K* AND K MESON POLE CONTRIBUTIONS TO LEPTONIC A DECAY

Journal Article · Tue May 01 04:00:00 EDT 1962 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.126.1216· OSTI ID:4834049

Norton, R E

An attempt is made to calculate the leptonic A decay rate on the basis of the known K/sub e3/ and K/sub mu 2/ 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 K*. In this way the vector current contribution to the A decay is related to the known K/sub e3/ rate, the known effective pi -K-K* coupling constant, and the A-p-K* coupling constant, determined from extrapolati n of the associated production data. The axial vector contribution to A decay is related to the K/sub mu 2/ 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 K meson. The numerical consequences can only be evaluated once the A-p-K* is determined, but a crude estimate suggested by unitary symmetry'' yields a leptonic A decay rate a few times smaller than is suggested experimentally. (auth)

• Research Organization: Univ. of California. Los Angeles
• NSA Number: NSA-16-022914
• OSTI ID: 4834049
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 126; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CURRENTS
DECAY
DISPERSION THEORY
K*RESONANCES
KAONS
LAMBDA PARTICLES
LEPTONS
MATRICES
NUMERICALS
PHYSICS
QUANTUM MECHANICS
RESONANCE
VECTORS