Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 55: Hadron Structure and Spectroscopy IX

HK 55.6: Vortrag

Donnerstag, 17. März 2016, 18:00–18:15, S1/01 A5

Study of the Lambda-proton interaction with the femtoscopy technique in p+Nb reactions at 3.5 GeV with HADES — •Oliver Arnold for the HADES collaboration — Physik Department, Technische Universität München, Garching, Germany — Excellence Cluster "Universe", Garching, Germany

Two-particle correlation functions at low relative momenta are sensitive to the size of the emission zone. By knowing the particle interaction precisely it is possible to make a detailed study of the particle's source. But turning the picture around is also possible: By knowing the source size it is possible to study final state interactions of particle pairs where the interaction strength is not well established.

We use the technique of two-particle correlations in a femtoscopy measurement of proton-proton and proton-Lambda pairs, which were produced in p+Nb collisions and detected with the HADES setup, where the proton had a kinetic beam energy of 3.5 GeV. By using proton pairs we were able to extract the region of homogeneity of the p+Nb system. This information together with UrQMD transport simulations allowed us to concentrate solely on the investigation of the proton-Lambda interaction. We tested different sets of scattering parameters predicted by theoretical calculations on the experimental data and the sensitivity of the method. This work is supported by HIC for FAIR and HGS-HIRe.