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Title: Enhanced gamma ray signals in cosmic proton-wimp collisions due to hadronization

Abstract

In this paper, we investigate the gamma ray signal produced from dark matter collisions with high energy cosmic protons. Notably, we extend past results by including important hadronization effects. Showering and hadronization produces a high multiplicity of photons from the decays of hadrons, whose rate is not suppressed by the fine structure constant. Notably, proton remnants that do not participate in hard scattering, can produce a large rate of photons in the forward direction. These effects significantly enhance the photon rate and alter the energy and angular distributions compared to previous results which used only parton level calculations. Due to this modification, the gamma ray signal from the nearby active galactic nuclei Centaurus A is potentially testable in future Fermi-LAT and HESS measurements, for a dark matter mass and coupling consistent with current XENON100 bounds.

Authors:
;  [1];  [2]
  1. Institute of Theoretical Science, University of Oregon, 1371 E 13th Avenue, Eugene, OR 97403-5203 (United States)
  2. Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)
Publication Date:
OSTI Identifier:
22279882
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 11; 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; ANGULAR DISTRIBUTION; ASTROPHYSICS; COMPARATIVE EVALUATIONS; COSMIC PHOTONS; COSMIC PROTONS; COSMOLOGY; COUPLING; FINE STRUCTURE; GALAXY NUCLEI; GAMMA RADIATION; MULTIPLICITY; NONLUMINOUS MATTER; PARTICLE DECAY; POTENTIALS; REST MASS

Citation Formats

Chang, Spencer, Gao, Yu, and Spannowsky, Michael, E-mail: spchang123@gmail.com, E-mail: ygao3@uoregon.edu, E-mail: michael.spannowsky@googlemail.com. Enhanced gamma ray signals in cosmic proton-wimp collisions due to hadronization. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/11/053.
Chang, Spencer, Gao, Yu, & Spannowsky, Michael, E-mail: spchang123@gmail.com, E-mail: ygao3@uoregon.edu, E-mail: michael.spannowsky@googlemail.com. Enhanced gamma ray signals in cosmic proton-wimp collisions due to hadronization. United States. doi:10.1088/1475-7516/2012/11/053.
Chang, Spencer, Gao, Yu, and Spannowsky, Michael, E-mail: spchang123@gmail.com, E-mail: ygao3@uoregon.edu, E-mail: michael.spannowsky@googlemail.com. Thu . "Enhanced gamma ray signals in cosmic proton-wimp collisions due to hadronization". United States. doi:10.1088/1475-7516/2012/11/053.
@article{osti_22279882,
title = {Enhanced gamma ray signals in cosmic proton-wimp collisions due to hadronization},
author = {Chang, Spencer and Gao, Yu and Spannowsky, Michael, E-mail: spchang123@gmail.com, E-mail: ygao3@uoregon.edu, E-mail: michael.spannowsky@googlemail.com},
abstractNote = {In this paper, we investigate the gamma ray signal produced from dark matter collisions with high energy cosmic protons. Notably, we extend past results by including important hadronization effects. Showering and hadronization produces a high multiplicity of photons from the decays of hadrons, whose rate is not suppressed by the fine structure constant. Notably, proton remnants that do not participate in hard scattering, can produce a large rate of photons in the forward direction. These effects significantly enhance the photon rate and alter the energy and angular distributions compared to previous results which used only parton level calculations. Due to this modification, the gamma ray signal from the nearby active galactic nuclei Centaurus A is potentially testable in future Fermi-LAT and HESS measurements, for a dark matter mass and coupling consistent with current XENON100 bounds.},
doi = {10.1088/1475-7516/2012/11/053},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2012,
place = {United States},
year = {2012},
month = {11}
}