Radiative decay of ρ0 and φ mesons in a chiral unitary approach

被引：102

作者：

Marco, E ^{[1
]}

Hirenzaki, S

Oset, E

Toki, H

机构：

[1] Osaka Univ, Nucl Phys Res Ctr, Ibaraki, Osaka 5670047, Japan

[2] Univ Valencia, Dept Fis Teor, CSIC, E-46100 Burjassot, Spain

[3] Nara Womens Univ, Dept Phys, Nara 6308506, Japan

来源：

PHYSICS LETTERS B | 1999年 / 470卷 / 1-4期

关键词：

D O I：

10.1016/S0370-2693(99)01205-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the rho(0) and phi decays into pi(+) pi(-)gamma, pi(0)pi(0)gamma and phi into pi(0)eta gamma using a chiral unitary approach to deal with the final state interaction of the MM system. The final state interaction modifies only moderately the large momenta tail of the photon spectrum of the rho(0)--> pi(+)pi(-)gamma decay. In the case of phi decay the contribution to pi(+) pi(-)gamma and pi(0)pi(0)gamma decay proceeds via kaonic loops and gives a distribution of pi pi invariant masses in which the f(0)(980) resonance shows up with a very distinct peak. The spectrum found for phi--> pi(0)pi(0)gamma decay agrees with the recent experimental results obtained at Novosibirsk. The branching ratio for phi--> pi(0)pi(0)gamma, dominated by the alpha(0)(980), is also in agreement with recent Novosibirsk results. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：20 / 26

页数：7

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