München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.11: Poster

Thursday, March 21, 2019, 16:30–19:00, Foyer Theresanium

Study of the effect of strong resonance decays on the emitting source in baryon-baryon femtoscopy with EPOS — •Gerhard Huber for the ALICE collaboration — TUM Munich

The femtoscopy technique has been used, in heavy-ions and pp collisions, to investigate both the emission source and the interaction potential between particle pairs by measuring their correlation function. For such studies, the emitting source has been generally assumed to have a Gaussian profile With the achievement of high precision femtoscopic data in pp collisions RUN 2 with ALICE and the improved knowledge of the underlying interaction it is possible to study the effect of strong resonances and collective effects on the profile source. Transport models as EPOS are tuned to describe the full dynamics of pp collisions at ALICE energies and are able to provide the space-time emitting source of the produced particles including resonances decay and rescattering which lead to non-gaussian contributions. This source can hence be used in femtoscopic analysis tools, as CATS, to evaluate the theoretical correlation function and compare it to experimental data.

In this poster we will present a detailed analysis on the effects of strong resonance decays on the emitting source, obtained with EPOS model simulations for pp collisions in ALICE. We will show the comparison of the resulting correlation function for different particle pairs, proton-proton and proton-Λ, with recent ALICE data in pp collisions at √s=13 TeV.