CP Violation in top pair production at an e^+e^- collider

Abstract

We investigate possible CP violating effects in $e^{+}{e}^{-}$ annihilation into top quark pairs. One of the interesting observable effects is the difference in production rates between the two CP conjugate polarized states $t_L{\bar{t}}_L$ and $t_R{\bar{t}}_R$. The result is an asymmetry in the energy spectra of the lepton and the anti-lepton from the heavy quark decays. Another CP-odd observable is the up-down asymmetry of the leptons with respect to the reaction plane. These two asymmetries measure complementarily the absorptive and dispersive form factors of the electric dipole moment. Finally, as an illustration, we calculate the size of the CP violating form factors in a model where the CP nonconservation originates from the Yukawa couplings of a neutral Higgs boson.

16 pages, including postscript graphs not posted before

References in corpus (1)

• CP Violation in the Decay of Neutral Higgs Boson into $t-\bar{t}$ or $W^{+}-W^{-}$

Cited by in corpus (52)

• The Standard Model as an Effective Field Theory
• Effective-Field-Theory Approach to Top-Quark Production and Decay
• CP Violation in Top Physics
• Tracing CP violation in the production of top quark pairs by multiple TeV proton-proton collisions
• Dimension-six CP-violating operators of the third-family quarks and their effects at colliders
• Top Dipole Form Factors and Loop-induced CP-violation in Supersymmetry
• Effect of anomalous tbW vertex on decay-lepton distributions in e+e- -> t tbar and CP-violating asymmetries
• Probing the Chromoelectric and Chromomagnetic dipole moments of the Top quark at Hadronic Colliders
• CP violating anomalous top-quark couplings at the LHC
• Optimal-Observable Analysis of the Angular and Energy Distributions for Top-Quark Decay Products at Polarized Linear Colliders
• CP-Violatiing Asymmetries in $e^+e^-\ra t\bar{t}$ with Longitudinally Polarized Elecrtons
• Top Quarks and $CP$ Violation in Polarized $e^{+}{e}^{-}$ Collisions
• Phenomenology of a non-standard top quark Yukawa coupling
• Energy Spectrum of Secondary Leptons in $e^{+}{e}^{-}\to t\bar{t}$ - Non-standard Interactions and CP Violation -
• Four-Fermi Effective Operators in Top-Quark Production and Decay
• A Probe of New Physics in Top Quark Pair Production at $e^{-}{e}^{+}$ Colliders
• CP Violation, Top Quarks and the Tevatron Upgrade
• The Decay Rate Asymmetry of the Top Quark
• Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar
• Probing Top-Quark Couplings at Polarized NLC
• CP-odd correlations using jet momenta from tt_bar events at the Tevatron
• CP Violation in Top Quark Pair Production at Hadron Colliders
• Decay-lepton angular distribution in polarized $e^{+}{e}^{-}\to$ and $CP$-violating dipole couplings of the top quark
• CP-Violating Lepton-Energy Correlation in e\bar{e}\to t\bar{t}
• CP violation in the cubic coupling of neutral gauge bosons
• Simple decay-lepton asymmetries in polarized e+e- -> t tbar and CP-violating dipole couplings of the top quark
• Optimal-Observable Analysis of Possible New Physics Using the b-quark in gamma gamma -> tt -> bX
• CP violation in tbW couplings at the LHC
• Optimal Beam Polarizations for New-Physics Search through gamma gamma -> t tbar -> lX/bX
• Effects of Non-Standard Interactions for the Energy Spectrum of Secondary Leptons in e^+e^- --> t t-bar
• CP Violation in {\boldmath $H \ra t \overline{t}$} Decays at {\boldmath $\epem$} Colliders
• Single decay-lepton angular distributions in polarized e+e- --> t tbar and simple angular asymmetries as a measure of CP-violating top dipole couplings
• Effective lagrangian description of top production and decay
• CP violation at colliders
• CP violation in e+e- -> t tbar: Energy Asymmetries and Optimal Observables of b and bbar Quarks
• CP violation in the top-quark system through light squarks
• 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-odd static electromagnetic properties of the W gauge boson and the t quark via the anomalous tbW coupling
• CP violating asymmetries of b quarks and leptons in e^+e^- \to t\bar t and supersymmetry (review)
• CP-violating dipole form factors of the top quark and tau lepton in scalar leptoquark models
• Testing Scalar-Sector CP Violation in Top-Quark Production and Decay at Linear e+e- Colliders
• A Model-independent Description of New Physics effects in e+e- to t tbar
• QCD corrections to the production of $t\bar{t}\gamma$ at the ILC
• A supersimple analysis of $e^{-}{e}^{+}\to t\bar{t}$ at high energy
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Electroweak dipole moment form factors of the top quark in supersymmetry
• Energy correlation of bottom quarks from decays of top quarks in electron$-$positron annihilation
• Decay-lepton angular distributions in e+e- -> t tbar to O(alpha_s) in the soft-gluon approximation
• Inelastic Rescattering and CP Asymmetries in D -> pi+ pi-, pi0 pi0
• Remark on CP-violating Polarization Asymmetry of tt-bar via Anomalous Couplings to gamma and Z
• QCD corrections to decay-lepton polar and azimuthal angular distributions in e+e- -> t tbar in the soft-gluon approximation