Comparison of inclusive ${K}^{+}$ production in proton-proton and proton-neutron collisions

Comparison of inclusive $K^{+}$ production in proton-proton and proton-neutron collisions

Yu. Valdau, V. Koptev, S. Barsov, M. Büscher, A. Dzyuba, M. Hartmann, A. Kacharava, I. Keshelashvili, A. Khoukaz, S. Mikirtychiants, M. Nekipelov, A. Polyanskiy, F. Rathmann, H. Ströher, Yu. N. Uzikov, and C. Wilkin

Phys. Rev. C 84, 055207 – Published 28 November 2011

Abstract

The momentum spectra of $K^{+}$ produced at small angles in proton-proton and proton-deuteron collisions have been measured at four beam energies, 1.826, 1.920, 2.020, and 2.650 GeV, using the ANKE spectrometer at COSY-Jülich. After making corrections for Fermi motion and shadowing, the data indicate that $K^{+}$ production near threshold is stronger in $p p$ - than in $p n$ -induced reactions. However, most of this difference could be made up by the unobserved $K^{0}$ production in the $p n$ case.

Received 1 September 2011

DOI:https://doi.org/10.1103/PhysRevC.84.055207

Authors & Affiliations

Yu. Valdau^1,2,*, V. Koptev¹, S. Barsov¹, M. Büscher², A. Dzyuba¹, M. Hartmann², A. Kacharava², I. Keshelashvili³, A. Khoukaz⁴, S. Mikirtychiants^1,2, M. Nekipelov², A. Polyanskiy^2,5, F. Rathmann², H. Ströher², Yu. N. Uzikov⁶, and C. Wilkin^7,†

¹High Energy Physics Department, Petersburg Nuclear Physics Institute, RU-188350 Gatchina, Russia
²Institut für Kernphysik and Jülich Centre for Hadron Physics, Forschungszentrum Jülich, DE-52425 Jülich, Germany
³Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
⁴Institut für Kernphysik, Universität Münster, DE-48149 Münster, Germany
⁵Institute for Theoretical and Experimental Physics, RU-117218 Moscow, Russia
⁶Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
⁷Physics and Astronomy Department, University College London, UK WC1E 6BT London, England, United Kingdom

^*y.valdau@fz-juelich.de
^†cw@hep.ucl.ac.uk

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Vol. 84, Iss. 5 — November 2011

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Physical Review C

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