https://doi.org/10.1140/epjc/s10052-011-1854-4
Regular Article - Theoretical Physics
Measurement of CP asymmetries in neutralino production at the ILC
1
Departamento de Física Teórica y del Cosmos and CAFPE, Universidad de Granada, 18071, Granada, Spain
2
University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
3
DESY, Notkestrasse 85, 22607, Hamburg, Germany
4
CERN, 1211, Geneve 23, Switzerland
* e-mail: gudrid.moortgat-pick@desy.de
Received:
19
August
2011
Revised:
5
December
2011
Published online:
10
January
2012
We study the prospects to measure the CP-sensitive triple-product asymmetries in neutralino production 
and subsequent leptonic two-body decays 
, 
, for ℓ=e,μ, within the Minimal Supersymmetric Standard Model. We include a full detector simulation of the International Large Detector for the International Linear Collider. The simulation was performed at a center-of-mass energy of 
GeV, including the relevant Standard Model background processes, a realistic beam energy spectrum, beam backgrounds and a beam polarization of 80% and −60% for the electron and positron beams, respectively. In order to effectively disentangle different signal samples and reduce SM and SUSY backgrounds we apply a method of kinematic reconstruction. Assuming an integrated luminosity of 500 fb−1 collected by the experiment and the performance of the current ILD detector, we arrive at a relative measurement accuracy of 10% for the CP-sensitive asymmetry in our scenario. We demonstrate that our method of signal selection using kinematic reconstruction can be applied to a broad class of scenarios and it allows disentangling processes with similar kinematic properties.
© Springer-Verlag / Società Italiana di Fisica, 2012
