Signals of additional Z ` boson in e(+)e(-) -> W+W- at the ILC with polarized beams

Ananthanarayan, B and Patra, Monalisa and Poulose, P (2011) Signals of additional Z ` boson in e(+)e(-) -> W+W- at the ILC with polarized beams. [Preprint]

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Abstract

We consider the possibility of fingerprinting the presence of heavy additional Z' bosons that arise naturally in extensions of the standard model such as E-6 models and left-right symmetric models, through their mixing with the standard model Z boson. By considering a class of observables including total cross sections, energy distributions and angular distributions of decay leptons we find significant deviation from the standard model predictions for these quantities with right-handed electrons and left-handed positrons at root s= 800GeV. The deviations being less pronounced at smaller centre of mass energies as the models are already tightly constrained. Our work suggests that the ILC should have a strong beam polarization physics program particularly with these configurations. On the other hand, a forward backward asymmetry and lepton fraction in the backward direction are more sensitive to new physics with realistic polarization due to interesting interplay with the neutrino t-channel diagram. This process complements the study of fermion pair production processes that have been considered for discrimination between these models.

Item Type:	Preprint
Publication:	Journal of High Energy Physics
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Institute of Physics.
Keywords:	e plus -e-; Experiments
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	29 Mar 2011 09:34
Last Modified:	29 Mar 2011 09:34
URI:	http://eprints.iisc.ac.in/id/eprint/36348

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