Bounds on the mass of W sub R and the W sub L - W sub R mixing angle. zeta. in general SU(2) sub L times SU(2) sub R times U(1) models
- Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (US)
We consider the phenomenological constraints on the mass {ital M}{sub {ital R}} and the {ital W}{sub {ital L}}-{ital W}{sub {ital R}} mixing angle {zeta} in a very general class of SU(2){sub {ital L}}{times}SU(2){sub {ital R}}{times}U(1) models. In particular, almost no model-dependent assumptions are made concerning left-right symmetry or the Higgs structure of the theory, which means that {ital U}{sup {ital R}}, the mixing matrix for right-handed quarks, is unrelated to the left-handed Cabibbo-Kobayashi-Maskawa matrix {ital U}{sup {ital L}}. We consider a number of possibilities for the neutrinos occurring in right-handed currents, including (a) heavy Majorana neutrinos, (b) heavy Dirac neutrinos, (c) intermediate-mass (10--100 MeV) neutrinos, and (d) light neutrinos (e.g., the Dirac partners of the ordinary left-handed neutrinos). For each case we utilize relevant constraints from the {ital K}{sub {ital L}}-{ital K}{sub {ital S}} mass difference, {ital B}{sub {ital d}}{bar B}{sub d} oscillations, the {ital b} semileptonic branching ratio and decay rate, neutrinoless double-beta decay, theoretical relations between mass and mixing, universality, nonleptonic kaon decays, muon decay, and astrophysical constraints from nucleosynthesis and SN 1987A. As is to be expected the limits on {ital M}{sub {ital R}} are considerably weaker than for the special case of manifest or pseudomanifest left-right symmetry ({ital M}{sub {ital R}}{gt}1.4 TeV). In fact, if extreme fine-tuning is allowed the {ital W}{sub {ital R}} could be as light as the ordinary {ital W}{sub {ital L}}. However, with reasonable restrictions on fine-tuning one obtains {ital M}{sub {ital R}}{gt}300 GeV for {ital g}{sub {ital R}}=g{sub L}, with more stringent limits holding for most of parameter space.
- OSTI ID:
- 5554335
- Journal Information:
- Physical Review (Section) D: Particles and Fields; (USA), Vol. 40:5; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FERMIONS
CHARGED-CURRENT INTERACTIONS
BETA DECAY
BRANCHING RATIO
CABIBBO ANGLE
CP INVARIANCE
DIRAC EQUATION
EIGENSTATES
HIGGS MODEL
KOBAYASHI-MASKAWA MATRIX
MASS DIFFERENCE
MUONS
NEUTRINOS
NUCLEOSYNTHESIS
QUARKS
SU-2 GROUPS
SUPERNOVAE
SYMMETRY BREAKING
U-1 GROUPS
DECAY
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
ERUPTIVE VARIABLE STARS
FIELD THEORIES
INTERACTIONS
INVARIANCE PRINCIPLES
LEPTONS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRICES
NUCLEAR DECAY
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
STARS
SU GROUPS
SYMMETRY GROUPS
SYNTHESIS
U GROUPS
UNIFIED-FIELD THEORIES
VARIABLE STARS
WAVE EQUATIONS
645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties
645204 - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties
645300 - High Energy Physics- Particle Invariance Principles & Symmetries