Change search
ReferencesLink to record
Permanent link

Direct link
The search for antihelium in cosmic rays using data from the PAMELA experiment
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
Show others and affiliations
Number of Authors: 62
2011 (English)In: Bulletin of the Russian Academy of Sciences: Physics, ISSN 1062-8738, Vol. 75, no 3, 331-333 p.Article in journal (Refereed) Published
Abstract [en]

The generally accepted theory explaining the observed cosmological baryon asymmetry involves mechanisms of baryosynthesis that generate asymmetry in an initially baryon symmetric Universe. Due to the possible inhomogeneous spatial nature of such mechanisms, antimatter domains could arise in the Universe. This hypothesis can be tested by the direct measurement of fluxes of antinuclei in cosmic rays. Searching for antihelium nuclei is therefore among the objectives of the PAMELA experiment. We analyzed data from August 2006 to December 2009 and obtained a preliminary value for the upper limit of the antihelium/helium flux ratio that could lead to some restrictions on the existing theoretical models of the production and propagation of antimatter in the Galaxy.

Place, publisher, year, edition, pages
2011. Vol. 75, no 3, 331-333 p.
Keyword [en]
Baryon asymmetry, Direct measurement, Flux ratio, Theoretical models, Upper limits, Cosmic rays, Experiments, Hadrons, Cosmology
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-151235DOI: 10.3103/S1062873811030282ScopusID: 2-s2.0-79955859446OAI: diva2:747261

QC 20140916

Available from: 2014-09-16 Created: 2014-09-15 Last updated: 2014-09-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Carlson, PerGillard, William
By organisation
Particle and Astroparticle Physics
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 8 hits
ReferencesLink to record
Permanent link

Direct link