Universal form factor for exclusive production of pairs of heavy mesons in photon-photon interactions
Kiselev V. V.
Equations which relate the form factors for the production of vector and pseudoscalar states at intermediate energies are derived. The derivation is carried out in the leading approximation in the reciprocal mass of the heavy quark. These equations are independent of the flavor of the heavy quark. © 1995 American Institute of Physics.