Verification of charge sign for high-energy particles measured by magnetic tracking system of PAMELA spectrometer

International Conference on Particle Physics and Astrophysics

物理学;天文学

Lukyanov, A.D.^1 ; Alekseev, V.V.^1 ; Bogomolov, Yu. V.^1 ; Dunaeva, O.A.^1 ; Malakhov, V.V.^2 ; Mayorov, A.G.^1,2 ; Rodenko, S.A.^2

Department of Physics, Yaroslavl State P.G. Demidov University, 150000 Sovietskaya st. 14, Yaroslavl, Russia^1

National Research Nuclear University MEPhI, 115449 Kashirskoe shosse 31, Moscow, Russia^2

关键词: Ada boost classifiers;    Charge sign;    Classification accuracy;    Dark matter particles;    High-energy particles;    Instrumental resolution;    Magnetic tracking systems;    Scientific community;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012026/pdf
DOI  :  10.1088/1742-6596/798/1/012026

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Analysis of experimental data of primary positrons and antiprotons fluxes obtained by PAMELA spectrometer, recently confirmed by AMS-02 spectrometer, for some reasons is of big interest for scientific community, especially for energies higher than 100 GV, where appearance of signal coming from dark matter particles is possible. In this work we present a method for verification of charge sign for high-energy antiprotons, measured by magnetic tracking system of PAMELA spectrometer, which can be immitated by protons due to scattering or finite instrumental resolution at high energies (so-called "spillover"). We base our approach on developing2 a set of distinctive features represented by differently computed rigidities and training AdaBoost classifier, which shows good classification accuracy on Monte-Carlo simulation data of 98% for rigidity up to 600 GV.