Comparison of inclusive K+ production in proton-proton and proton-neutron collisions
nucl-ex
/ Authors
Yu. Valdau, V. Koptev, S. Barsov, M. Buescher, A. Dzyuba, M. Hartmann, A. Kacharava, I. Keshelashvili, A. Khoukaz, S. Mikirtychiants
and 6 more authors
M. Nekipelov, A. Polyanskiy, F. Rathmann, H. Stroeher, Yu. N. Uzikov, C. Wilkin
/ 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-Juelich. After making corrections for Fermi motion and shadowing, the data indicate that K+ production near threshold is stronger in pp- than in pn-induced reactions. However, most of this difference could be made up by the unobserved K0 production in the pn case.