SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Hadron Structure and Spectroscopy II
HK 18.7: Vortrag
Dienstag, 21. März 2023, 18:45–19:00, SCH/A316
Measuring Generalized Distribution Amplitudes in Proton-Antiproton Annihilation with PANDA at FAIR — •Faiza Khalid, Stefan Diehl, and Kai-Thomas Brinkmann — II. Physikalisches Institut, Justus Liebig Universität Gießen
The future PANDA experiment at FAIR with the HESR antiproton beam provides unique possibilities to study the 3D nucleon structure with exclusive channels in pp annihilation. One of the channels of interest for the measurement of Generalized Distribution Amplitudes (GDAs) is pp→ π0γ. Simulations at several center-of-mass energies were done for this signal channel (pp→ π0γ) and for the main background channel(pp→ π0π0) to check the feasibility of the measurement. The talk will present the feasibility study for the measurement of the cos(θ) dependence of the differential cross-section for pp→ π0γ at different integrated luminosities. The cross sections have been estimated based on data from the E760 experiment at Fermilab, which is available in a limited kinematic range. Various optimal set of cuts were investigated to reduce the high background in this channel. Results of count rate estimates and estimates of the expected statistical
uncertainty are presented. Different event selection cuts have been investigated to optimize the signal to background ratio while keeping a reasonable reconstruction efficiency. Also presented is the feasibility study of the channel pp→ π0π0 whose cross-section needs to be measured to subtract the high background in the channel pp→ π0γ.
The work is supported by BMBF and HFHF