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Title: Left--right symmetric gauge theories of weak and electromagnetic interactions

Abstract

We review the recent progress in spontaneously broken left-right symmetric gauge theories of weak and electromagnetic interactions. Recently gauge theories based on the group SU(2)/Sub L/ x SU(2)/sub R/ x U(1) have been proposed as serious candidates for a unified description of the weak and electromagnetic interactions. Such theories have a number of attractive features which are not shared by the standard SU(2) x U(1) theories. Parity violation as well as CP-violation are spontaneous in origin and, therefore, theories are parity conserving before spontaneous breakdown of the symmetry and also afterwards at asymptotic energies. The asymmetry in low energy charged current weak interaction, i.e., predominance of left-handed charged current interactions over the right-handed ones, is a consequence of the symmetry breaking thus leading to a conceptually different picture of weak interaction at low energies. Another appealing feature of these theories is the beauty and richness of the structure of weak neutral current interactions. One can have a parity conserving structure of the neutral currents (one neutral boson (Z/sub V/) has pure vector and the other (Z/sub A/) pure axial vector coupling to quarks and leptons) which is natural in the technical sense of the word. Models of this type providemore » the most elegant explanation of the failure to find parity violation in atoms at the level predicted on the basis of the Weinberg-Salam model. In spite of manifestly parity conserving neutral current interactions, ..nu../sub ..mu../N and anti ..nu../sub ..mu../N (also ..nu../sub ..mu../e and anti ..nu../sub ..mu../e) neutral current cross-sections have to be unequal in these theories because of the definite parity and charge conjugation of the Z-bosons.« less

Authors:
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (USA)
OSTI Identifier:
6728240
Report Number(s):
BNL-24129; CONF-780453-1
TRN: 78-015914
DOE Contract Number:  
EY-76-C-02-0016
Resource Type:
Conference
Resource Relation:
Conference: Neutrinos, West Lafayette, IN, USA, 28 Apr 1978
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; UNIFIED GAUGE MODELS; REVIEWS; ELECTROMAGNETIC INTERACTIONS; GAUGE INVARIANCE; SYMMETRY BREAKING; WEAK INTERACTIONS; BASIC INTERACTIONS; DOCUMENT TYPES; INTERACTIONS; INVARIANCE PRINCIPLES; MATHEMATICAL MODELS; PARTICLE MODELS; 645202* - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties; 645203 - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties

Citation Formats

Sidhu, D P. Left--right symmetric gauge theories of weak and electromagnetic interactions. United States: N. p., 1978. Web.
Sidhu, D P. Left--right symmetric gauge theories of weak and electromagnetic interactions. United States.
Sidhu, D P. Sun . "Left--right symmetric gauge theories of weak and electromagnetic interactions". United States. https://www.osti.gov/servlets/purl/6728240.
@article{osti_6728240,
title = {Left--right symmetric gauge theories of weak and electromagnetic interactions},
author = {Sidhu, D P},
abstractNote = {We review the recent progress in spontaneously broken left-right symmetric gauge theories of weak and electromagnetic interactions. Recently gauge theories based on the group SU(2)/Sub L/ x SU(2)/sub R/ x U(1) have been proposed as serious candidates for a unified description of the weak and electromagnetic interactions. Such theories have a number of attractive features which are not shared by the standard SU(2) x U(1) theories. Parity violation as well as CP-violation are spontaneous in origin and, therefore, theories are parity conserving before spontaneous breakdown of the symmetry and also afterwards at asymptotic energies. The asymmetry in low energy charged current weak interaction, i.e., predominance of left-handed charged current interactions over the right-handed ones, is a consequence of the symmetry breaking thus leading to a conceptually different picture of weak interaction at low energies. Another appealing feature of these theories is the beauty and richness of the structure of weak neutral current interactions. One can have a parity conserving structure of the neutral currents (one neutral boson (Z/sub V/) has pure vector and the other (Z/sub A/) pure axial vector coupling to quarks and leptons) which is natural in the technical sense of the word. Models of this type provide the most elegant explanation of the failure to find parity violation in atoms at the level predicted on the basis of the Weinberg-Salam model. In spite of manifestly parity conserving neutral current interactions, ..nu../sub ..mu../N and anti ..nu../sub ..mu../N (also ..nu../sub ..mu../e and anti ..nu../sub ..mu../e) neutral current cross-sections have to be unequal in these theories because of the definite parity and charge conjugation of the Z-bosons.},
doi = {},
url = {https://www.osti.gov/biblio/6728240}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

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