Parton distributions in the photon
May, 199432 pages
Published in:
- Z.Phys.C 64 (1994) 621-630
e-Print:
- hep-ph/9406382 [hep-ph]
DOI:
Report number:
- LPTHE-ORSAY-93-37,
- ENSLAPP-A-435-93,
- ENSLAPP-A-435-93-REV,
- LPTHE-ORSAY-93-37-REV
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Abstract: (arXiv)
We discuss in detail the photon structure function beyond the leading logarithm approximation. Of special concern is the factorization scheme and the hadronic input; we show how to naturally absorb large terms due to the MSbar factorization scheme in a modified hadronic component. The effect of the charm quark mass threshold is also discussed in relation to the phenomenology. A comparison with data shows that the modified hadronic component can be reasonably described by a VDM-type input.Note:
- Revised version
- photon: structure function
- momentum spectrum: parton
- DGLAP equation
- factorization
- effect: nonperturbative
- vector dominance
- quark: charm
- threshold
- numerical calculations: interpretation of experiments
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