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arXiv · hep-ph/0107159

New physics signatures at a Linear Collider: model-independent analysis from `conventional' polarized observables

A. A. Babich·P. Osland·A. A. Pankov·N. Paver
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Abstract

We discuss four-fermion contact-interaction searches in the processes e^+e^-\toμ^+μ^-, c{\bar c} and b{\bar b} at a future e^+e^- Linear Collider with c.m. energy \sqrt{s}=0.5 TeV and with both beams longitudinally polarized. Our analysis is based on the measurements of familiar polarized observables such as the total cross section and the forward-backward/left-right asymmetries, and accounts for the general set of contact interaction couplings as independent, non-zero, parameters thus avoiding simplifying, model-dependent, assumptions. We derive the corresponding model-independent constraints on the above-mentioned coupling constants, and evaluate the corresponding reach at the Linear Collider, emphasizing the role of beam polarization. We compare the results with a model-dependent procedure where only one coupling is varied at a time.

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A. A. Babich, P. Osland, A. A. Pankov, N. Paver. 2001-07-13. New physics signatures at a Linear Collider: model-independent analysis from `conventional' polarized observables. https://doi.org/10.1016/s0370-2693(01)01047-4

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