Speaker
Fabio Anulli
(Universita e INFN, Roma I (IT))
Description
We report on a search for new $\pi^0$-like particles produced in association with a tau-lepton pair at BABAR. Those objects, with mass and decay modes similar to those of a neutral pion, could provide an explanation for the apparent non-asymptotic behavior of the pion-photon transition form factor, as observed by BABAR. No significant signal is observed, and limits on the production cross sections are found to lie below the values needed to explain the excess with respect to the asymptotic limit observed in the form factor data.
Author
Fabio Anulli
(Universita e INFN, Roma I (IT))
