CP sensitive observables in e+e- -> neutralino_i neutralino_j and neutralino decay into the Z boson

Abstract

We study CP sensitive observables in neutralino production e+e- -> neutralino_i neutralino_j and the subsequent two-body decays of the neutralino neutralino_i -> neutralino_n Z and of the Z boson Z -> l \bar l (q \bar q). We identify the CP odd elements of the Z boson density matrix and propose CP sensitive triple-product asymmetries. We calculate these observables and the cross sections in the Minimal Supersymmetric Standard Model with complex parameters μand M_1 for an e+e- linear collider with \sqrt{s}=800 GeV and longitudinally polarized beams. We show that the asymmetries can reach 3% for Z -> l \bar l and 18% for Z -> q \bar q and discuss the feasibility of measuring these asymmetries.

21 pages, 8 figures, comments and references added; version to appear in Eur. Phys. J. C

Cited by in corpus (5)

• Spin Analysis of Supersymmetric Particles
• CP asymmetries with Longitudinal and Transverse Beam Polarizations in Neutralino Production and Decay into the Z^0 Boson at the ILC
• Selectron production at an e-e- linear collider with transversely polarized beams
• Collider searches and cosmology in the MSSM with heavy scalars
• SUSY CP phases and asymmetries at colliders