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Title: Nonleptonic weak decays of mesons

Abstract

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.more » We comment that the ..delta..I = 1/2 rule for hyperon decays is easily understood in the model.« less

Authors:
Publication Date:
Research Org.:
Institute of Physics, University of Tsukuba, Ibaraki 305, Japan
OSTI Identifier:
6313800
Resource Type:
Journal Article
Journal Name:
Phys. Rev. D; (United States)
Additional Journal Information:
Journal Volume: 24:3
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARMED MESON RESONANCES; WEAK HADRONIC DECAY; KAONS; BRANCHING RATIO; EXCLUSIVE INTERACTIONS; INCLUSIVE INTERACTIONS; LIFETIME; SU-3 GROUPS; SYMMETRY BREAKING; BOSONS; CHARM PARTICLES; DECAY; ELEMENTARY PARTICLES; HADRONS; INTERACTIONS; LIE GROUPS; MESON RESONANCES; MESONS; PARTICLE DECAY; PARTICLE INTERACTIONS; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; RESONANCE PARTICLES; STRANGE PARTICLES; SU GROUPS; SYMMETRY GROUPS; WEAK PARTICLE DECAY; 645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties

Citation Formats

Kobayashi, T. Nonleptonic weak decays of mesons. United States: N. p., 1981. Web. doi:10.1103/PhysRevD.24.662.
Kobayashi, T. Nonleptonic weak decays of mesons. United States. https://doi.org/10.1103/PhysRevD.24.662
Kobayashi, T. Sat . "Nonleptonic weak decays of mesons". United States. https://doi.org/10.1103/PhysRevD.24.662.
@article{osti_6313800,
title = {Nonleptonic weak decays of mesons},
author = {Kobayashi, T},
abstractNote = {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.},
doi = {10.1103/PhysRevD.24.662},
url = {https://www.osti.gov/biblio/6313800}, journal = {Phys. Rev. D; (United States)},
number = ,
volume = 24:3,
place = {United States},
year = {1981},
month = {8}
}