Combined fit to BABAR and Belle Data on e+e− → phiπ+π− and phif0 (980)

A combined fit is performed to the BABAR and Belle measurements of the e+e− → π+π− and f0(980) cross sections for center-of-mass energy between threshold and 3.0 GeV. The resonance parameters of the (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 43(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 and Y states observed in e+e− annihilation.