Leading twist distribution amplitudes of P-wave nonrelativistic mesons

Details Leading twist distribution amplitudes of P-wave nonrelativistic mesons Leading twist distribution amplitudes of P-wave nonrelativistic mesons

2008-10-20

arxiv.org/abs/0810.3607v2

Phys.Rev.D79:074004,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, minor corrections, reference updated, version to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.79.074004

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. In addition, it is found the relations between the moments of the universal function and the nonrelativistic QCD matrix elements that control relativistic corrections to any amplitude involving P-wave charmonia. Our calculation shows that characteristic size of these corrections is of order of ~30 %.

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