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Is the dark matter particle its own antiparticle?

Queiroz, F., Rodejohann, W., & Yaguna, C. E. (2016). Is the dark matter particle its own antiparticle? Retrieved from http://arxiv.org/abs/1610.06581.

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### Creators

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Creators:
Queiroz, Farinaldo1, Author
Rodejohann, Werner2, Author
Yaguna, Carlos E.2, Author
Affiliations:
1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549
2Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society, ou_907556

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Free keywords: High Energy Physics - Phenomenology, hep-ph, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,High Energy Physics - Experiment, hep-ex
Abstract: We propose a test based on direct detection data that allows to determine if the dark matter particle is different from its antiparticle. The test requires the precise measurement of the dark matter spin-independent direct detection cross sections off $\mathrm{three}$ different nuclei, and consists of interpreting such signals in terms of self-conjugate (particle $=$ antiparticle) dark matter to see if such interpretation is consistent. If it is not, the dark matter must be different from its antiparticle. We illustrate this procedure for two sets of target nuclei, $\mathrm{\{Xe, Ar, Si\}}$ and $\mathrm{\{Xe, Ar, Ge\}}$, identifying the regions of the parameter space where it is particularly feasible. Our results indicate that future signals in direct detection experiments, if sufficiently accurate, might be used to establish that the dark matter particle is not its own antiparticle --a major step towards the determination of the fundamental nature of the dark matter.

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Dates: 2016-10-202016
Publication Status: Published online
Pages: 6 pages, 4 figures
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Rev. Type: -
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