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Cosmic-Ray Positron Energy Spectrum Measured by PAMELA

TLDR
The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray positron flux and fraction that extends previously published measurements up to 300 GeV in kinetic energy.
Abstract
Precision measurements of the positron component in the cosmic radiation provide important information about the propagation of cosmic rays and the nature of particle sources in our Galaxy. The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray positron flux and fraction that extends previously published measurements up to 300 GeV in kinetic energy. The combined measurements of the cosmic-ray positron energy spectrum and fraction provide a unique tool to constrain interpretation models. During the recent solar minimum activity period from July 2006 to December 2009, approximately 24 500 positrons were observed. The results cannot be easily reconciled with purely secondary production, and additional sources of either astrophysical or exotic origin may be required.

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AMS02 positron excess from decaying fermion DM with local dark gauge symmetry

P. Ko, +1 more
- 04 Feb 2015 - 
TL;DR: In this paper, the authors considered a scenario with thermal fermionic DM with mass O(1 2 ) TeV decaying into a dark Higgs ( ) and an active neutrino ( a) instead of the SM Higgs boson and a.
Dissertation

Search for new physics in events with same sign leptons and missing energy with ATLAS at LHC

TL;DR: In this paper, the same-sign leptons and missing transverse energy were used to measure the top quark Yukawa coupling with a precision of 60% on the signal strength.
Journal ArticleDOI

Probes for Dark Matter Physics

TL;DR: The existence of cosmological dark matter is in the bedrock of the modern cosmology as discussed by the authors, and dark matter can be assumed to be nonbaryonic and consists of new stable particles.
Journal ArticleDOI

The gluon condensation in high energy cosmic rays

TL;DR: In this article, the gluon condensation (GC)-effects in high energy cosmic rays are investigated and it is shown that the GC may break the power-law of the cosmic ray spectra if the energy of accelerated protons exceeds the GC-threshold.
Journal ArticleDOI

Cosmic ray excesses from multi-component dark matter decays

TL;DR: In this article, the authors use multi-component decaying dark matter (DM) scenario to explain the possible cosmic ray excesses in the positron fraction recently confirmed by AMS-02 and the total e+ + e- flux observed by Fermi-LAT.
References
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