Abstract
We report the results of a search for decay to or in and decays. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy collider operating at center-of-mass energy 10.58 GeV, and the sample corresponds to an integrated luminosity of . Each mass distribution exhibits clear and signals, and the efficiency-corrected spectrum is well described by a superposition of the associated Breit-Wigner intensity distributions, together with an -wave contribution obtained from the LASS scattering amplitude measurements. Each angular distribution varies significantly in structure with mass, and is represented in terms of low-order Legendre polynomial moments. We find that each or mass distribution is well described by the reflection of the measured mass and angular distribution structures. We see no significant evidence for a signal for any of the processes investigated, neither in the total or mass distribution, nor in the corresponding distributions for the regions of mass for which observation of the signal was reported. We obtain branching-fraction upper limits , , , and at 95% confidence level, where the mass and width have been fixed to the reported central values.
30 More- Received 5 November 2008
DOI:https://doi.org/10.1103/PhysRevD.79.112001
©2009 American Physical Society