skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: New constraints from PAMELA anti-proton data on annihilating and decaying dark matter

Abstract

Recently the PAMELA experiment has released its updated anti-proton flux and anti-proton to proton flux ratio data up to energies of ≈ 200GeV. With no clear excess of cosmic ray anti-protons at high energies, one can extend constraints on the production of anti-protons from dark matter. In this letter, we consider both the cases of dark matter annihilating and decaying into standard model particles that produce significant numbers of anti-protons. We provide two sets of constraints on the annihilation cross-sections/decay lifetimes. In the one set of constraints we ignore any source of anti-protons other than dark matter, which give the highest allowed cross-sections/inverse lifetimes. In the other set we include also anti-protons produced in collisions of cosmic rays with interstellar medium nuclei, getting tighter but more realistic constraints on the annihilation cross-sections/decay lifetimes.

Authors:
 [1]
  1. International School for Advanced Studies (SISSA), via Bonomea 265, 34136 Trieste (Italy)
Publication Date:
OSTI Identifier:
22277822
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2011; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; ANTIPROTONS; ASTROPHYSICS; COSMIC PROTONS; COSMIC RAY FLUX; COSMOLOGY; CROSS SECTIONS; LIFETIME; NONLUMINOUS MATTER; PARTICLE DECAY; PARTICLE PRODUCTION; STANDARD MODEL

Citation Formats

Cholis, Ilias. New constraints from PAMELA anti-proton data on annihilating and decaying dark matter. United States: N. p., 2011. Web. doi:10.1088/1475-7516/2011/09/007.
Cholis, Ilias. New constraints from PAMELA anti-proton data on annihilating and decaying dark matter. United States. https://doi.org/10.1088/1475-7516/2011/09/007
Cholis, Ilias. 2011. "New constraints from PAMELA anti-proton data on annihilating and decaying dark matter". United States. https://doi.org/10.1088/1475-7516/2011/09/007.
@article{osti_22277822,
title = {New constraints from PAMELA anti-proton data on annihilating and decaying dark matter},
author = {Cholis, Ilias},
abstractNote = {Recently the PAMELA experiment has released its updated anti-proton flux and anti-proton to proton flux ratio data up to energies of ≈ 200GeV. With no clear excess of cosmic ray anti-protons at high energies, one can extend constraints on the production of anti-protons from dark matter. In this letter, we consider both the cases of dark matter annihilating and decaying into standard model particles that produce significant numbers of anti-protons. We provide two sets of constraints on the annihilation cross-sections/decay lifetimes. In the one set of constraints we ignore any source of anti-protons other than dark matter, which give the highest allowed cross-sections/inverse lifetimes. In the other set we include also anti-protons produced in collisions of cosmic rays with interstellar medium nuclei, getting tighter but more realistic constraints on the annihilation cross-sections/decay lifetimes.},
doi = {10.1088/1475-7516/2011/09/007},
url = {https://www.osti.gov/biblio/22277822}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 09,
volume = 2011,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2011},
month = {Thu Sep 01 00:00:00 EDT 2011}
}