NONRESONANT 3-BODY DECAYS OF CHARMED MESONS

被引：12
作者：
CHAU, LL
CHENG, HY
机构：
[1] UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR SCI,LOS ALAMOS,NM 87545
[2] ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN
来源：
PHYSICAL REVIEW D | 1990年 / 41卷 / 05期
关键词：
D O I：
10.1103/PhysRevD.41.1510
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Nonresonant three-body decays of charmed mesons are first studied in the approach of effective SU(4) × SU(4) chiral Lagrangians. It is pointed out that the predictions of the branching ratios in chiral perturbation theory are in general too small when compared with experiment. However, the experimental results are comprehensible in the general framework of the quark-diagram scheme. The existence of a sizable W-annihilation amplitude, which is evident by the observation of Ds+'(++-)NR, is the key toward an understanding of the three-body nonresonant decays of D+ and Ds+. The measurement of D0'K»0K+K- and D0'K»0+- indicates that color suppression is not effective in the three-body decay. Based on the quark-diagram analysis, predictions for some other nonresonant modes are given. © 1990 The American Physical Society.
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页码：1510 / 1516
页数：7
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