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CP violating scalar Dark Matter

CP violating scalar Dark Matter
CP violating scalar Dark Matter
We study an extension of the Standard Model (SM) in which two copies of the SM scalar $SU(2)$ doublet which do not acquire a Vacuum Expectation Value (VEV), and hence are \textit{inert}, are added to the scalar sector. We allow for CP-violation in the \textit{inert} sector, where the lightest \textit{inert} state is protected from decaying to SM particles through the conservation of a $Z_2$ symmetry. The lightest neutral particle from the \textit{inert} sector, which has a mixed CP-charge due to CP-violation, is hence a Dark Matter (DM) candidate. We discuss the new regions of DM relic density opened up by CP-violation, and compare our results to the CP-conserving limit and the Inert Doublet Model (IDM). We constrain the parameter space of the CP-violating model using recent results from the Large Hadron Collider (LHC) and DM direct and indirect detection experiments.
hep-ph
1029-8479
Cordero-Cid, A.
18e7d36c-f706-46d9-869a-42e8faa4c823
Hernández-Sánchez, J.
949d6d0b-c5e3-4fae-a99c-818b6da1361b
Keus, V.
f56212de-96d7-4955-8c56-561910f7f167
King, S. F.
f8c616b7-0336-4046-a943-700af83a1538
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Rojas, D.
94c200a8-ca52-47f1-b05d-310dafb2f712
Sokołowska, D.
f8acd9da-3d5a-4bee-8671-45e6d0192a4b
Cordero-Cid, A.
18e7d36c-f706-46d9-869a-42e8faa4c823
Hernández-Sánchez, J.
949d6d0b-c5e3-4fae-a99c-818b6da1361b
Keus, V.
f56212de-96d7-4955-8c56-561910f7f167
King, S. F.
f8c616b7-0336-4046-a943-700af83a1538
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Rojas, D.
94c200a8-ca52-47f1-b05d-310dafb2f712
Sokołowska, D.
f8acd9da-3d5a-4bee-8671-45e6d0192a4b

Cordero-Cid, A., Hernández-Sánchez, J., Keus, V., King, S. F., Moretti, S., Rojas, D. and Sokołowska, D. (2016) CP violating scalar Dark Matter. Journal of High Energy Physics, 12, [14]. (doi:10.1007/JHEP12(2016)014).

Record type: Article

Abstract

We study an extension of the Standard Model (SM) in which two copies of the SM scalar $SU(2)$ doublet which do not acquire a Vacuum Expectation Value (VEV), and hence are \textit{inert}, are added to the scalar sector. We allow for CP-violation in the \textit{inert} sector, where the lightest \textit{inert} state is protected from decaying to SM particles through the conservation of a $Z_2$ symmetry. The lightest neutral particle from the \textit{inert} sector, which has a mixed CP-charge due to CP-violation, is hence a Dark Matter (DM) candidate. We discuss the new regions of DM relic density opened up by CP-violation, and compare our results to the CP-conserving limit and the Inert Doublet Model (IDM). We constrain the parameter space of the CP-violating model using recent results from the Large Hadron Collider (LHC) and DM direct and indirect detection experiments.

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More information

Accepted/In Press date: 17 November 2016
e-pub ahead of print date: 5 December 2016
Published date: 5 December 2016
Additional Information: 42 pages, 22 figures
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 410384
URI: http://eprints.soton.ac.uk/id/eprint/410384
ISSN: 1029-8479
PURE UUID: b910aa6b-76f4-403e-9006-74fe236aff84

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Date deposited: 07 Jun 2017 16:31
Last modified: 06 Oct 2020 18:55

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