Diffractive vector mesons beyond the s-channel helicity conservation
高能物理 - 唯象学
2009-10-31 v2
摘要
We derive a full set, and determine the twist, of helicity amplitudes for diffractive production of light to heavy vector mesons in deep inelastic scattering. For large all helicity amplitudes but the double-flip are calculable in perturbative QCD and are proportional to the gluon structure function of the proton at a similar hard scale. We find a substantial breaking of the -channel helicity conservation which must persist also in real photoproduction.
引用
@article{arxiv.hep-ph/9809539,
title = {Diffractive vector mesons beyond the s-channel helicity conservation},
author = {E. V. Kuraev and N. N. Nikolaev and B. G. Zakharov},
journal= {arXiv preprint arXiv:hep-ph/9809539},
year = {2009}
}
备注
7 pages, 1 postscript figure. Discussion of double-flip updated, typos corrected, reference to the ZEUS, H1, HERMES presentations at ICHEP-98 added