Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published August 8, 2012 | Published
Journal Article Open

Complex scalar singlet dark matter: Vacuum stability and phenomenology


We analyze one-loop vacuum stability, perturbativity, and phenomenological constraints on a complex singlet extension of the standard model scalar sector containing a scalar dark matter candidate. We study vacuum stability considerations using a gauge-invariant approach and compare with the conventional gauge-dependent procedure. We show that, if new physics exists at the TeV scale, the vacuum stability analysis and experimental constraints from the dark matter sector, electroweak precision data, and LEP allow both a Higgs-like scalar in the mass range allowed by the latest results from CMS and ATLAS and a lighter singlet-like scalar with weak couplings to standard model particles. If instead no new physics appears until higher energy scales, there may be significant tension between the vacuum stability analysis and phenomenological constraints (in particular electroweak precision data) to the extent that the complex singlet extension with light Higgs and singlet masses would be ruled out. We comment on the possible implications of a scalar with ∼125  GeV mass and future ATLAS invisible decay searches.

Additional Information

© 2012 American Physical Society. Received 16 April 2012; published 8 August 2012. M. G. thanks M. McCaskey for useful discussion and technical assistance, and also A. Long, P. McGuirk, and H. Patel for useful discussion. This work was supported in part by the U.S. Department of Energy Contract No. DE-FG02-08ER41531 and the Wisconsin Alumni Research Foundation.

Attached Files

Published - PhysRevD.86.043511.pdf


Files (8.4 MB)
Name Size Download all
8.4 MB Preview Download

Additional details

August 19, 2023
October 18, 2023