Antiprotons of galactic cosmic radiation in the PAMELA experiment

• A method for antiproton selection against a background of electrons, based on a mathematical model of data classification using variations in interparticle interaction in a calorimeter, and a method for excluding events accompanied by scattering in the inner detectors of a tracking system (which result in errors in the measured trajectory's curvature and charge sign) from analysis are discussed in this paper. Antiproton spectra and antiproton/proton flux ratio at energies of 0.06 to 350 GeV with statistics of events surpassing those in [1] are obtained. The results can be used to create models for the generation and distribution of particles in the Galaxy, and for searching and studying the nature of hypothetical dark matter particles.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

Charge sign

Dark matter particles

Data classification

Distribution of particles

Galactic cosmic radiations

Inner Detector

Inter-particle interaction

Tracking system

Association reactions

Galaxies

Mathematical models

Protons

Publication and Content Type

ref (subject category)

art (subject category)