https://hal-insu.archives-ouvertes.fr/insu-03645649Kadota, KenjiKenjiKadotaSilk, JosephJosephSilkIAP - Institut d'Astrophysique de Paris - INSU - CNRS - Institut national des sciences de l'Univers - SU - Sorbonne Université - CNRS - Centre National de la Recherche ScientifiqueConstraints on light magnetic dipole dark matter from the ILC and SN 1987AHAL CCSD201495.35.+dDark matterHigh Energy Physics - PhenomenologyAstrophysics - Cosmology and Nongalactic AstrophysicsAstrophysics - High Energy Astrophysical Phenomena[SDU] Sciences of the Universe [physics]Gestionnaire, Hal Sorbonne Université2022-04-28 16:19:302022-04-28 16:19:502022-04-28 16:19:31enJournal articleshttps://hal-insu.archives-ouvertes.fr/insu-03645649/document10.1103/PhysRevD.89.103528application/pdf1To 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<SUP>+</SUP>e<SUP>-</SUP> 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(1<SUP>05</SUP>) for a DM mass below 10<SUP>2</SUP> MeV. For larger DM masses, on the other hand, SN rapidly loses its sensitivity and the collider constraints can complement the SN constraints.