Limits on the strength of a left-right-symmetric electroweak interaction

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.29.127· OSTI ID:5170768

Hwang, M; Oakes, R J

We have investigated the constraints imposed on left-right-symmetric theories of weak and electromagnetic interactions by the K/sub L/-K/sub S/ mass difference, including the additional restrictions on the top-quark mass and mixing angles coming from the K/sub L/..--> mu../sup +/..mu../sup -/ decay rate, and emphasizing the sensitivity of the results to various model-dependent assumptions. In the manifestly left-right-symmetric electroweak theory it was found that values for m/sub R/, the mass of the charged right-handed boson W/sub R/, as low as 220 GeV/c/sup 2/ (the original estimate of Beg, Budny, Mohapatra, and Sirlin) cannot be ruled out. However, for a large class of plausible models the lower bound on the mass of W/sub R/ was found to be considerably higher, but still within the range that experiments now in progress will be able to explore. The lower bound on m/sub R/ was also found to be quite sensitive to the value assumed for the top-quark mass and to the model-dependent values of the hadronic matrix elements of the quark operators, as well as to certain model-dependent assumptions regarding the dispersive part of the K/sub L/..--> mu../sup +/..mu../sup -/ amplitude. We present the lower bound on m/sub R/ for a wide range of the relevant parameters, which includes two specific models: the MIT bag model and the vacuum-insertion approximation.

• Research Organization: Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60201
• OSTI ID: 5170768
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 29:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
COMPOSITE MODELS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
HADRONS
INTERACTIONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
KAONS NEUTRAL SHORT-LIVED
LEPTONS
LIE GROUPS
MASS DIFFERENCE
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESONS
MUONS
PAIR PRODUCTION
PARTICLE MODELS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUARK MODEL
STRANGE PARTICLES
SU GROUPS
SU-2 GROUPS
SYMMETRY GROUPS
WEAK INTERACTIONS