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Mu-e conversion in nuclei and z' physics
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| dc.contributor.author | Bernabeu Alberola, José | |
| dc.contributor.author | Nardi, Enrico | |
| dc.contributor.author | Tommasini, Daniele | |
| dc.date.accessioned | 2016-05-03T10:22:54Z | |
| dc.date.available | 2016-05-03T10:22:54Z | |
| dc.date.issued | 1993 | |
| dc.identifier.citation | Bernabeu Alberola, José; Nardi, Enrico; Tommasini, Daniele (1993) Mu-e conversion in nuclei and z' physics Nuclear Physics B 409 1 69 86 | |
| dc.identifier.uri | http://hdl.handle.net/10550/53248 | |
| dc.description.abstract | Together with the existence of new neutral gauge bosons, models based on extended gauge groups (rank >4) often predict also new charged fermions. A mixing of the known fermions with new states with {\it exotic} weak-isospin assignments (left-handed singlets and right-handed doublets) will induce tree level flavour changing neutral interactions mediated by Z exchange, while if the mixing is only with new states with {\it ordinary} weak-isospin assignments, the flavour changing neutral currents are mainly due to the exchange of the lightest new neutral gauge boson Z′. We show that the present experimental limits on μ−e conversion in nuclei give a nuclear-model-independent bound on the Z-e-μ vertex which is twice as strong as that obtained from μ→eee. In the case of E6 models these limits provide quite stringent constraints on the Z′ mass and on the Z−Z′ mixing angle. We point out that the proposed experiments to search for μ−e conversion in nuclei have good chances to find evidence of lepton flavour violation, either in the case that new exotic fermions are present at the electroweak scale, or if a new neutral gauge boson Z′ of E6 origin lighter than a few TeV exists. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Nuclear Physics B, 1993, vol. 409, num. 1, p. 69-86 | |
| dc.subject | Física | |
| dc.title | Mu-e conversion in nuclei and z' physics | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2016-05-03T10:22:54Z | |
| dc.identifier.doi | 10.1016/0550-3213(93)90446-V | |
| dc.identifier.idgrec | 069051 | |
| dc.rights.accessRights | open access | es_ES |
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