Kaon and Phi Production in Pion-Nucleus Reactions at 1.7 GeV/c*
Technische Universität München, Fakultät für Physik, E62a,
2 Excellence Cluster Universe, Technische Universität München
** e-mail: firstname.lastname@example.org
Published online: 2 February 2018
The production and properties of K+, K− and ϕ in nuclear reactions π− + A (A = C,W) at a beam momentum of 1:7 GeV/c has been studied with the HADES setup at SIS18/GSI. Of particular interest is the K− absorption in nuclear matter which should be driven by strangeness exchange processes on one (K−N → Yπ) or more nucleons (K−NN → YNπ). In this context, also the ϕ has to be taken into account, since ϕ decays into K+K− pairs may substantially affect the measured K− abundance. A solid reference is needed to evaluate the K− absorption with in the nucleus and in this work we discuss the determination of this reference. A double ratio of K−=K+(W)=K−=K+(C) is measured within the acceptance and compared to the reference.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).