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Complex singlet extension of the standard model

Barger, Vernon and Langacker, Paul and McCaskey, Mathew and Ramsey-Musolf, Michael and Shaughnessy, Gabe (2009) Complex singlet extension of the standard model. Physical Review D, 79 (1). Art. No. 015018. ISSN 2470-0010. doi:10.1103/PhysRevD.79.015018.

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We analyze a simple extension of the standard model (SM) obtained by adding a complex singlet to the scalar sector (cxSM). We show that the cxSM can contain one or two viable cold dark matter candidates and analyze the conditions on the parameters of the scalar potential that yield the observed relic density. When the cxSM potential contains a global U(1) symmetry that is both softly and spontaneously broken, it contains both a viable dark matter candidate and the ingredients necessary for a strong first order electroweak phase transition as needed for electroweak baryogenesis. We also study the implications of the model for discovery of a Higgs boson at the Large Hadron Collider.

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Ramsey-Musolf, Michael0000-0001-8110-2479
Additional Information:© 2009 The American Physical Society. Received 10 November 2008; published 30 January 2009. V.B. and P.L. thank the Aspen Center for Physics for hospitality. This work was supported in part by the U.S. Department of Energy under Grant Nos. DE-FG02-95ER40896, DE-FG02-05ER41361, DE-FG02-08ER41531, and Contract No. DE-AC02-06CH11357, by the Wisconsin Alumni Research Foundation, the Institute for Advanced Study (PL), and the National Science Foundation Grant No. PHY-0503584.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-95ER40896
Department of Energy (DOE)DE-FG02-05ER41361
Department of Energy (DOE)DE-FG02-08ER41531
Department of Energy (DOE)DE-AC02-06CH11357
Wisconsin Alumni Research FoundationUNSPECIFIED
Institute for Advanced StudyUNSPECIFIED
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Record Number:CaltechAUTHORS:BARprd09
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13147
Deposited By: Archive Administrator
Deposited On:31 Jan 2009 00:07
Last Modified:08 Nov 2021 22:35

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