Charged lepton distributions as a probe of contact e+e-HZ interactions at a linear collider with polarized beams

Abstract

We examine very general four-point interactions arising from new physics and contributing to the Higgs production process e+e- -> HZ. We write all possible forms for these interactions consistent with Lorentz invariance. We allow the possibility of CP violation. Contributions to the process from anomalous ZZH and gamma ZH interactions studied earlier arise as a special case of our four-point amplitude. We consider the decay of Z into a charged lepton pair and obtain expressions for angular distributions of charged leptons arising from the interference of the four-point contribution with the standard-model contribution. We take into account possible longitudinal or transverse beam polarization likely to be available at a linear collider. We examine several correlations which can be used to study the various form factors present in the e+e-HZ contact interactions. We also obtain the sensitivity of these correlations in constraining the new-physics interactions at a linear collider operating at a centre-of-mass energy of 500 GeV with longitudinal or transverse polarization.

29 pages, Latex, figures included in submission, references added in v2

References in corpus (14)

• Signatures of anomalous VVH interactions at a linear collider
• Transverse beam polarization and CP-violating triple-gauge-boson couplings in e+e- -> gamma Z
• CP violation at a linear collider with transverse polarization
• CP-odd observables in neutralino production with transverse e+ and e- beam polarization
• Neutralino Production and Decay at an e^+e^- Linear Collider with Transversely Polarized Beams
• Probing CP-violating contact interactions in e+e- --> HZ with polarized beams
• CP asymmetries with Longitudinal and Transverse Beam Polarizations in Neutralino Production and Decay into the Z^0 Boson at the ILC
• Selectron production at an e-e- linear collider with transversely polarized beams
• New physics in e+ e- -> Z gamma with polarized beams
• Fermionic Effective Operators and Higgs Production at a Linear Collider
• Probing the CP nature of Higgs boson through e^-e^+ --> e^-e^+ phi
• Using Spin Correlations to Distinguish Zh from ZA at the International Linear Collider
• Role of transverse polarization in constraining new physics
• Positron Polarization at the International Linear Collider

Cited by in corpus (11)

• Angular distributions as a probe of anomalous ZZH and gammaZH interactions at a linear collider with polarized beams
• Role of polarization in probing anomalous gauge interactions of the Higgs boson
• Model-independent analysis of Higgs spin and CP properties in the process $e^{+}{e}^{-}\to t\bar{t}\Phi$
• Use of transverse beam polarization to probe anomalous VVH interactions at a Linear Collider
• Decay-lepton correlations as probes of anomalous ZZH and gammaZH interactions in e+e- --> ZH with polarized beams
• Probing the indefinite CP nature of the Higgs Boson through decay distributions in the process $e^{+}{e}^{-}\to t\bar{t}\Phi$
• Top Yukawa coupling measurement with indefinite CP Higgs in $e^{+}{e}^{-}\to t\bar{t}\Phi$
• Two-particle kinematic distributions from new physics at an electron-positron collider with polarized beams
• Top-spin analysis of new scalar and tensor interactions in e^+ e^- collisions with beam polarization
• Use of Transverse polarization to probe R-parity violating supersymmetry at ILC
• Effective fermion-Higgs interactions at an $e^{+}{e}^{-}$ collider with polarized beams