A PREDICTION OF SPIN-0 AND SPIN-2 VECTOR-MESON MOLECULES - A NEW MODEL OF THE THETA(1720)

被引：41

作者：

DOOLEY, K

SWANSON, ES

BARNES, T

机构：

[1] UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA

[2] OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831

[3] OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS,OAK RIDGE,TN 37831

来源：

PHYSICS LETTERS B | 1992年 / 275卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)91620-O

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A Born approximation calculation for vector-mesons interacting through quark- and gluon-exchange suggests that loosely bound deuteron-like "molecule" states of vector-meson pairs may occur in the (I, J(PC)) = (0, 0++), (0, 2++), (1, 0++) and (1, 2++) S-wave (K*, K (K*, K*BAR, omega-phi) and (K*K*BAR, rho-phi) systems below K*K*BAR threshold. We tentatively identify the (0, 0++) state with the theta (1720); this assignment explains several unusual properties of this resonance, including some strong branching fractions and couplings in psi-radiative decays. Tests of this model and decay channels in which we expect evidence of additional vector-meson bound states are discussed.

引用

页码：478 / 486

页数：9

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