Combined fit to BaBar and Belle Data on e+e- to phi pi+ pi- and phi f0(980)
Shen, C. P. · Yuan, C. Z.
Original · EN
A combined fit is performed to the BaBar and Belle measurements of the → ϕπ+ π- and ϕ 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). These information will shed light on the understanding of the nature of the excited ϕ and Y states observed in annihilation.
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