Combined fit to BABAR and Belle Data on e+e-→φπ+π- and φf0(980)

中国物理C, 2010, 34(8): 1045-1051.

^1, , ^2,

1.University of Hawaii, Honolulu, HI 96822, USA

2.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

基金项目: Major State Basic Research Development Program(2009CB825203) Department of Energy(DE-FG02-04ER41291) National Natural Science Foundation of China(10825524;10935008)

Combined fit to BABAR and Belle Data on e+e-→φπ+π- and φf0(980)

SHEN Cheng-Ping ^1, , YUAN Chang-Zheng ^2,

1.University of Hawaii, Honolulu, HI 96822, USA

2.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Keywords： Y(2175)

A combined fit is performed to the BABAR and Belle measurements of the e+e-→φπ+π+ and φfo(980) cross sections for center-of-mass energy between threshold and 3.0 GeV. The resonance parameters of the φ(1680) and Y(2175) are determined. The mass is (1681+10-12) MeV/c2 and the width is (221+34-24) MeV/c2 for the φ(1680), and the mass is (2117+59-49) MeV/c2 and the width is (164+69-80) MeV/c2 for the Y(2175). This information will shed light on the understanding of the nature of the excited φ and Y states observed in e+e- annihilation.

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Combined fit to BABAR and Belle Data on e+e-→φπ+π- and φf0(980)

参考文献