PARITY OF THE K MESON AND THE $lambda$ BETA-DECAY BRANCHING RATIO

Journal Article · Mon Jun 15 04:00:00 EDT 1959 · Phys. Rev'

DOI:https://doi.org/10.1103/PhysRev.114.1648· OSTI ID:4224477

Albright, C H

The related problems of LAMBDA A beta decay and K/sub mu 2/ decay (via a LAMBDA -antiproton loop) are studied. Dispersion techniques are used to calculate the vector (axial vector) Fermi interaction coupling constant from the known K/sub mu 2/ lifetime and reasonable values of the strong coupling constant for the scalar (pseudoscalar) K case. Each weak coupling constant is then used to place a lower limit on the A beta-decay branching ratio with the result that the limit with a pseudoscalar K is more than one order of magnitude smaller than that with a scalar K meson. The experimental information is essentially consistent with either K parity, for the observed branching ratio is approximately equal to the lower limit predicted for the scalar K case. (auth) The partial lifetime of K yields mu + nu is calculated by dispersion techniques assuming that the K meson is pseudoscalar and that the relevant Fermi interactions arc of the V-A type. The results are compared with experiments and it is concluded that the renormalized axial vector coupling which is responsible for the leptonic decay of hyperons is much smaller than the usual universal Fermi interaction. (auth)

• Research Organization: Princeton Univ., N.J.
• NSA Number: NSA-13-022813
• OSTI ID: 4224477
• Journal Information: Phys. Rev', Journal Name: Phys. Rev' Vol. Vol: 114
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANTIPROTONS
BETA DECAY
BRANCHING RATIO
COUPLING
DECAY
FERMIONS
FIELD THEORY
HALF-LIFE
INTERACTIONS
KAONS
LAMBDA PARTICLES
MUONS
PARITY
PHYSICS AND MATHEMATICS
VECTORS