Binary Collisions of Dark Matter Blobs

We describe the model-independent mechanism by which dark matter and dark matter structures heavier than \(\sim 8\times 10^{11}\) GeV form binary pairs in the early Universe that spin down and merge both in the present and throughout the Universe's history, producing potentially observable sign...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2022-06
Main Authors: Diamond, Melissa D, Kaplan, David E, Rajendran, Surjeet
Format: Article
Language:English
Subjects:
Collisions
Dark matter
Gamma rays
Gravitational waves
Object recognition
Size effects
Thermal baths
Universe
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We describe the model-independent mechanism by which dark matter and dark matter structures heavier than \(\sim 8\times 10^{11}\) GeV form binary pairs in the early Universe that spin down and merge both in the present and throughout the Universe's history, producing potentially observable signals. Sufficiently dense dark objects will dominantly collide through binary mergers instead of random collisions. We detail how one would estimate the merger rate accounting for finite size effects, multibody interactions, and friction with the thermal bath. We predict how mergers of dark dense objects could be detected through gravitational and electromagnetic signals, noting that such mergers could be a unique source of high frequency gravitational waves. We rule out objects whose presence would contradict observations of the CMB and diffuse gamma-rays.
ISSN:2331-8422