Model Independent $Z'$ Constraints at Future $e^+e^-$ Colliders}

Details Model Independent $Z'$ Constraints at Future $e^+e^-$ Colliders} Model Independent $Z'$ Constraints at Future $e^+e^-$ Colliders}

1993-11-24

arxiv.org/abs/hep-ph/9311356v1

Z.Phys. C62 (1994) 265-270

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 Latex pages, uses epsf.sty, 5 uuencoded figures obtainable via anonymous ftp from convex.ifh.de in /pub/preprint/ as file d

Scientific paper

10.1007/BF01560242

Model independent constraints on the mass of extra neutral gauge bosons and their couplings to charged leptons are given for LEP~II and a 500\,GeV $e^+e^-$ collider. Analytical exclusion limits are derived in the Born approximation. The $Z'$ limits obtained with radiative corrections are always worse than those calculated at the Born level. Polarized beams are only useful for degrees of polarization essentially larger than 50\%. Known discovery limits on extra $Z$ bosons predicted by popular $Z'$ models are reproduced as special cases. The $Z'$ constraints are compared to those predicted by four fermion contact interactions.

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