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Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target

Abstract : Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented in three-dimensional bins of the Bjorken scaling variable x, the relative virtual-photon energy y, and the fraction z of the virtual-photon energy carried by the produced hadron. The data were obtained by the COMPASS Collaboration by scattering 160 GeV muons off an isoscalar LiD target. They cover the kinematic domain 1 (GeV/c)$^2$ < Q$^2$ < 60 (GeV/c)$^2$ in the photon virtuality, 0.004 < x < 0.4, 0.1 < y < 0.7, 0.20 < z < 0.85, and W > 5 GeV/c$^2$ in the invariant mass of the hadronic system. The results from the sum of the z-integrated K+ and K- multiplicities at high x point to a value of the non-strange quark fragmentation function larger than obtained by the earlier DSS fit.
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Submitted on : Friday, June 9, 2017 - 1:44:10 PM
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C. Adolph, V. Andrieux, Y. Bedfer, L. Capozza, Q. Curiel, et al.. Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target. Physics Letters B, Elsevier, 2017, 767, pp.133-141. ⟨10.1016/j.physletb.2017.01.053⟩. ⟨cea-01535725⟩

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