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

Abstract: 

A combined fit is performed to the BABAR and Belle measurements of the e⁺e^－→φπ⁺π^－ and φf₀(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.