Medium effects in proton-induced $K^{0}$ production at 3.5 GeV

Abstract

We present the analysis of the inclusive K 0 production in p+p and p+Nb collisions measured with the HADES detector at a beam kinetic energy of 3.5 GeV. Data are compared to the GiBUU transport model. The data suggest the presence of a repulsive momentum-dependent kaon potential as predicted by the Chiral Perturbation Theory (ChPT). For the kaon at rest and at normal nuclear density, the ChPT potential amounts to ≈ 35 MeV. A detailed tuning of the kaon production cross sections implemented in the model has been carried out to reproduce the experimental data measured in p+p collisions. The uncertainties in the parameters of the model were examined with respect to the sensitivity of the experimental results from p+Nb collisions to the in-medium kaon potential.

A study of the $KN$-$K^*N$ coupled systems

“…We present the total cross sections and scattering lengths for the KN and K * N channels. Indeed, the results presented here are of special interest for K and K * production in p + p and p + A collisions, as reported by HADES [1][2][3], STAR [4] and NA49 [5] Collaborations.…”

“…The need for a reliable information on the in-medium kaon potential has also been discussed in Ref. [3] where the K 0 production in p+Nb reactions at a beam kinetic energy of 3.5 GeV is analyzed by HADES. Further, by analyzing the freeze-out temperature using a statistical hadronization model, the experimental results for K * 0 production seem to indicate the necessity of considering the rescattering of the decay products of K * 0 in the hadronic matter [1].…”

Medium effects in λK + pair production by 2.83 GeV protons on nuclei

“…3) The relations (11) are in line with the results for the total cross sections for K 0 production channels pp → Λpπ + π 0 K 0 and pp → Λnπ + π + K 0 at beam kinetic energy of 3.5 GeV, which can be obtained assuming that these channels go exclusively through the reactions pp → ∆ ++ Σ(1385) 0 K 0 and pp → ∆ + Σ(1385) + K 0 and using formula (2) for the total cross sections of the latter reactions from Ref. [36], in which inclusive K 0 production in pp and pNb interactions was measured with the HADES detector. This gives us confidence that the use of these relations is justified at our beam energy of interest.…”

“…( 75), are defined by Eqs. ( 28), (36) and (37), in which one has to make the following substitutions: 75) is defined above by Eq. ( 27), in which one has to replace σ tot ΛN by inelastic cross section σ in Σ 0 N of the Σ 0 N interaction 13) .…”

“…(75), are defined by Eqs. (28), (36) and (37), in which one has to make the following substitutions:…”