Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-04-15
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, LaTex, 3 figures, 1 table, available from http://www.ifh.de/~riemanns/ or on request from e-mail: riemanns@ifh.de; to
Scientific paper
Constraints on extra neutral gauge bosons are obtained from $e^+e^-\rightarrow f\bar f$ at NLC energies. Model independent limits on the $Z'f\bar f$ couplings and lower limits on the $Z'$ mass are discussed. Typical GUTs with $M_{Z'}$ up to (3 -- 6) $\sqrt{s}$ can be excluded. A distinction between different GUT scenarios is possible if $M_{Z'}\le 3\sqrt{s}$. Radiative corrections give only small changes to the $Z'$ exclusion limits provided that appropriate cuts are applied. %The inclusion of systematic errors leads to slightly worse results for %$M_{Z'}^{lim}$.
Leike Arnd
Riemann Sabine
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