Nonleptonic weak decays of mesons

Journal Article · Sat Aug 01 04:00:00 EDT 1981 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.24.662· OSTI ID:6313800

Kobayashi, T

A unified view for nonleptonic decays of mesons is presented on the basis of a model introduced for interpreting the enhancement of D- and K-meson decay. We show that inclusive and exclusive nonleptonic decays of mesons can be described in a unified picture and the enhancements in inclusive decays are closely related to two-body decays (0/sup -/0/sup -/ decays). The model is applied to the decays of K, charmed, and B mesons and predicts the values (GAMMA(K/sup +/..--> pi../sup +/..pi../sup 0/))/sup -1/approx. =6.2 x 10/sup -8/ sec (expt. 5.9 x 10/sup -8/ sec), tau/sup +//tau/sup 0/approx. =3--6, tau/sup tsF//tau/sup 0/approx. =1.3--1.5, B(B/sup 0/..-->..e..nu..X)approx. =7--12%, B(B/sup -/..-->..e..nu..X)approx. =(10--12)%, where tau/sup 0/ (tau/sup +/,tau/sup tsF/) is the lifetime of the D/sup 0/ (D/sup +/,F) meson and B(A..-->..e..nu..X) stands for the semileptonic branching ratio. The large difference between the ratios, GAMMA(D/sup 0/..-->..K-bar/sup 0/..pi../sup 0/)/GAMMA(D/sup 0/..-->..K/sup -/..pi../sup +/) approx. =0.7/sup +0.7//sub -0.4/ and GAMMA(D/sup 0/..-->..K-bar/sup 0/rho/sup 0/)/GAMMA(D/sup 0/..-->..K/sup -/rho/sup +/) approx. =0.01/sup +0.10//sub -0.01/, is naturally understood as the difference between the s-wave decays and the p-wave decays. We also point out that the model can include many of the models proposed up to this point, e.g., W-exchange model, quark-number-conservation model, penguin diagram, etc. We comment that the ..delta..I = 1/2 rule for hyperon decays is easily understood in the model.

• Research Organization: Institute of Physics, University of Tsukuba, Ibaraki 305, Japan
• OSTI ID: 6313800
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 24:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED MESON RESONANCES
DECAY
ELEMENTARY PARTICLES
EXCLUSIVE INTERACTIONS
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
KAONS
LIE GROUPS
LIFETIME
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
STRANGE PARTICLES
SU GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY