Published May 1, 1985
| Version v1
Journal article
New results on the reaction e+e-→μ+μ- at √s = 29 GeV
Creators
- 1. Argonne National Laboratory, Argonne, Illinois 60439
Description
We have measured the processe+e-→μ+μ- at √s = 29 GeV using the High Resolution Spectrometer at SLAC PEP. The forward-backward charge asymmetry is A/sub mumu/ = -(4.9 +- 1.5 +- 0.5)% based on 5057 events. A subsample of 3488 μ+μ- events in the angular range Vertical BarcosthetaVertical Bar<0.55 gives a cross-section ratio of R/sub mumu/ = 0.990 +- 0.017 +- 0.030. The resulting couplings of the weak neutral current are g/sub a//sup e/g/sub a//sup μ/ = 0.208 +- 0.064 +- 0.021 and g/sub v//sup e/g/sub v//sup μ/ = 0.027 +- 0.051 +- 0.089. The QED cutoff parameters are Λ/sub +/>170 GeV and Λ/sub -/>146 GeV at 95% C.L
Additional details
Publishing Information
- Journal Title
- Phys. Rev., D
- Journal Volume
- 31
- Journal Issue
- 9
- Series
- Phys. Rev., D.
- Journal Page Range
- 2352-2355
- ISSN
- 0556-2821
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 16076515
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ANNIHILATION; BRANCHING RATIO; CHERENKOV COUNTERS; ELECTROMAGNETIC INTERACTIONS; ELECTRON-POSITRON INTERACTIONS; GEV RANGE 10-100; MONTE CARLO METHOD; MUON PAIRS; PAIR PRODUCTION; TIME-OF-FLIGHT METHOD; WEAK INTERACTIONS
- Descriptors DEC
- BASIC INTERACTIONS; ENERGY RANGE; GEV RANGE; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MEASURING INSTRUMENTS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; RADIATION DETECTORS