Tests of hadronic interaction models with muon pseudorapidities measured with KASCADE-Grande

The Muon Tracking Detector in the KASCADE-Grande experiment allows the measurement of muon directions up to 700 m from the shower center. It means, that nearly all muons produced in a shower and surviving to the ground level are subject of investigati on. It is important not only for studying mean muon production heights but also for investigations of EAS muon pseudorapidity distributions. These distributions are nearly identical to the pseudorapidity d istributions of their parent mesons produced in hadronic interactions. Lateral distribution of muon pseudorapidity in extensive air showers (EAS) is a sensitive probe of hadronic interaction parameters embedded in the models. In this quantity lateral distribution of muon energy and lateral distribution of muon transverse momenta are hidden. Results of the analysis compared with the predictions of QGSJetII and FLUKA2002 models are discussed.