New physics in e+ e- -> Z gamma with polarized beams
Abstract
We present a complete description of angular distributions in the presence of new interactions for the process e+ e- -> Z gamma with polarized beams at future linear colliders, by considering the most general form-factors allowed by gauge invariance. We include the possibility of CP violation, and classify the couplings according to their CP properties. Chirality conserving and chirality violating couplings give rise to distinct dependence on beam polarization. We present a comprehensive discussion including both types of couplings and provide a detailed comparison of the effects due to each. We discuss some selected asymmetries which would enable isolating effects of the CP-violating form-factors. We also present sensitivities on the corresponding couplings achievable at a future linear collider with realistic polarization and luminosity.
Cite
@article{arxiv.hep-ph/0507037,
title = {New physics in e+ e- -> Z gamma with polarized beams},
author = {Balasubramanian Ananthanarayan and Saurabh D. Rindani},
journal= {arXiv preprint arXiv:hep-ph/0507037},
year = {2007}
}
Comments
18 pages latex, using JHEP style; version to appear in JHEP. Compared to v1, now has an extended discussion on nature of contact interactions; simplified notation, extended discussion on CP properties of couplings, improved discussion on numerical results, typos corrected in Appendix A, additional reference to PDG provided