Full parameter scan of the Zee model: exploring Higgs lepton flavor violation

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dc.contributor.authorHerrero-García, J.
dc.contributor.authorOhlsson, T.
dc.contributor.authorRiad, S.
dc.contributor.authorWirén, J.
dc.date.issued2017
dc.descriptionPublished: April 21, 2017
dc.description.abstractWe study the general Zee model, which includes an extra Higgs scalar doublet and a new singly-charged scalar singlet. Neutrino masses are generated at one-loop level, and in order to describe leptonic mixing, both the Standard Model and the extra Higgs scalar doublets need to couple to leptons (in a type-III two-Higgs doublet model), which necessarily generates large lepton flavor violating signals, also in Higgs decays. Imposing all relevant phenomenological constraints and performing a full numerical scan of the parameter space, we find that both normal and inverted neutrino mass orderings can be fitted, although the latter is disfavored with respect to the former. In fact, inverted ordering can only be accommodated if θ₂₃ turns out to be in the first octant. A branching ratio for h → τμ of up to 10⁻² is allowed, but it could be as low as 10⁻⁶. In addition, if future expected sensitivities of τ → μγ are achieved, normal ordering can be almost completely tested. Also, μe conversion is expected to probe large parts of the parameter space, excluding completely inverted ordering if no signal is observed. Furthermore, non-standard neutrino interactions are found to be smaller than 10⁻⁶, which is well below future experimental sensitivity. Finally, the results of our scan indicate that the masses of the additional scalars have to be below 2.5 TeV, and typically they are lower than that and therefore within the reach of the LHC and future colliders.
dc.description.statementofresponsibilityJuan Herrero-García, Tommy Ohlsson, Stella Riad and Jens Wirén
dc.identifier.citationThe Journal of High Energy Physics, 2017; 2017(4):130-0-130-44
dc.identifier.doi10.1007/JHEP04(2017)130
dc.identifier.issn1126-6708
dc.identifier.issn1029-8479
dc.identifier.orcidHerrero-García, J. [0000-0002-3300-0029]
dc.identifier.urihttp://hdl.handle.net/2440/109361
dc.language.isoen
dc.publisherInstitute of Physics Publishing
dc.relation.granthttp://purl.org/au-research/grants/arc/CE1101004
dc.rights© The Author(s) 2017. Article funded by SCOAP3. Open Access. 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.
dc.source.urihttps://doi.org/10.1007/jhep04(2017)130
dc.subjectNeutrino Physics; Beyond Standard Model; Higgs Physics
dc.titleFull parameter scan of the Zee model: exploring Higgs lepton flavor violation
dc.typeJournal article
pubs.publication-statusPublished

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