Precision Measurement of Charged Pion and Kaon Differential Cross Sections in e+e Annihilation at s=10.52GeV

M. Leitgab et al. (Belle Collaboration)
Phys. Rev. Lett. 111, 062002 – Published 6 August 2013
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Abstract

Measurements of inclusive differential cross sections for charged pion and kaon production in e+e annihilation have been carried out at a center-of-mass energy of s=10.52GeV. The measurements were performed with the Belle detector at the KEKB e+e collider using a data sample containing 113×106 e+eqq¯ events, where q={u,d,s,c}. We present charge-integrated differential cross sections dσh±/dz for h±={π±,K±} as a function of the relative hadron energy z=2Eh/s from 0.2 to 0.98. The combined statistical and systematic uncertainties for π± (K±) are 4% (4%) at z0.6 and 15% (24%) at z0.9. The cross sections are the first measurements of the z dependence of pion and kaon production for z>0.7 as well as the first precision cross section measurements at a center-of-mass energy far below the Z0 resonance used by the experiments at LEP and SLC.

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  • Received 25 January 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.062002

© 2013 American Physical Society

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Vol. 111, Iss. 6 — 9 August 2013

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