Measurements of the Two-Photon Widths of the Charmonium States ${η_c}$, $χ_{c{\large{0}}}$ and $χ_{c{\large{2}}}$

Savinov, Vladimir; Fulton, Roger

Measurements of the Two-Photon Widths of the Charmonium States ${η_c}$, $χ_{c{\large{0}}}$ and $χ_{c{\large{2}}}$

Authors

Description

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 ${\rm fb}^{-1}$ we have searched for decays of the $η_c$, $χ_{c0}$ and $χ_{c2}$ mesons resulting in four charged hadrons. We report on the measurements of the cross sections and two-photon widths of these charmonium states.
7 pages, uses psfig.tex, 5 eps figures appended at the end