أعرض تسجيلة المادة بشكل مبسط

dc.creator Bernabéu, José
dc.creator Nardi, Enrico
dc.creator Tommasini, Daniele
dc.date 2007-12-21T12:22:11Z
dc.date 2007-12-21T12:22:11Z
dc.date 1993-11-22
dc.date.accessioned 2017-01-31T00:59:28Z
dc.date.available 2017-01-31T00:59:28Z
dc.identifier Nuclear Physics B 409(1): 69-86
dc.identifier <http://hdl.handle.net/2027.42/30445>
dc.identifier http://www.sciencedirect.com/science/article/B6TVC-4719VT3-2P1/2/9966d03cfd3e8dade1d48b51f63ba2cb
dc.identifier http://hdl.handle.net/10261/2565
dc.identifier 10.1016/0550-3213(93)90446-V
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/2027
dc.description 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 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 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.description One of us (D.T.) acknowledges a post-doc fellowship from the Spanish Ministry of Education and Science. This work has been partially supported by CICYT (Spain), under grant AEN/90-0040.
dc.description Peer reviewed
dc.language eng
dc.publisher Elsevier
dc.rights closedAccess
dc.subject Elementary Particles
dc.subject Particle Physics
dc.subject Theoretical Physics
dc.title μ-e conversion in nuclei and Z' physics
dc.type Artículo


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أعرض تسجيلة المادة بشكل مبسط