Measurement of electron-positron spectrum in high-energy cosmic rays in the PAMELA experiment

A V Karelin ,M Martucci,R Sarkar ,S Koldobskiy ,A N Kvashnin ,A Bruno ,G Osteria ,A Leonov ,V Bonvicini ,E Vannuccini ,R Bellotti ,M Simon ,S Bottai ,M Casolino ,G Castellini ,F Palma ,M Bongi ,É A Bogomolov ,R Carbone ,G Vasilyev ,V Di Felice ,A G Mayorov ,O Adriani ,P Picozza ,L Rossetto ,P Papini ,N Mori ,N De Simone ,V V Mikhailov ,G Zampa ,S Y Krutkov ,L Marcelli ,M Ricci ,S A Voronov ,C De Santis ,F Cafagna ,G C Barbarino ,A Vacchi ,S V Koldashov ,D Campana ,Y T Yurkin ,М Мерге ,П Спиллантини ,A M Galper ,M Boezio ,G A Bazilevskaya ,C De Donato ,E Mocchiutti ,Mark Pearce ,A Monaco ,W Menn ,V Malakhov ,P Carlson ,R Sparvoli ,S Ricciarini ,R Munini,B Panico,V Formato,V Scotti,N Zampa

doi:10.1088/1742-6596/632/1/012014

Abstract

At present the existing data on the cosmic ray electron energy spectra in the high energy range are fragmented, and the situation is exacerbated by their small number. In the satellite PAMELA experiment measurements at high energies are carried out by the calorimeter. The experimental data accumulated for more than 8 years of measurements, with the information of the calorimeter, the neutron detector and the scintillation counters made it possible to obtain the total spectrum of high-energy electrons and positrons in energy range 0.3-3 TeV.

Highlights

Study of the cosmic ray energy spectrum, obtained in direct measurements on board satellites, is one of the priority tasks in modern astrophysics
The results obtained in the FERMI [6] and AMS-02 [7] satellite experiments, do not indicate a significant spectrum break at these energies
In order to restore the primary spectrum of electrons and positrons, it was necessary to estimate the fraction of background protons in each energy interval, which the range of measurement was divided into. This was done on the basis of cosmic-ray proton spectrum [10] experimentally measured with the PAMELA calorimeter and data on the proton fraction remaining after the selection, obtained in the simulation

Summary

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Measurement of electron-positron spectrum in high-energy cosmic rays in the PAMELA experiment. This content has been downloaded from IOPscience. Ser. 632 012014 (http://iopscience.iop.org/1742-6596/632/1/012014) View the table of contents for this issue, or go to the journal homepage for more. A V Karelin, O Adriani, G C Barbarino, G A Bazilevskaya, R Bellotti, M Boezio, E A Bogomolov, M Bongi, V Bonvicini, S Bottai, A Bruno, F Cafagna, D Campana, R Carbone, P Carlson, M Casolino, G Castellini, C De Donato, C De Santis, N De Simone, V Di Felice, V. L Rossetto, M Simon, R Sparvoli, P Spillantini, A Vacchi, E Vannuccini, G I Vasilyev, S A Voronov, Y T Yurkin, G Zampa, N Zampa

Introduction

Findings

Conclusion