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arXiv · 1207.6234

Sneutrino Identification in Lepton Pair Production at ILC with Polarized Beams

A. V. Tsytrinov·J. Kalinowski·P. Osland·A. A. Pankov
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Abstract

Numerous non-standard dynamics are described by contact-like effective interactions that can manifest themselves in electron-positron collisions only through deviations of the observables (cross sections, asymmetries) from the Standard Model predictions. If such a deviation were observed, it would be important to identify the actual source among the possible non-standard interactions as many different new physics scenarios may lead to very similar experimental signatures. We study the possibility of uniquely identifying the indirect effects of s-channel sneutrino exchange, as predicted by supersymmetric theories with R-parity violation, against other new physics scenarios in high-energy e^+e^- annihilation into lepton pairs at the International Linear Collider. These competitive models are interactions based on gravity in large and in TeV-scale extra dimensions, anomalous gauge couplings, Z' vector bosons and compositeness-inspired four-fermion contact interactions. To evaluate the identification reach on sneutrino exchange, we use as basic observable a double polarization asymmetry, that is particularly suitable to directly test for such s-channel sneutrino exchange effects in the data analysis. The availability of both beams being polarized plays a crucial role in identifying the new physics scenario.

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A. V. Tsytrinov, J. Kalinowski, P. Osland, A. A. Pankov. 2012-07-26. Sneutrino Identification in Lepton Pair Production at ILC with Polarized Beams. https://doi.org/10.1016/j.physletb.2012.10.007

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