Is the anomalous decay ratio of DsJ(2632) due to isospin breaking? -: art. no. 054009

被引：35

作者：

Maiani, L ^{[1
]}

Piccinini, F

Polosa, AD

Riquer, V

机构：

[1] Univ Roma La Sapienza, Rome, Italy

[2] Ist Nazl Fis Nucl, Rome, Italy

[3] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[4] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[5] Ctr Studi & Ric E Fermi, I-00184 Rome, Italy

[6] CERN, Theory Dept, CH-1211 Geneva, Switzerland

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.70.054009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Quark pair annihilation into gluons is suppressed at large momenta due to the asymptotic freedom. As a consequence, mass eigenvalues of heavy states should be almost diagonal with respect to up and down quark masses, thereby breaking isospin. We suggest the particle observed by the SELEX Collaboration, D-sJ(2632), to be to a good extent a [cd][(d) over bar(s) over bar] state, which would explain why its (DK+)-K-0 mode is anomalously suppressed with respect to D(s)(+)eta. Predictions for the rates of the yet unobserved modes D(s)(+)pi(0) and (D+K0) are given.

引用

页码：054009 / 1

页数：3

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