arXiv 1109.37542011-09hep-ph

赝标介子形状因子与衰变

Pseudoscalar meson form factors and decays

A. E. Dorokhov

备注：: 14 pages, 7 figures, based on the talks given at Hadron Structure 11 (Slovakia, Tatranská Štrba, June 27th - July 1st, 2011), The Actual Problems of Microworld Physics (Gomel, Belarus, August 1 - 12, 2011), International Workshop on e+e- collisions from Phi to Psi (Novosibirsk, Russia, September 19-22, 2011)
DOI：: 10.1016/j.nuclphysbps.2012.02.030

摘要：

在这篇通讯中，我们讨论了与轻赝标介子物理学的现代实验数据有关的几个主题。其中包括赝标介子对μ子反常磁矩的贡献、$g-2$、轻赝标介子到轻子对的罕见衰变、赝标介子在大动量转移时的跃迁形状因子、π介子的横向形状因子。测量μ子反常磁矩$g-2$和轻赝标介子衰变为轻子对$P\rightarrow l^{+}l^{-} $是对标准模型的重要检验。为了减少标准模型预言中的理论不确定性，轻赝标介子跃迁形状因子的数据起着重要的作用。最近，由BABAR协作提供了关于这些形状因子在大动量传递下的行为的新数据。在非定域手征夸克模型中，它展示了如何描述这些数据以及介子分布振幅如何作为动力学夸克质量和介子质量的函数而演化。

英文摘要：

In this communication we discuss few topics related with modern experimental data on the physics of light pseudoscalar mesons. It includes the contribution of the pseudoscalar mesons to the muon anomalous magnetic moment (AMM), $g-2$, the rare decays of light pseudoscalar mesons to lepton pair, the transition form factors of pseudoscalar mesons at large momentum transfer, the pion transversity form factor. Measuring the muon anomalous magnetic moment $g-2$ and the rare decays of light pseudoscalar mesons into lepton pair $P\rightarrow l^{+}l^{-} $ serve as important test of the standard model. To reduce the theoretical uncertainty in the standard model predictions the data on the transition form factors of light pseudoscalar mesons play significant role. Recently new data on behavior of these form factors at large momentum transfer was supplied by the BABAR collaboration. Within the nonlocal chiral quark model it shown how to describe these data and how the meson distribution amplitude evolves as a function of the dynamical quark masses and meson masses.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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