The hidden charm decay of Y (4140) by the rescattering mechanism

Abstract

Assuming that Y (4140) is the second radial excitation of the P-wave charmonium χc J″ (J = 0, 1), the hidden charm decay mode of Y (4140) is calculated in terms of the rescattering mechanism. Our numerical results show that the upper limit of the branching ratio of the hidden charm decay Y (4140) → J / ψ φ{symbol} is on the order of 10- 4 - 10- 3 for both of the charmonium assumptions for Y (4140), which disfavors the large hidden charm decay pattern indicated by the CDF experiment. It seems to reveal that the pure second radial excitation of the P-wave charmonium χc J″ (J = 0, 1) is problematic. © 2009 Elsevier B.V. All rights reserved.