Published January 1, 1981
| Version v1
Journal article
Precise measurement of the ratio of the axial vector coupling to vector coupling in A0 → p + e- + anti ν
Creators
- 1. Massachusetts Univ., Amherst (USA). Dept. of Physics and Astronomy
- 2. Brookhaven National Lab., Upton, NY (USA)
Description
The ratio of the axial vector coupling constant to the vector coupling constant, /g1(0)/f1(0)/, in the process Λ0 → p + e- + ν has been measured in a high statistics study of the decay. The analysis of a sample of 10,000 events includes effects such as radiative corrections and q2 dependence of the form factors. Our result is that /g1(0)/f1(0)/ = 0.734 +- 0.031. This value combined with our previous measurement of the ratio GAMMA(Λ0 → peanti ν)/GAMMA(Λ0 → pπ-) permits the calculation of /f1(0)/ = 1.229 +- 0.035 and /g1(0)/ = 0.903 +- 0.046 in remarkable agreement with the traditional models of the weak interaction. (orig.)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 98
- Journal Issue
- 1/2
- Series
- Phys. Lett., B.
- Journal Page Range
- 123-126
- ISSN
- 0370-2693
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 12594240
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- AXIAL-VECTOR CURRENTS; BRANCHING RATIO; COUPLING CONSTANTS; EXPERIMENTAL DATA; FORM FACTORS; LAMBDA PARTICLES; SEMILEPTONIC DECAY; VECTOR CURRENTS
- Descriptors DEC
- ALGEBRAIC CURRENTS; BARYONS; CURRENTS; DATA; DECAY; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HYPERONS; INFORMATION; NUMERICAL DATA; PARTICLE DECAY; PARTICLE PROPERTIES; STRANGE PARTICLES; WEAK PARTICLE DECAY