Reconstructing Hyperons with the ANDA Detector at FAIR

FAIRNESS 2016

Ikegami Andersson, W.^1

Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala

S-751 20, Sweden^1

关键词: Decay products;    Hyperon production;    Longitudinal components;    PANDA detectors;    Path finding;    Pattern recognition algorithms;    Proton collisions;    Spin observables;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/742/1/012009/pdf
DOI  :  10.1088/1742-6596/742/1/012009

来源: IOP

【 摘 要 】

Hyperon production and the study of their properties is an important part of the physics programme of the future PANDA experiment at FAIR. Antihyperon-hyperon pairs will be produced in antiproton-proton collisions through the annihilation of at least one light antiquark-quark (u; d) pair and the creation of a corresponding number of antiquark-quark ss pairs. By measuring the decay products of the hyperons, spin observables such as the polarisation can be measured. Many hyperons have a long life-time which gives rise to final state particles originating from displaced vertices. A pattern recognition algorithm using information from the PANDA Straw Tube Tracker is extended to reconstruct not only the transversal, but also the longitudinal components of charged tracks. A Hough transform and a path finding method as tools to extract the longitudinal components are being developed.