Hadronic off-shell width of meson resonances -: art. no. 054014

被引：78

作者：

Dumm, DG ^{[1
]}

Pich, A

Portolés, J

机构：

[1] Comis Nacl Energia Atom, Dept Fis, Av Libertador 8250, RA-1429 Buenos Aires, DF, Argentina

[2] Univ Valencia Edifici Inst Invest, CSIC, IFIC, Dept Fis Teor, E-46071 Valencia, Spain

来源：

PHYSICAL REVIEW D | 2000年 / 62卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.62.054014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Within the resonance chiral effective theory we study the dressed propagators of the spin-1 fields, which arise from a Dyson-Schwinger resummation perturbatively constructed from loop diagrams with absorptive contributions in the s channel. We apply the procedure to the vector pion form factor and elastic pi pi scattering to obtain the off-shell width of the rho(0) meson. We adopt a definition of the off-shell width of spin-1 meson resonances that satisfies the requirements of analyticity, unitarity, chiral symmetry, and asymptotic behavior ruled by QCD. To satisfy these constraints the resummation procedure cannot consist only of self-energy diagrams. Our width definition is shown to be independent of the formulation used to describe the spin-1 meson resonances.

引用

页码：1 / 6

页数：6

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