Vector form factor of the pion:: A model-independent approach

被引：13

作者：

Pich, A ^{[1
]}

Portolés, J ^{[1
]}

机构：

[1] Univ Valencia, CSIC, IFIC, Dept Fis Teor, E-46071 Valencia, Spain

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2003年 / 121卷

关键词：

D O I：

10.1016/S0920-5632(03)01841-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study a model-independent paxameterization of the vector pion form factor that arises from the constraints of analyticity and unitarity. Our description should be suitable up to roots similar or equal to 1.2 GeV and allows a model-independent determination of the mass of the p(770) resonance. We analyse the experimental data on tau(-) --> pi(-)pi(0)nu(tau) and e(+)e(-) --> pi(+)pi(-) in this framework, and its consequences on the low-energy observables worked out by chiral perturbation theory. An evaluation of the two pion contribution to the anomalous magnetic moment of the muon, a(mu), and to the fine structure constant, alpha(M-z(2)), is also performed.

引用

页码：179 / 182

页数：4

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