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Complex scalar singlet dark matter: Vacuum stability and phenomenology

Gonderinger, Matthew and Lim, Hyungjun and Ramsey-Musolf, Michael J. (2012) Complex scalar singlet dark matter: Vacuum stability and phenomenology. Physical Review D, 86 (4). Art. No. 043511. ISSN 1550-7998. doi:10.1103/PhysRevD.86.043511. https://resolver.caltech.edu/CaltechAUTHORS:20120907-090818088

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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.86.043511 DOIArticle
http://link.aps.org/doi/10.1103/PhysRevD.86.043511PublisherArticle
ORCID:
AuthorORCID
Ramsey-Musolf, Michael J.0000-0001-8110-2479
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.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-08ER41531
Wisconsin Alumni Research FoundationUNSPECIFIED
Issue or Number:4
Classification Code:PACS: 95.35.+d
DOI:10.1103/PhysRevD.86.043511
Record Number:CaltechAUTHORS:20120907-090818088
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120907-090818088
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33923
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Sep 2012 16:20
Last Modified:09 Nov 2021 23:05

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