Measurements of the Two-Photon Widths of the Charmonium States ${\eta }_c$, ${\chi }_{c0}$ and ${\chi }_{c2}$

Abstract

Using the CLEO-II detector at the CESR $e^{+}{e}^{-}$ storage ring running at the center-of-mass energy around 10.6 GeV, we have studied exclusive production of charmonium states in two-photon collisions. Employing a dataset comprising 3.0 ${\mathrm{fb}}^{-1}$ we have searched for decays of the ${\eta }_c$, ${\chi }_{c0}$ and ${\chi }_{c2}$ mesons resulting in four charged hadrons. We report on the measurements of the cross sections and two-photon widths of these charmonium states.

Comments: 7 pages, uses psfig.tex, 5 eps figures appended at the end