Constraints on light magnetic dipole dark matter from the ILC and SN 1987A

Kenji Kadota , Joseph Silk (1)

1 IAP - Institut d'Astrophysique de Paris

To illustrate the complementarity of the linear collider and astrophysics bounds on the light (MeV-scale mass) dark matter (DM), we study the constraints on the magnetic dipole DM from the DM-electron interactions at the proposed International Linear Collider (ILC) and in supernova (SN) 1987A. We in particular focus on the e⁺e^- annihilation, which is the common process for producing DM pairs both at the ILC and in the SN. We estimate the bounds on the DM magnetic dipole moment from the monophoton signals at the ILC and also from the energy loss rate due to the freely streaming DM produced in the SN. The SN bounds can be more stringent than those from the ILC by as much as a factor O(1⁰⁵) for a DM mass below 10² MeV. For larger DM masses, on the other hand, SN rapidly loses its sensitivity and the collider constraints can complement the SN constraints.

Mots clés: 95.35.+d; Dark matter; High Energy Physics - Phenomenology; Astrophysics - Cosmology and Nongalactic Astrophysics; Astrophysics - High Energy Astrophysical Phenomena

Domaines: Planète et Univers [physics]

Kenji Kadota, Joseph Silk. Constraints on light magnetic dipole dark matter from the ILC and SN 1987A. Physical Review D, 2014, 89, ⟨10.1103/PhysRevD.89.103528⟩. ⟨insu-03645649⟩