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Constraining the parameter space of branon dark matter using white dwarf stars

Grigorios Panotopoulos* and Ilídio Lopes†

  • CENTRA, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco País 1, Lisboa, Portugal

  • *grigorios.panotopoulos@tecnico.ulisboa.pt
  • †ilidio.lopes@tecnico.ulisboa.pt
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Phys. Rev. D 96, 063003 – Published 7 September, 2017

DOI: https://doi.org/10.1103/PhysRevD.96.063003

Abstract

In the present work we study the branon dark matter particles impact on compact objects, and we provide the first constraints of the parameter space using white dwarf stars. The branon dark matter model is characterized by two free parameters, namely the branon mass particle M and the brane tension factor f. The latter determines the strength of the interaction of branon dark matter particles with baryons. By considering a typical white dwarf star we were able to obtain constraints on branon dark matter competitive with current limits obtained by direct detection and collider searches. In particular, our results show that (i) for heavy branons with a mass M>10  GeV white dwarfs fail to provide us with bounds better than current limits from dark matter direct detection searches, and (ii) for light branons in the mass range 2  keV<M<1  GeV, which cannot be probed either with current dark matter experiments or with the next generation of detectors, the dark matter abundance constraint determines f as a function of M in the range 0.1<M<1  GeV for the branon mass and 1<f<5  GeV for the brane tension factor. Furthermore, our findings indicate that the limits from white dwarfs are not stronger than the dark matter abundance constraint.

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Phys. Rev. D 96, 063003– Published 7 September, 2017
  • Received 13 February 2017

© 2017 American Physical Society

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