  Leading twist light cone distribution amplitudes (LCDAs) are key ingredients
in calculating various hadronic amplitudes using light cone QCD sum rules. This
work concentrates on calculating the leading twist LCDAs of P-wave heavy
quarkonia. Quark model wavefunctions for the ground, first and second excited
states of P-wave charmonia and bottomonia have been calculated, and are used
for calculating the relevant LCDAs and leptonic decay constants.
