Velocity Dependence from Resonant Self-Interacting Dark Matter

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Velocity Dependence from Resonant Self-Interacting Dark Matter

Xiaoyong Chu, Camilo Garcia-Cely, and Hitoshi Murayama

Phys. Rev. Lett. 122, 071103 – Published 22 February 2019

Abstract

The dark matter density distribution in small-scale astrophysical objects may indicate that dark matter is self-interacting, while observations from clusters of galaxies suggest that the corresponding cross section depends on the velocity. Using a model-independent approach, we show that resonant self-interacting dark matter can naturally explain such a behavior. In contrast to what is often assumed, this does not require a light mediator. We present explicit realizations of this mechanism and discuss the corresponding astrophysical constraints.

Received 23 October 2018
Revised 24 November 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.071103

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Large scale structure of the Universe Particle astrophysics Particle dark matter

Gravitation, Cosmology & AstrophysicsParticles & Fields

Authors & Affiliations

Xiaoyong Chu^1,*, Camilo Garcia-Cely^2,†, and Hitoshi Murayama^3,4,5,2,‡

¹Institute of High Energy Physics, Austrian Academy of Sciences, Nikolsdorfer Gasse 18, 1050 Vienna, Austria
²Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
³Department of Physics, University of California, Berkeley, California 94720, USA
⁴Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa 277-8583, Japan
⁵Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

^*xiaoyong.chu@oeaw.ac.at
^†camilo.garcia.cely@desy.de
^‡hitoshi@berkeley.edu, hitoshi.murayama@ipmu.jp

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Issue

Vol. 122, Iss. 7 — 22 February 2019

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