Prompt atmospheric neutrinos and muons: NLO vs LO QCD predictions

Details Prompt atmospheric neutrinos and muons: NLO vs LO QCD predictions Prompt atmospheric neutrinos and muons: NLO vs LO QCD predictions

1999-04-26

arxiv.org/abs/hep-ph/9904457v1

Phys.Rev.D61:036005,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages including 6 figures

Scientific paper

10.1103/PhysRevD.61.036005

We compare the leading and next-to-leading order QCD predictions for the flux of atmospheric muons and neutrinos from decays of charmed particles. We find that the full NLO lepton fluxes can be approximated to within 10% by the Born--level fluxes multiplied by an overall factor of 2.2-2.4, which depends slightly on the PDF. This supports the approach in Thunman, Ingelman, Gondolo (1996). We also find that their very low lepton fluxes are due to the mild slope they used for the gluon distribution function at small momentum fractions, and that substantially larger lepton fluxes result when the slope of the gluon distribution function at small momentum fractions is larger.

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