Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 103: Methods in Particle Physics V (Event Reconstruction, PID)

T 103.6: Talk

Friday, April 4, 2025, 10:15–10:30, VG 4.101

Development and testing of a neutron identification algorithm for Belle II — Slavomira Stefkova, Florian Bernlochner, and •Georgios Alexandris — Physikalisches Institut der Rheinischen Friedrich-Wilhelms-Universität Bonn

Among the various neutral Standard Model particles, neutrons and, to a lesser extent, antineutrons are considered invisible in the Belle II detector due to their weak interaction with the detector material. A better understanding of their interaction rates is therefore crucial for analyses in Belle II that involve significant missing energy. While neutrons can only interact with atomic nuclei in the electromagnetic calorimeter (ECL) and the K0L and muon detector (KLM) through inelastic and elastic scattering, antineutrons can also be identified by the products of their annihilation with matter. This project aims to investigate the interaction properties of these neutral hadrons and use their distinct characteristics to develop particle identification (PID) algorithms for identifying neutrons. Preliminary results from these studies will be presented.

Keywords: Particle Identification (PID); Belle II Detector; Interaction Rates; Neutron; Antineutron