CP violating angular asymmetries of b and bbar quarks in e+e- -> t tbar

Abstract

We obtain analytical formulae for the cross section and the angular distributions of the b(bbar) quarks in the process e+e- -> t tbar, with t -> W+ b (tbar -> W- bbar) assuming CP violation in the γt tbar and Z t tbar vertices. We present CP violating asymmetries, which measure separately the real and imaginary parts of the electroweak dipole moment form factors of the top, d^γ(s) and d^{Z}(s). We give a numerical analysis of these asymmetries within the Minimal Supersymmetric Standard Model with complex parameters. They turn out to be of order <= 10^{-3}.

22 pages LaTeX with 3x3 figures included; some definitions for polarization asymmetries and some notations are changed and some references added

References in corpus (2)

• CP Violation In Single Top Production And Decay Via p p-bar -> t b-bar +X -> W^+ b b-bar +X Within The MSSM: A Possible Application For Measuring \arg(A_t) At Hadron Colliders
• CP Violation in the Top-Quark Pair Production at a Next Linear Collider

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• Optimal-Observable Analysis of the Angular and Energy Distributions for Top-Quark Decay Products at Polarized Linear Colliders
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• A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino
• CP asymmetries in scalar bottom quark decays
• CP violation in e+e- -> t tbar: Energy Asymmetries and Optimal Observables of b and bbar Quarks
• Probe of CP Violation in e+e- -> ttbar Near Threshold
• Polarized Single Top Production at Leptonic Colliders from Broken R Parity Interactions Incorporating CP Violation
• CP violation in decays of the lightest supersymmetric particle with bilinearly broken R parity
• CP violating Z t anti-t and gamma t anti-t Couplings at a Future e+ e- Collider
• Decay-lepton angular distributions in e+e- -> t tbar to O(alpha_s) in the soft-gluon approximation
• Remark on CP-violating Polarization Asymmetry of tt-bar via Anomalous Couplings to gamma and Z
• Energy and angular distributions of the bottom quark in the electron-positron annihilation $e^{+}{e}^{-}\to b{W}^{+}\bar{t}$