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Title: Probing MeV Dark Matter at Low-Energy e{sup +}e{sup -} Colliders

Abstract

It has been suggested that the pair annihilation of dark matter particles {chi} with mass between 0.5 and 20 MeV into e{sup +}e{sup -} pairs could be responsible for the excess flux (detected by the INTEGRAL satellite) of 511 keV photons coming from the central region of our Galaxy. The simplest way to achieve the required cross section while respecting existing constraints is to introduce a new vector boson U with mass M{sub U} below a few hundred MeV. We point out that over most of the allowed parameter space, the process e{sup +}e{sup -}{yields}U{gamma}, followed by the decay of U into either an e{sup +}e{sup -} pair or an invisible ({nu}{nu} or {chi}{chi}) channel, should lead to signals detectable by current B-factory experiments. A smaller, but still substantial, region of parameter space can also be probed at the {phi} factory DA{phi}NE.

Authors:
;  [1];  [2]
  1. Physikalisches Institut der Universitaet Bonn, Nussallee 12, 53115 Bonn (Germany)
  2. Department of Physics and Astronomy, University of Delhi, Delhi 110007 (India)
Publication Date:
OSTI Identifier:
20777140
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 14; Other Information: DOI: 10.1103/PhysRevLett.96.141802; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; CROSS SECTIONS; ELECTROMAGNETIC INTERACTIONS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; GALAXIES; INCLUSIVE INTERACTIONS; INTERMEDIATE BOSONS; KEV RANGE 100-1000; MASS; MEV RANGE 01-10; MEV RANGE 10-100; NONLUMINOUS MATTER; PAIR PRODUCTION; PARTICLE DECAY; PHOTONS; POSITRONS; SATELLITES; VECTOR MESONS

Citation Formats

Borodatchenkova, Natalia, Drees, Manuel, and Choudhury, Debajyoti. Probing MeV Dark Matter at Low-Energy e{sup +}e{sup -} Colliders. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.141802.
Borodatchenkova, Natalia, Drees, Manuel, & Choudhury, Debajyoti. Probing MeV Dark Matter at Low-Energy e{sup +}e{sup -} Colliders. United States. doi:10.1103/PhysRevLett.96.141802.
Borodatchenkova, Natalia, Drees, Manuel, and Choudhury, Debajyoti. Fri . "Probing MeV Dark Matter at Low-Energy e{sup +}e{sup -} Colliders". United States. doi:10.1103/PhysRevLett.96.141802.
@article{osti_20777140,
title = {Probing MeV Dark Matter at Low-Energy e{sup +}e{sup -} Colliders},
author = {Borodatchenkova, Natalia and Drees, Manuel and Choudhury, Debajyoti},
abstractNote = {It has been suggested that the pair annihilation of dark matter particles {chi} with mass between 0.5 and 20 MeV into e{sup +}e{sup -} pairs could be responsible for the excess flux (detected by the INTEGRAL satellite) of 511 keV photons coming from the central region of our Galaxy. The simplest way to achieve the required cross section while respecting existing constraints is to introduce a new vector boson U with mass M{sub U} below a few hundred MeV. We point out that over most of the allowed parameter space, the process e{sup +}e{sup -}{yields}U{gamma}, followed by the decay of U into either an e{sup +}e{sup -} pair or an invisible ({nu}{nu} or {chi}{chi}) channel, should lead to signals detectable by current B-factory experiments. A smaller, but still substantial, region of parameter space can also be probed at the {phi} factory DA{phi}NE.},
doi = {10.1103/PhysRevLett.96.141802},
journal = {Physical Review Letters},
number = 14,
volume = 96,
place = {United States},
year = {Fri Apr 14 00:00:00 EDT 2006},
month = {Fri Apr 14 00:00:00 EDT 2006}
}