CDF W mass anomaly with a Stueckelberg-Higgs portal
In: Physics Letters B, Jg. 834 (2022-11-01), Heft 137454-
Online
academicJournal
Zugriff:
We propose an explanation to the new W mass measurement recently reported by the CDF collaboration, which is larger than the standard model expectation by about 7 standard deviations. To alleviate the tensions that are imposed on the electroweak sector by the new W mass measurement, we carry out an analysis in the Stueckelberg extended standard model where a new neutral gauge boson appears which mixes with the two neutral gauge bosons in the electroweak sector both via the Stueckelberg mass terms and via the gauge invariant Stueckelberg-Higgs portal interaction and spoils the custodial symmetry at the tree level so that the simple relation between the W boson mass and the Z boson mass does not hold. We find that such an extension increases the W boson mass if the new gauge boson mass is larger than the Z boson mass. We further show that there exists a significant part of the parameter space in the extended model which includes the CDF mass anomaly and is consistent with the various observables at the Z pole and consistent with the ATLAS dilepton limits. The Stueckelberg ZSt′ boson, which resolves the CDF W mass anomaly, should be searchable in future LHC experiments.
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CDF W mass anomaly with a Stueckelberg-Higgs portal
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Autor/in / Beteiligte Person: | Du, Mingxuan ; Liu, Zuowei ; Nath, Pran |
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Zeitschrift: | Physics Letters B, Jg. 834 (2022-11-01), Heft 137454- |
Veröffentlichung: | Elsevier, 2022 |
Medientyp: | academicJournal |
ISSN: | 0370-2693 (print) |
DOI: | 10.1016/j.physletb.2022.137454 |
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