Publication Date
2021
Journal or Book Title
Journal of High Energy Physics
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 Z(2) 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.
ISSN
1029-8479
ORCID
Bell, Nicole/0000-0002-5805-9828; Friedrich, Leon/0000-0001-7024-5335
DOI
https://doi.org/10.1007/JHEP04(2021)098
Issue
4
License
UMass Amherst Open Access Policy
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Bell, Nicole F.; Dolan, Matthew J.; Friedrich, Leon S.; Ramsey-Musolf, Michael J.; and Volkas, Raymond R., "A Real Triplet-Singlet Extended Standard Model: Dark Matter and Collider Phenomenology" (2021). Journal of High Energy Physics. 1287.
https://doi.org/10.1007/JHEP04(2021)098