic Higgs sector
The BADThe BAD
(1)(1) Unnatural fine tuningUnnatural fine tuning
(2)(2) Large proton decay rateLarge proton decay rate
FINE-TUNED TO O(MW)
Doublet-Triplet splitting in SUSY SU(5)
Nucleon decay in SUSY GUTs
Hisano, Murayama, Yanagida (1993)Nath, Perez, Phys. Rept. (2007)
Higgsino Exchange:Higgsino Exchange: Sakai, Yanagida (1982)
Weinberg (1982)
SUSY SO(10) Models
contains contains
Model has only 11 real parameters plus 7 phases
Higgs: Automatic R-parity
SUSY SO(10) Model with 126-plet
Babu, Mohapatra (1993)Bajc, Melfo, Senjanovic, Vissani (2004)Fukuyama, Ilakovac, Kikuchi, Meljanac, Okada (2004)Aulakh et al (2004)
Bertolini, Frigerio, Malinsky (2004)Babu, Macesanu (2005)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
Global fit to fermion masses in minimal SO(10)
Bertolini, Malinsky, Schwetz (2006)
(Dimopoulos-Wilczek mechanism)
SUSY SO(10) with natural doublet-triplet splitting
Dimopoulos, Wilczek (1981)Babu, Barr (1993)Barr, Raby (2000)
Babu, Pati, Tavartkiladze (2010)
Babu, Pati, Tavartkiladze (2010)
Babu, Pati, Wilczek (2000)
Fermion masses and mixings
Postdictions/Predictions
Complete SO(10) Model
Doublet-triplet mass matrix
GUT scale threshold corrections
Correlation between d = 5 and d= 6 proton decay
Proton Lifetime Predictions
Proton lifetime expectations
Summary and Conclusions