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Transverse polarization at electron-positron collider; Higgs production; beyond standard model; 𝑍 boson.

With the use of transverse polarization (TP), a CP-odd and T-odd observable can be constructed when the final-state particles are self-conjugate. In the case of $H Z$ production, this observable can be used to probe a certain effective four-point $e^{+} e^{-} Z H$ CP-violating coupling, not accessible without TP. Effective CP-violating $Z Z H$ coupling does not contribute to this observable. A similar observable in $\gamma Z$ production can be used to probe $e^{+} e^{-} \gamma Z$ four-point couplings.

Saurabh D Rindani¹

1. Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India

Published

November 2007