Pseudo-Dirac Dark Matter Leaves a Trace
Name
De Simone-2010-Pseudo-Dirac Dark Ma.pdf
Size
167.03 KB
Format
Adobe PDF
Checksum (MD5)
f1e3c0c858a5124fbaac17ed2e8c53e1
Author(s)
De Simone, Andrea
Sanz, Veronica
Sato, Hiromitsu Phil
Date Issued
September 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
De Simone, Andrea, Veronica Sanz, and Hiromitsu Phil Sato. “Pseudo-Dirac Dark Matter Leaves a Trace.” Physical Review Letters 105.12 (2010): 121802. © 2010 The American Physical Society.
Version
Final published version
Abstract
Pseudo-Dirac dark matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term. The decay of the heavier to the lighter state naturally occurs over a detectable length scale. Thus, whenever pseudo-Dirac dark matter is produced in a collider, it leaves a clear trace: a visible displaced vertex in association with missing energy. Moreover, pseudo-Dirac dark matter behaves Dirac-like for relic abundance and Majorana-like in direct detection experiments. We provide a general effective field theory treatment, specializing to a pseudo-Dirac bino. The dark matter mass and the mass splitting can be extracted from measurements of the decay length and the invariant mass of the products, even in the presence of missing energy.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.121802
