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arXiv · hep-ph/0107077

Second moment of quark structure function of the rho-meson in QCD sum rules

A. Oganesian·A. Samsonov
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Abstract

The second moments of the quark structure functions of the longitudinally and transversally polarized rho-mesons are calculated in the framework of QCD sum rules in external fields. Operators of dimension 4 and 6 are taken into account. The results are: 0.84 for the longitudinal polarization, 0.5 for the transversal polarization. The large difference between these values indicates that the rho-meson polarization strongly influences the internal structure. In particular, in the case of the longitudinally polarized rho-meson the gluon sea is found to be strongly suppressed, it is less than 0.20 - 0.25, whereas in usual hadron case -- about 0.4 - 0.5.

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A. Oganesian, A. Samsonov. 2001-07-13. Second moment of quark structure function of the rho-meson in QCD sum rules. https://doi.org/10.1088/1126-6708%2F2001%2F09%2F002

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