Effects of CP-violating phases in supersymmetry

Abstract

Recent studies about the impact of the CP-violating complex parameters in supersymmetry on the decays of third generation squarks and about T-odd asymmetries in neutralino and chargino production and decay are reviewed. The CP-even branching ratios of the third generation squarks show a pronounced dependence on the phases of A_t, A_b, mu and M_1 in a large region of the supersymmetric parameter space. This could have important implications for stop and sbottom searches and the MSSM parameter determination in future collider experiments. We have estimated the expected accuracy in the determination of the parameters by global fits of measured masses, decay branching ratios and production cross sections. We have found that the parameter A_t can be determined with an error of 2 - 3%, whereas the error on A_b is likely to be of the order of 50 - 100%. In addition we have studied CP-odd observables, like asymmetries based on triple product correlations, which are necessary to unambiguously establish CP violation. We have analysed these asymmetries in neutralino and chargino production with subsequent three-body decays at the International Linear Collider with longitudinally polarised beams in the MSSM with complex parameters M_1 and mu. The asymmetries, which appear already at tree-level because of spin correlation between production and decay, can be as large as 20% and will therefore be an important tool for the search for CP-violating effects in supersymmetry.

arXiv comment13 pages, LaTeX, 7 eps figures, uses appolb.cls, presented at the final meeting of the European Network ``Physics at Colliders'', Montpellier, September 26 - 27, 2004

References in corpus (37)

• TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
• A new limit on the permanent electric dipole moment of ^{199}Hg
• The Chromoelectric and Purely Gluonic Operator Contributions to the Neutron Electric Dipole Moment in N=1 Supergravity
• Impact of CP phases on the search for sleptons tau and nu_tau
• S-brane Solutions in Supergravity Theories
• CP-Violating Phases in SUSY, Electric Dipole Moments, and Linear Colliders
• Analysis of the Neutralino System in Supersymmetric Theories
• Electron and Neutron Electric Dipole Moments in the Constrained MSSM
• Reconstructing the Chargino System at $e^{+}{e}^{-}$ Linear Colliders
• Electric Dipole Moment Constraints on Phases in the Constrained MSSM
• Linear Collider Physics Resource Book for Snowmass 2001 - Part 2: Higgs and Supersymmetry Studies
• General Flavor Blind MSSM and CP Violation
• Effect of supersymmetric phases on lepton dipole moments and rare lepton decays
• CP asymmetries in neutralino production in e+e- collisions
• Fermion polarization in sfermion decays as a probe of CP phases in the MSSM
• Top Squarks and Bottom Squarks in the MSSM with Complex Parameters
• A T-odd asymmetry in neutralino production and decay
• Chargino Pair Production at $e^{+}{e}^{-}$ Colliders with Polarized Beams
• Analysis of CP Violation in Neutralino Decays to Tau Sleptons
• Impact of CP phases on stop and sbottom searches
• CP violation in selectron cascade decays e_L -> e X_2^0 -> e X_1^0 mu+ mu-
• CP violation in X_1^0 X_2^0 production at a linear collider
• T-odd Correlations in the Decay of Scalar Fermions
• CP sensitive observables in chargino production with transverse $e^{\pm }$ beam polarization
• CP sensitive observables in chargino production and decay into a W boson
• CP violation in chargino production and decay into sneutrino
• Triple product correlations in top squark decays
• Neutralino Pair Production and 3-Body Decays at $e^{+}{e}^{-}$ Linear Colliders as Probes of CP Violation in the Neutralino System
• Determining SUSY Parameters in Chargino Pair-Production in $e^{+}{e}^{-}$ Collisions
• Analysis of the Neutralino System in Supersymmetric Theories -- Addendum --
• Impact of SUSY CP Phases on Stop and Sbottom Decays in the MSSM
• The Higgs Boson Masses of the Complex MSSM: A Complete One-Loop Calculation
• Polarization and Spin Effects in Neutralino Production and Decay
• Phenomenology of stops, sbottoms, tau-sneutrinos, and staus at an e+e- Linear Collider
• Impact of beam polarization on CP asymmetries in neutralino pair production
• Probing the Majorana Nature and CP Properties of Neutralinos
• Impact of CP phases on the search for top and bottom squarks

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