Putative light scalar nonet

被引：237

作者：

Black, D ^{[1
]}

Fariborz, AH

Sannino, F

Schechter, J

机构：

[1] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[2] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW D | 1999年 / 59卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.59.074026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the ''family'' relationship of a possible scalar nonet composed of the a(0)(980), the f(0)(980) and the sigma and kappa type states found in recent treatments of pi pi and pi K scattering. We work in the effective Lagrangian framework, starting from terms which yield "ideal mixing" according to Okubo's original formulation. It is noted that there is another solution corresponding to dual ideal mixing which agrees with Jaffe's picture of scalars as qq<(qq)over bar> states rather than q (q) over bar states. At the Lagrangian level there is no difference in the formulation of the two cases (other than the numerical values of the coefficients). Ln order to agree with experiment, additional mass and coupling terms which break ideal mixing are included. The resulting model turns out to be closer to dual ideal mixing than to conventional ideal mixing; the scalar mixing angle is roughly -17 degrees in a convention where dual ideal mixing is 0 degrees. [S0556-2821(99)05007-9].

引用

页数：12

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