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

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Cited by in corpus (20)

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• Spin Analysis of Supersymmetric Particles
• CP sensitive observables in chargino production and decay into a W boson
• Neutralino Production and Decay at an e^+e^- Linear Collider with Transversely Polarized Beams
• CP-odd observables in neutralino production with transverse e+ and e- beam polarization
• Consistent on shell renormalisation of electroweakinos in the complex MSSM: LHC and LC predictions
• Triple product correlations in top squark decays
• CP-violating asymmetry in chargino decay into neutralino and W boson
• CP asymmetries with Longitudinal and Transverse Beam Polarizations in Neutralino Production and Decay into the Z^0 Boson at the ILC
• CP asymmetries in scalar bottom quark decays
• CP asymmetries in chargino production and decay: the three-body decay case
• Selectron production at an e-e- linear collider with transversely polarized beams
• Normal tau polarisation as a sensitive probe of CP violation in chargino decay
• Collider searches and cosmology in the MSSM with heavy scalars
• Measurement of CP asymmetries in neutralino production at the ILC
• Testing the CP-violating MSSM in stau decays at the LHC and ILC
• CP asymmetries in the supersymmetric trilepton signal at the LHC
• SUSY CP phases and asymmetries at colliders