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Open AccessJournal ArticleDOI

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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Proceedings ArticleDOI

The millisecond pulsar contribution to the rising positron fraction

TL;DR: In this article, the contribution of millisecond pulsars to the terrestrial cosmic-ray electron/positron flux was modeled by using a population synthesis code to predict the source properties of present-day MSPs.
Posted Content

The millisecond pulsar contribution to the rising positron fraction

TL;DR: In this article, the contribution of millisecond pulsars to the terrestrial cosmic-ray electron/positron flux was modeled by using a population synthesis code to predict the source properties of present-day MSPs.

Mitigating Backgrounds with a Novel Thin-Film Cathode in the DRIFT-IId Dark Matter Detector

TL;DR: The DRIFT-IId detector has been used to detect alpha decays on the central cathode in which the alpha particle is completely or partially absorbed by the cathode material as mentioned in this paper.
Journal ArticleDOI

Recent results of the AMS-02 experiment on the ISS

Jorge Casaus
TL;DR: In this paper, the positron fraction in the energy range from 0.5 to 350 GeV and the search for positron anisotropy were summarized, which is not consistent with only the secondary production of positrons.
Dissertation

Phenomenology of particle dark matter

TL;DR: In this article, the authors explore new ways to probe properties of particle dark matter across different phenomenological settings, including the use of effective field theories (EFTs) for DM at the Large Hadron Collider (LHC).
References
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Journal ArticleDOI

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S. Agostinelli, +126 more
TL;DR: The Gelfant 4 toolkit as discussed by the authors is a toolkit for simulating the passage of particles through matter, including a complete range of functionality including tracking, geometry, physics models and hits.
Journal ArticleDOI

Machine learning

TL;DR: Machine learning addresses many of the same research questions as the fields of statistics, data mining, and psychology, but with differences of emphasis.
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