Annihilation vertex reconstruction algorithm with single-layer Timepix4 detectors

Autor(en)

V. Kraxberger, A. Gligorova, E. Widmann

Abstrakt

A study of antiproton–nucleus annihilations at rest on a variety of thin solid targets using slow extracted antiprotons is being prepared. To detect the charged annihilation products, the experiment will employ seven Timepix4 ASICs coupled to 500 µm thick silicon sensors. These will be arranged in a cuboid geometry that covers the majority of the full solid angle around the target, enabling precise tracking of outgoing particles using only one layer of detectors. With these novel chips, the annihilation will be studied by measuring the total multiplicity, energy, and angular distribution of various prongs produced in a number of targets. A 3D reconstruction algorithm for determining the annihilation vertex from particle tracks in the single-plane detectors has been developed using Monte Carlo simulations. This allows for event-by-event reconstruction, making it possible to distinguish antiproton annihilations on the target from those occurring elsewhere. The measurements will also enable a study of possible final state interactions triggered by the primary annihilation mesons, their evolution with the nuclear mass and their branching ratios.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Band

1082, Part 1

Anzahl der Seiten

5

ISSN

0168-9002

DOI

https://doi.org/10.48550/arXiv.2508.12005

Publikationsdatum

02-2026

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics, Instrumentation

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/02669883-ef88-4ecb-a115-5eeb3e6e0fde