Experimental tests of new SO(10) grand unification

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.31.1718· OSTI ID:6054857

Chang, D; Mohapatra, R N; Gipson, J M; Marshak, R E; Parida, M K

A new approach to SO(10) grand unification was recently proposed by three of the authors (D.C., R.N.M., and M.K.P.), where the mass scale M/sub P/ at which the D-parity symmetry present in the SO(10) group breaks was decoupled from the scale M/sub W//sub R/ of the right-handed currents. In contrast with the conventional treatment of the SO(10) model, SU(2)/sub L/ x SU(2)/sub R/ x G (G is SU(4)/sub C/ or SU(3)/sub C/ x U(1)/sub B/-L) can appear as an intermediate symmetry with g/sub L/not =g/sub R/. Calculations in the one-loop approximation lead to a substantially different picture of intermediate mass scales for SO(10)-symmetry breaking than before. In this paper, this analysis is extended to include two-loop contributions which are significant for several symmetry-breaking chains. All possible chains descending to the standard group SU(2)/sub L/ x U(1)/sub Y/ x SU(3)/sub C/ are examined. A unique chain emerges if one imposes a minimality condition (using the lowest-dimensional Higgs multiplet at each symmetry-breaking stage) and the phenomenological requirements of tau/sub p/..-->..e/sup +/..pi../sup 0/> or =2 x 10/sup 32/ yr, sin/sup 2/theta/sub W/(M/sub W/) = 0.22 +- 0.02, and ..cap alpha../sub s/(M/sub W/) = 0.10--0.12.

• Research Organization: Department of Physics, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6054857
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 31:7; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645301 -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGICAL MODELS
CP INVARIANCE
FIELD THEORIES
GRAND UNIFIED THEORY
INVARIANCE PRINCIPLES
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
SO GROUPS
SO-10 GROUPS
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SU-4 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
TESTING
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
UNIVERSE