New flavor changing interactions in extended gauge models

Details New flavor changing interactions in extended gauge models New flavor changing interactions in extended gauge models

1992-11-13

arxiv.org/abs/hep-ph/9211246v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

in LaTex, 5 pages, + 1 PostScript figure appended after \end{document} (and available upon request)

Scientific paper

A new class of flavor changing (FC) neutral interactions can arise in models based on extended gauge groups (rank $>$4) when new charged fermions are present together with new neutral gauge bosons. In some cases the FC couplings to a new $Z_1$ are expected to be sizeable, implying that the $Z_1$ mass must be large enough as to explain the observed suppression of FC transitions. Concentrating on E$_6$ models and assuming for the FC parameters a theoretically natural range of values, I show that in most cases the presence of a $Z_1$ much lighter than 1 TeV is unlikely.

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