Probing Higgs Sector CP Violation with Top Quarks at a Photon Linear Collider

Abstract

We investigate for two-Higgs doublet models with intrinsic CP violation in the scalar potential CP-nonconserving effects in unpolarized $\gamma \gamma \to t\bar{t}$ for a range of neutral Higgs boson masses which includes resonant $\phi$ production and the subsequent decay of $\phi \to t\bar{t}$. The importance of taking into account, even in the resonant case, the interference with the nonresonant background is shown. Further, we propose and calculate three asymmetries which efficiently trace CP-violating effects in $\gamma \gamma \to t\bar{t}$ using semileptonic $t\bar{t}$ decays.

13 pages, plain TeX; 6 figures available upon request from [email protected]

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• CP Violation in {\boldmath $H \ra t \overline{t}$} Decays at {\boldmath $\epem$} Colliders
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• Transverse Polarization of Top Quarks Produced at a Photon-Photon Collider
• CP violation in Higgs decays
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Cited by in corpus (16)

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• Fermion Dipole Moments in Supersymmetric Models with Explicitly Broken R-parity
• Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar
• QCD Corrections to Decay Distributions of Neutral Higgs Bosons with (In)definite CP Parity
• Optimal-Observable Analysis of Possible New Physics Using the b-quark in gamma gamma -> tt -> bX
• Optimal Beam Polarizations for New-Physics Search through gamma gamma -> t tbar -> lX/bX
• CP violation in tbW couplings at the LHC
• Probing CP Violation in $\gamma \gamma \to W^{+}{W}^{-}$ with Polarized Photon Beams
• Probe of CP Violation in e+e- -> ttbar Near Threshold
• CP-odd static electromagnetic properties of the W gauge boson and the t quark via the anomalous tbW coupling
• Top quark pair production and decay at a polarized photon collider
• CP Violation in $\gamma \gamma \to t\bar{t}$ within the Minimal Supersymmetric Standard Model
• Indirect Signatures of CP Violation in the Processes $\gamma \gamma \to \gamma \gamma$, $\gamma Z$, and $ZZ$