Scaling violations in inclusive <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> annihilation spectra

C. Peterson; D. Schlatter; I. Schmitt; P. M. Zerwas

doi:10.1103/PhysRevD.27.105

Scaling violations in inclusive $e^{+} e^{-}$ annihilation spectra

C. Peterson^*, D. Schlatter, I. Schmitt^†, and P. M. Zerwas^‡

Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305

^*On leave from NORDITA, Copenhagen, Denmark.
^†On leave from Universität Wuppertal, West Germany.
^‡On leave from Technische Hochschule Aachen, West Germany.

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Phys. Rev. D 27, 105 – Published 1 January, 1983

DOI: https://doi.org/10.1103/PhysRevD.27.105

Abstract

The origin of the observed scaling violations in inclusive $e^{+} e^{-}$ annihilation is investigated. Perturbative jet evolution is not necessarily the only reason for scale breaking in the hadron spectra at present energies. Remnants of finite-transverse-momentum and mass effects are still important in nonperturbative, cascade-type, jet formation in the ∼10 GeV range. Heavy-quark fragmentation has a strong impact on hadronic inclusive spectra. A simple parametrization for the heavy-quark fragmentation function is given which describes well recently measured charmed-meson spectra. Taking these effects into account, good agreement with the observed scaling violations is obtained in cascade-type jet models with hard-gluon bremsstrahlung.

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Physical Review D

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Scaling violations in inclusive $e^{+} e^{-}$ annihilation spectra

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Scaling violations in inclusive $e^{+} e^{-}$ annihilation spectra