Gluon and charm distributions in the photon

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.3197· OSTI ID:6547624

Hagiwara, K; Tanaka, M; Watanabe, I ^[1]; Izubuchi, T ^[2]

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1. Theory Group, KEK, Tsukuba, Ibaraki 305 (Japan)
2. Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)

We study systematically the sensitivity of the photon structure function data on the gluon contents of the photon, by using the leading order Altarelli-Parisi (AP) equations. The charm quark contribution is studied in the quark parton model and by using the massive quark AP equations of Glueck, Hoffmann, and Reya. The present photon structure function data are found to allow a wide range of gluon distributions in the photon. We give a set of six scale-dependent parton distributions in the photon (WHIT1 to WHIT6), which have systematically different gluon contents. The sensitivity of the structure function at small [ital x] and that of the total charm quark production cross section to the effective gluon distribution are discussed.

• OSTI ID: 6547624
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:7; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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662310 -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARM PARTICLES
COMPOSITE MODELS
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
FUNCTIONS
GLUONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE MODELS
PARTON MODEL
PHOTONS
POSTULATED PARTICLES
QUARKS
SENSITIVITY
STRUCTURE FUNCTIONS