Cosmic ray antiprotons provide an important probe for the study of cosmic ray propagation in the interstellar space and to investigate the existence of Galactic dark matter. The ARGO-YBJ experiment is observing the Moon shadow with high statistical significance at an energy threshold of a few hundred GeV. Using all the data collected until November 2009, we set two upper limits on the (p) over bar /p, flux ratio: 5% at an energy of 1.4 TeV and 6% at 5 TeV with a confidence level of 90%. In the few-TeV range the ARGO-YBJ results are the lowest available, useful to constrain models for antiproton production in antimatter domains.

Measurement of the (p)over-bar/p ratio in the few-TeV energy range with ARGO--YBJ / Iuppa, R; ARGO-YBJ, Collaboration; Di Sciascio, G. - In: NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. - ISSN 0920-5632. - 212-213:(2011), pp. 301-306. [10.1016/j.nuclphysbps.2011.03.040]

Measurement of the (p)over-bar/p ratio in the few-TeV energy range with ARGO--YBJ

Iuppa, R;
2011

Abstract

Cosmic ray antiprotons provide an important probe for the study of cosmic ray propagation in the interstellar space and to investigate the existence of Galactic dark matter. The ARGO-YBJ experiment is observing the Moon shadow with high statistical significance at an energy threshold of a few hundred GeV. Using all the data collected until November 2009, we set two upper limits on the (p) over bar /p, flux ratio: 5% at an energy of 1.4 TeV and 6% at 5 TeV with a confidence level of 90%. In the few-TeV range the ARGO-YBJ results are the lowest available, useful to constrain models for antiproton production in antimatter domains.
Iuppa, R; ARGO-YBJ, Collaboration; Di Sciascio, G
Measurement of the (p)over-bar/p ratio in the few-TeV energy range with ARGO--YBJ / Iuppa, R; ARGO-YBJ, Collaboration; Di Sciascio, G. - In: NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. - ISSN 0920-5632. - 212-213:(2011), pp. 301-306. [10.1016/j.nuclphysbps.2011.03.040]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/162571
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