Neutral-Kaon Production in e^+e^-, ep, and p\bar p Collisions at Next-to-Leading Order

Abstract

We present new sets of fragmentation functions for neutral kaons, both at leading and next-to-leading order. They are fitted to data on inclusive K^0 production in e^+e^- annihilation taken by MARK II at PEP (\sqrt s = 29 GeV) and by ALEPH at LEP. Our fragmentation functions lead to a good description of other e^+e^- data on inclusive K^0 production at various energies. They also nicely agree with the K_S^0 transverse-momentum spectra measured by H1 at the DESY ep collider HERA, by UA5 at the CERN Sp\bar pS Collider, and by CDF at the Fermilab Tevatron.

15 pages, latex, 7 figures (uuencoded compressed tar postscript)

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• Parton Fragmentation Functions
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• Single spin asymmetries in transversely polarized proton(antiproton) - proton inclusive processes
• Theory of hard photoproduction
• Phenomenology of single spin asymmetries in p(transv. polarized)-p -> pion + X
• Inclusive B-Meson Production in e^+ e^- and p p-bar Collisions
• The hadronization of partons
• Fragmentation Functions for K0short and Lambda with Complete Quark Flavour Separation
• Interplay of soft and hard processes and hadron $p_T$ spectra in $pA$ and $AA$ collisions
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• Rapidity Asymmetry in High-energy $d+A$ Collisions
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• First simultaneous global QCD analysis of dihadron fragmentation functions and transversity parton distribution functions
• Evolution of ep Fragmentation and Multiplicity Distributions in the Breit Frame
• Confronting fragmentation function universality with single hadron inclusive production at HERA and $e^{+}{e}^{-}$ colliders
• First NNLO fragmentation functions of $K_S^0$ and $\Lambda /\bar{\Lambda }$ and their uncertainties in the presence of hadron mass corrections
• Measurement of $K_S^0$ and ${\Lambda }^0$ production in $t\bar{t}$ dileptonic events in $pp$ collisions at $\sqrt{s}=$ 7 TeV with the ATLAS detector
• Global analysis of fragmentation functions to light neutral hadrons
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• Fragmentation functions of mesons in the Field-Feynman model