Ioffe-time distribution of quarks in the photon

Details Ioffe-time distribution of quarks in the photon Ioffe-time distribution of quarks in the photon

1995-10-04

arxiv.org/abs/hep-ph/9510222v1

Z.Phys. A359 (1997) 157-164

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, LaTex, one uuencoded figure

Scientific paper

We have analysed the Ioffe-time distribution of quarks in virtual photons using Operator Product Expansion of the correlation function that determines the matrix element of the corresponding quark string operator. The distribution for a transversally polarised photon admits a spectral representation which can be continued to the on-shell region $p^2 =0$. The resulting model Ioffe-time distribution turns out to be larger than parametrisations of the available $F_2^{\gamma}$ data. This result is linked to the slope of the quark distribution at the origin, which comes out too large as well.

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