New parton distribution functions for the photon

We present new improved parton distributions for the photon. We fit all available data on the photon structure function, F 2 γ ( x, Q 2), with Q 2 ⩾ 3 GeV 2, in order to determine the quark distributions. We also pay particular attention to the gluon distribution in the photon, g γ(x),Q 2) which has...

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Bibliographic Details
Published in:Nuclear physics. B 1997-03, Vol.489 (1), p.405-423
Main Authors: Gordon, L.E., Storrow, J.K.
Format: Article
Language:English
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Summary:We present new improved parton distributions for the photon. We fit all available data on the photon structure function, F 2 γ ( x, Q 2), with Q 2 ⩾ 3 GeV 2, in order to determine the quark distributions. We also pay particular attention to the gluon distribution in the photon, g γ(x),Q 2) which has been poorly constrained in earlier analyses which only include structure function data. We use large PT jet production in yy collisions from TRISTAN to constrain g γ . We also see what information can be gleaned from yp collisions at HERA on g γ and on the quark distributions at large x, where there are no structure function data. We review future prospects of elucidating the parton distributions of the photon.
ISSN:0550-3213
1873-1562
DOI:10.1016/S0550-3213(97)00048-5