Analytical formula for the cross section of hadron production from $e^{+}{e}^{-}$ collisions around the narrow charmouinum resonances

Yanan Wang, Yadi Wang, Ping Wang

The paper reports an analytical formula for the production cross section of $e^{+}{e}^{-}$ annihilation to hadrons in the vicinity of a narrow resonance, particularly in the $\ddot{I}„$-cha…