# Weak currents and Z/sup 0/ production in left-right--symmetric gauge models

## Abstract

We present the pheomenology of SU(2)/sub L/ x SU(2)/sub R/ x U(1)/sub L/ x U(1)/sub R/ gauge models of the weak and electromagnetic interactions in a simple parametric form, based on the eigenvectors of the intermediate-vector-boson mass matrix. The neutral-current interactions are described in general by four angles and three Z/sup 0/ masses. For natural extinction of atomic physics parity violation, one Z boson has pure vector couplings, the other two pure axial-vector couplings. Imposing equivalence with the neutrino scattering phenomenology of the Weinberg-Salam model, only one parameter remains; this degree of freedom allows an axial-vector Z boson to have low mass. The observable consequences of a light Z/sup 0/ are explored for e/sup +/e/sup -/ annihilation, Drell-Yan production of lepton pairs, deep-inelastic lepton scattering by neutral currents, and the anomalous magnetic moment of the muon. A Z mass as low as 30 GeV is compatible with existing measurements; the most stringent present limit is set by the muon magnetic moment. We estimate a Z/sub 3/(30) signal would be about 10% of the UPSILON (9.5) signal in pp ..-->.. ..mu../sup +/..mu../sup -/X at top CERN ISR energies ..sqrt..s = 60 GeV, and that Z/sub 3/(30) would give a - 13%more »

- Authors:

- Publication Date:

- Research Org.:
- Physics Department, University of Wisconsin, Madison, Wi. 53706

- OSTI Identifier:
- 6680892

- Resource Type:
- Journal Article

- Journal Name:
- Phys. Rev., D; (United States)

- Additional Journal Information:
- Journal Volume: 18:3

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-POSITRON INTERACTIONS; ANNIHILATION; INTERMEDIATE VECTOR BOSONS; PARTICLE PRODUCTION; MUONS; PAIR PRODUCTION; UNIFIED GAUGE MODELS; DEEP INELASTIC SCATTERING; DRELL MODEL; EIGENVECTORS; ELECTROMAGNETIC INTERACTIONS; NEUTRAL-CURRENT INTERACTIONS; SU-2 GROUPS; U-1 GROUPS; VACUUM STATES; WEAK INTERACTIONS; BASIC INTERACTIONS; BOSONS; ELEMENTARY PARTICLES; FERMIONS; INELASTIC SCATTERING; INTERACTIONS; INTERMEDIATE BOSONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LEPTONS; LIE GROUPS; MATHEMATICAL MODELS; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; SCATTERING; SU GROUPS; SYMMETRY GROUPS; U GROUPS; 645202* - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties; 645203 - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties

### Citation Formats

```
Barger, V, and Phillips, R J.N.
```*Weak currents and Z/sup 0/ production in left-right--symmetric gauge models*. United States: N. p., 1978.
Web. doi:10.1103/PhysRevD.18.775.

```
Barger, V, & Phillips, R J.N.
```*Weak currents and Z/sup 0/ production in left-right--symmetric gauge models*. United States. https://doi.org/10.1103/PhysRevD.18.775

```
Barger, V, and Phillips, R J.N. Tue .
"Weak currents and Z/sup 0/ production in left-right--symmetric gauge models". United States. https://doi.org/10.1103/PhysRevD.18.775.
```

```
@article{osti_6680892,
```

title = {Weak currents and Z/sup 0/ production in left-right--symmetric gauge models},

author = {Barger, V and Phillips, R J.N.},

abstractNote = {We present the pheomenology of SU(2)/sub L/ x SU(2)/sub R/ x U(1)/sub L/ x U(1)/sub R/ gauge models of the weak and electromagnetic interactions in a simple parametric form, based on the eigenvectors of the intermediate-vector-boson mass matrix. The neutral-current interactions are described in general by four angles and three Z/sup 0/ masses. For natural extinction of atomic physics parity violation, one Z boson has pure vector couplings, the other two pure axial-vector couplings. Imposing equivalence with the neutrino scattering phenomenology of the Weinberg-Salam model, only one parameter remains; this degree of freedom allows an axial-vector Z boson to have low mass. The observable consequences of a light Z/sup 0/ are explored for e/sup +/e/sup -/ annihilation, Drell-Yan production of lepton pairs, deep-inelastic lepton scattering by neutral currents, and the anomalous magnetic moment of the muon. A Z mass as low as 30 GeV is compatible with existing measurements; the most stringent present limit is set by the muon magnetic moment. We estimate a Z/sub 3/(30) signal would be about 10% of the UPSILON (9.5) signal in pp ..-->.. ..mu../sup +/..mu../sup -/X at top CERN ISR energies ..sqrt..s = 60 GeV, and that Z/sub 3/(30) would give a - 13% asymmetry in e/sup +/e/sup -/ ..-->.. ..mu../sup +/..mu../sup -/ at top SPEAR energies ..sqrt..s = 7.5 GeV.},

doi = {10.1103/PhysRevD.18.775},

url = {https://www.osti.gov/biblio/6680892},
journal = {Phys. Rev., D; (United States)},

number = ,

volume = 18:3,

place = {United States},

year = {1978},

month = {8}

}