Note on the dark matter explanation of the ARCADE excess and AMS data

TY - JOUR

T1 - Note on the dark matter explanation of the ARCADE excess and AMS data

AU - Fairbairn, Malcolm

AU - Grothaus, Philipp

PY - 2014/12/17

Y1 - 2014/12/17

N2 - In this paper, we show that positron data from AMS seem to rule out the explanation of the ARCADE isotropic radio background excess in terms of self-annihilating dark matter. In earlier works it was found that leptonic annihilation channels of light dark matter provide a good fit to the excess due to synchrotron emission of the final state particles. However, limits on the self-annihilation cross section derived from the positron data of AMS now severely constrain light self-annihilating dark matter and cross sections below that of a thermal relic are already tested for leptonic annihilation channels. Combining these two results, we conclude that an explanation of the excess in the radio background in terms of self-annihilating dark matter is excluded.

AB - In this paper, we show that positron data from AMS seem to rule out the explanation of the ARCADE isotropic radio background excess in terms of self-annihilating dark matter. In earlier works it was found that leptonic annihilation channels of light dark matter provide a good fit to the excess due to synchrotron emission of the final state particles. However, limits on the self-annihilation cross section derived from the positron data of AMS now severely constrain light self-annihilating dark matter and cross sections below that of a thermal relic are already tested for leptonic annihilation channels. Combining these two results, we conclude that an explanation of the excess in the radio background in terms of self-annihilating dark matter is excluded.

UR - https://www.scopus.com/pages/publications/84919776605

U2 - 10.1103/PhysRevD.90.127302

DO - 10.1103/PhysRevD.90.127302

M3 - Article

AN - SCOPUS:84919776605

SN - 1550-7998

VL - 90

JO - Physical Review D (Particles, Fields, Gravitation and Cosmology)

JF - Physical Review D (Particles, Fields, Gravitation and Cosmology)

IS - 12

M1 - 127302

ER -