τ→KSπ-ντ和τ→K-ηντ衰变：联合分析

τ→KSπ-ντ and τ→K-ηντ decays: A combined analysis

摘要: 利用所需的矢量和标量形状因子的色散表示，综合分析了τ →KSπ -ντ和 τ →K-ηντ衰变谱.与先前的研究相比，得到了更高精度的K(1410)共振参数，MK*′=1 304±17 MeV和ΓK*′=171±62 MeV.由于K-π0矢量形状因子与τ-→ K-ηντ衰变的描述有关，对在形状因子斜率中同位旋的破缺进行了研究.在这方面，τ-→ K-π0ντ的跃迁谱将是极为有用的.

Abstract: The decay spectra of τ-→KSπ-ντ and τ-→K-ηντ decays are studied in a combined analysis using a dispersive representation of the required vector and scalar form factors. The K*(1410) resonance parameters are extracted with improved precision as compared to previous studies, with the findings MK*′=1 304±17 MeV and ΓK*′=171±62 MeV. Isospin violations in the form factor slopes are investigated as the K-π0 vector form factor enters the description of the decay τ-→K-ηντ. In this respect, the spectrum of the transition τ-→K-π0ντ would be extremely useful.