Hadron Structures and Perturbative QCD

Details Hadron Structures and Perturbative QCD Hadron Structures and Perturbative QCD

1999-01-13

arxiv.org/abs/hep-ph/9901284v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages in Latex. Invited talk presented at ``RCNP International School of Physics of Hadrons and QCD'', October 12-13, 1998,

Scientific paper

In the first part of this talk, I will summarize recent developments in the study of the chiral-odd spin-dependent parton distributions h_1(x,Q^2) and h_L(x,Q^2) of the nucleon, in particular, (i) Next-to- leading order Q^2 evolution of h_1(x,Q^2) and (ii) Leading order Q^2 evolution of the twist-3 distribution $h_L(x,Q^2)$ and the universal simplification of the Q^2 evolution of all the twist-3 distributions in the large $N_c$ limit. The second part of this talk will be devoted to a systematic analysis on the light-cone distribution amplitudes of vector mesons ($\rho$, $\omega$, $\phi$, $K^*$ etc) relevant for exclusive processes producing these mesons. In particular, twist-3 distribution amplitudes are discussed in detail.

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