利用KLOE探测器在φ介子质量区域研究e+e- → ωπ0过程
高能物理 - 实验
2008-11-26 v2
摘要
我们利用在DAFNE上使用KLOE探测器收集的约600 pb^-1的样本，通过π+π-π0π0和π0π0γ末态，研究了sqrt(s)区间1000-1030 MeV内的e+e- → ωπ0截面。通过拟合两个末态在M_φ附近的观测干涉图样，我们提取了衰变宽度比Γ(ω→π0γ)/Γ(ω→π+π-π0)=0.0897±0.0016，并推导出分支比BR(ω→π+π-π0)=(90.24±0.19)%，BR(ω→π0γ)=(8.09±0.14)%。描述M_φ附近e+e- → ωπ0反应的参数也用于提取OZI和G宇称破坏的φ→ωπ0衰变的分支比：BR(φ→ωπ0)=(4.4±0.6)×10^-5。
引用
@article{arxiv.0807.4909,
title = {Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector},
author = {The KLOE Collaboration and F. Ambrosino and A. Antonelli and M. Antonelli and F. Archilli and P. Beltrame and G. Bencivenni and S. Bertolucci and C. Bini and C. Bloise and S. Bocchetta and F. Bossi and P. Branchini and P. Campana and G. Capon and T. Capussela and F. Ceradini and P. Ciambrone and F. Crucianelli and E. De Lucia and A. De Santis and P. De Simone and G. De Zorzi and A. Denig and A. Di Domenico and C. Di Donato and B. Di Micco and M. Dreucci and G. Felici and M. L. Ferrer and S. Fiore and P. Franzini and C. Gatti and P. Gauzzi and S. Giovannella and E. Graziani and W. Kluge and G. Lanfranchi and J. Lee-Franzini and D. Leone and M. Martini and P. Massarotti and S. Meola and S. Miscetti and M. Moulson and S. Müller and F. Murtas and M. Napolitano and F. Nguyen and M. Palutan and E. Pasqualucci and A. Passeri and V. Patera and F. Perfetto and P. Santangelo and B. Sciascia and A. Sciubba and A. Sibidanov and T. Spadaro and M. Testa and L. Tortora and P. Valente and G. Venanzoni and R. Versaci and G. Xu},
journal= {arXiv preprint arXiv:0807.4909},
year = {2008}
}
备注
12 Pages, 4 figures, submitted to Physics Letter B