A real triplet-singlet extended Standard Model: dark matter and collider phenomenology
Abstract
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.
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.Attached Files
Published - Bell2021_Article_ARealTriplet-singletExtendedSt.pdf
Accepted Version - 2010.13376.pdf
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Additional details
- Eprint ID
- 108708
- Resolver ID
- CaltechAUTHORS:20210413-074958560
- SCOAP3
- Created
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2021-04-13Created from EPrint's datestamp field
- Updated
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2021-08-11Created from EPrint's last_modified field