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A real triplet-singlet extended Standard Model: dark matter and collider phenomenology

Bell, Nicole F. and Dolan, Matthew J. and Friedrich, Leon S. and Ramsey-Musolf, Michael J. and Volkas, Raymond R. (2021) A real triplet-singlet extended Standard Model: dark matter and collider phenomenology. Journal of High Energy Physics, 2021 (4). Art. No. 98. ISSN 1029-8479. doi:10.1007/jhep04(2021)098.

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We examine the collider and dark matter phenomenology of the Standard Model extended by a hypercharge-zero SU(2) triplet scalar and gauge singlet scalar. In particular, we study the scenario where the singlet and triplet are both charged under a single ℤ₂ symmetry. We find that such an extension is capable of generating the observed dark matter density, while also modifying the collider phenomenology such that the lower bound on the mass of the triplet is smaller than in minimal triplet scalar extensions to the Standard Model. A high triplet mass is in tension with the parameter space that leads to novel electroweak phase transitions in the early universe. Therefore, the lower triplet masses that are permitted in this extended model are of particular importance for the prospects of successful electroweak baryogenesis and the generation of gravitational waves from early universe phase transitions.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Bell, Nicole F.0000-0002-5805-9828
Dolan, Matthew J.0000-0003-3420-8718
Friedrich, Leon S.0000-0001-7024-5335
Ramsey-Musolf, Michael J.0000-0001-8110-2479
Volkas, Raymond R.0000-0002-4254-8520
Additional Information:© 2021 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Article funded by SCOAP3. Received: November 6, 2020; Revised: February 2, 2021; Accepted: February 24, 2021; Published: April 12, 2021.
Funding AgencyGrant Number
Subject Keywords:Beyond Standard Model; Higgs Physics
Issue or Number:4
Record Number:CaltechAUTHORS:20210413-074958560
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Official Citation:Bell, N.F., Dolan, M.J., Friedrich, L.S. et al. A real triplet-singlet extended Standard Model: dark matter and collider phenomenology. J. High Energ. Phys. 2021, 98 (2021).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108708
Deposited By: Tony Diaz
Deposited On:13 Apr 2021 21:50
Last Modified:11 Aug 2021 22:22

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