Next-to-leading-order predictions for D*{sup {+-}} plus jet photoproduction at DESY HERA

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.094035· OSTI ID:20705629

Heinrich, Gudrun; Kniehl, Bernd A ^[1]

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1. II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)

We study the photoproduction of a D*{sup {+-}} meson in association with a hadron jet at next-to-leading order in the parton model of QCD with nonperturbative fragmentation functions extracted from LEP1 data of e{sup +}e{sup -} annihilation. The transverse-momentum and rapidity distributions recently measured at DESY HERA in various kinematic ranges nicely agree with our theoretical predictions. This provides a useful test of the universality and the scaling violations of the fragmentation functions predicted by the factorization theorem. These comparisons also illustrate the significance of the charm component in the resolved photon. This is elaborated by investigating the cross section distributions in x{sub obs}{sup {gamma}} and cos{theta}*.

• OSTI ID: 20705629
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 9; Other Information: DOI: 10.1103/PhysRevD.70.094035; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPARATIVE EVALUATIONS
D*-2010 MESONS
DISTRIBUTION
ELECTRON-POSITRON INTERACTIONS
FACTORIZATION
HERA STORAGE RING
JET MODEL
PARTICLE RAPIDITY
PARTON MODEL
PHOTONS
PHOTOPRODUCTION
QUANTUM CHROMODYNAMICS
TRANSVERSE MOMENTUM