K*andKMeson Pole Contributions to LeptonicΛDecay
- 1 May 1962
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 126 (3), 1216-1219
- https://doi.org/10.1103/physrev.126.1216
Abstract
An attempt is made to calculate the leptonic decay rate on the basis of the known and decay rates. Unsubtracted dispersion relations are written for the relevant matrix elements of the strangeness-changing vector weak current and the absorptive parts are approximated by retaining only the contribution from the . In this way the vector current contribution to the decay is related to the known rate, the known effective coupling constant, and the as yet unknown coupling constant. The latter coupling constant will hopefully be determined soon from extrapolation of the associated production data. The axial vector contribution to decay is related to the decay rate by writing unsubtracted dispersion relations for the divergence of this current and approximating the absorptive parts by keeping only the contribution of the meson. The numerical consequences of this calculation can only be evaluated once the is determined, but a crude estimate suggested by "unitary symmetry" yields a leptonic decay rate a few times smaller than is now suggested experimentally.
Keywords
This publication has 12 references indexed in Scilit:
- Evidence for Low Rates forβDecay ofΣ−andΛHyperonsPhysical Review Letters, 1961
- Resonance in theSystemPhysical Review Letters, 1961
- Partially Conserved Currents and theK′MesonPhysical Review Letters, 1960
- On the renormalization of the axial vector coupling constant in β-decayIl Nuovo Cimento (1869-1876), 1960
- The axial vector current in beta decayIl Nuovo Cimento (1869-1876), 1960
- Form Factors inKμ3andKe3DecayPhysical Review B, 1959
- Photoproduction ofK+MesonsPhysical Review B, 1959
- Mu Capture, Beta Decay, and Pi-Meson DecayReviews of Modern Physics, 1959
- Decay of the Pi MesonPhysical Review B, 1958
- Theory of the Fermi InteractionPhysical Review B, 1958