Leading twist distribution amplitudes of P-wave nonrelativistic mesons

Understand

This paper is devoted to the study of the leading twist distribution amplitudes of P-wave nonrelativistic mesons.

• It is shown that at the leading order approximation in relative velocity of quark-antiquark pair inside the mesons these distribution amplitudes can be expressed through one universal function.
• As an example, the distribution amplitudes of the P-wave charmonia mesons are considered.
• Within QCD sum rules the model for the universal function of P-wave charmonia mesons is built.