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Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD

We discuss the calculation of F_2^{\gamma}({\rm charm}) to next-to-leading order (NLO) in QCD, including contributions from both hadronlike and pointlike photons. We show that the former dominates strongly below x\simeq 0.01, and the latter above this value. This fact makes F_2^{\gamma}({\rm charm})...

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Detalles Bibliográficos
Autores principales: Laenen, Eric, Riemersma, Stephan
Lenguaje:eng
Publicado: 1995
Materias:
Acceso en línea:http://cds.cern.ch/record/281331
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author Laenen, Eric
Riemersma, Stephan
author_facet Laenen, Eric
Riemersma, Stephan
author_sort Laenen, Eric
collection CERN
description We discuss the calculation of F_2^{\gamma}({\rm charm}) to next-to-leading order (NLO) in QCD, including contributions from both hadronlike and pointlike photons. We show that the former dominates strongly below x\simeq 0.01, and the latter above this value. This fact makes F_2^{\gamma}({\rm charm}) for x \geq 0.01 calculable, whereas for x \leq 0.01 it serves to constrain the small-x gluon density in the photon. Both ranges in x are accessible at LEP2. Theoretical uncertainties are well under control. We present rates for single-tag events for the process for e^+e^- \rightarrow e^+e^- c X for LEP2. Although these event rates are small, we believe a measurement of F_2^{\gamma}({\rm charm}) is feasible.
id cern-281331
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1995
record_format invenio
spelling cern-2813312020-07-23T02:50:33Zhttp://cds.cern.ch/record/281331engLaenen, EricRiemersma, StephanCharm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCDParticle Physics - PhenomenologyWe discuss the calculation of F_2^{\gamma}({\rm charm}) to next-to-leading order (NLO) in QCD, including contributions from both hadronlike and pointlike photons. We show that the former dominates strongly below x\simeq 0.01, and the latter above this value. This fact makes F_2^{\gamma}({\rm charm}) for x \geq 0.01 calculable, whereas for x \leq 0.01 it serves to constrain the small-x gluon density in the photon. Both ranges in x are accessible at LEP2. Theoretical uncertainties are well under control. We present rates for single-tag events for the process for e^+e^- \rightarrow e^+e^- c X for LEP2. Although these event rates are small, we believe a measurement of F_2^{\gamma}({\rm charm}) is feasible.We discuss the calculation of $F_2~{\gamma}({\rm charm})$ to next-to-leading order (NLO) in QCD, including contributions from both hadronlike and pointlike photons. We show that the former dominates strongly below $x\simeq 0.01$, and the latter above this value. This fact makes $F_2~{\gamma}({\rm charm})$ for $x \geq 0.01$ calculable, whereas for $x \leq 0.01$ it serves to constrain the small-$x$ gluon density in the photon. Both ranges in $x$ are accessible at LEP2. Theoretical uncertainties are well under control. We present rates for single-tag events for the process for $e~+e~- \rightarrow e~+e~- c X$ for LEP2. Although these event rates are small, we believe a measurement of $F_2~{\gamma}({\rm charm})$ is feasible.hep-ph/9505230CERN-TH-95-103SMU-HEP-95-02CERN-TH-95-103SMU-HEP-95-02oai:cds.cern.ch:2813311995-05-04
spellingShingle Particle Physics - Phenomenology
Laenen, Eric
Riemersma, Stephan
Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD
title Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD
title_full Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD
title_fullStr Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD
title_full_unstemmed Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD
title_short Charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in QCD
title_sort charm production in deep-inelastic e$\gamma$ scattering to next-to-leading order in qcd
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/281331
work_keys_str_mv AT laeneneric charmproductionindeepinelasticegammascatteringtonexttoleadingorderinqcd
AT riemersmastephan charmproductionindeepinelasticegammascatteringtonexttoleadingorderinqcd