Search for the y (4140) via e+e- ???J /? at s =4.23, 4.26 and 4.36 GeV
Özet
Using data samples collected at center-of-mass energies s=4.23, 4.26, and 4.36 GeV with the BESIII detector operating at the BEPCII storage ring, we search for the production of the charmoniumlike state Y(4140) through a radiative transition followed by its decay to ?J/?. No significant signal is observed and upper limits on ?[e+e-??Y(4140)]·B(Y(4140)??J/?) at the 90% confidence level are estimated as 0.35, 0.28, and 0.33 pb at s=4.23, 4.26, and 4.36 GeV, respectively. © 2015 American Physical Society.
