### Abstract

We provide a detailed, model-independent study for [Formula presented]-violation effects due to the [Formula presented]-odd top-quark electric dipole moment (EDM) and weak dipole moment (WDM) in top-quark pair production via [Formula presented] and two-photon annihilation at a Next [Formula presented] Linear Collider (NLC). There are two methods in detecting [Formula presented]-violation effects in these processes. One method makes use of measurements of various spin correlations in the final decay products of the produced top-quark pair, while the other is to measure various [Formula presented]-odd polarization asymmetry effects of the initial states. In the [Formula presented] case only the first method can be used and in the [Formula presented] case both methods can be employed. We provide a complete classification of angular correlations of the [Formula presented] and [Formula presented] decay products under [Formula presented] and [Formula presented], which greatly faciliate [Formula presented] tests in the [Formula presented] mode. Concentrating on the second method with the Compton backscattered high-energetic laser light off the electron or positron beam in the two-photon mode, we construct two [Formula presented]-odd and [Formula presented]-even initial polarization configurations and apply them to investigating [Formula presented]-violating effects due to the top-quark EDM. With a typical set of experimental parameters at the NLC, we compare the [Formula presented] sensitivities to the top-quark EDM and WDM in the [Formula presented] mode and the two-photon mode. Some model expectation values of the [Formula presented]-odd parameters are compared with the results.

Original language | English |
---|---|

Pages (from-to) | 6835-6855 |

Number of pages | 21 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 56 |

Issue number | 11 |

DOIs | |

Publication status | Published - 1997 Jan 1 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*56*(11), 6835-6855. https://doi.org/10.1103/PhysRevD.56.6835

}

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 56, no. 11, pp. 6835-6855. https://doi.org/10.1103/PhysRevD.56.6835

**[Formula presented] violation in top-quark pair production at a Next Linear Collider.** / Baek, M. S.; Choi, S. Y.; Kim, C. S.

Research output: Contribution to journal › Article

TY - JOUR

T1 - [Formula presented] violation in top-quark pair production at a Next Linear Collider

AU - Baek, M. S.

AU - Choi, S. Y.

AU - Kim, C. S.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - We provide a detailed, model-independent study for [Formula presented]-violation effects due to the [Formula presented]-odd top-quark electric dipole moment (EDM) and weak dipole moment (WDM) in top-quark pair production via [Formula presented] and two-photon annihilation at a Next [Formula presented] Linear Collider (NLC). There are two methods in detecting [Formula presented]-violation effects in these processes. One method makes use of measurements of various spin correlations in the final decay products of the produced top-quark pair, while the other is to measure various [Formula presented]-odd polarization asymmetry effects of the initial states. In the [Formula presented] case only the first method can be used and in the [Formula presented] case both methods can be employed. We provide a complete classification of angular correlations of the [Formula presented] and [Formula presented] decay products under [Formula presented] and [Formula presented], which greatly faciliate [Formula presented] tests in the [Formula presented] mode. Concentrating on the second method with the Compton backscattered high-energetic laser light off the electron or positron beam in the two-photon mode, we construct two [Formula presented]-odd and [Formula presented]-even initial polarization configurations and apply them to investigating [Formula presented]-violating effects due to the top-quark EDM. With a typical set of experimental parameters at the NLC, we compare the [Formula presented] sensitivities to the top-quark EDM and WDM in the [Formula presented] mode and the two-photon mode. Some model expectation values of the [Formula presented]-odd parameters are compared with the results.

AB - We provide a detailed, model-independent study for [Formula presented]-violation effects due to the [Formula presented]-odd top-quark electric dipole moment (EDM) and weak dipole moment (WDM) in top-quark pair production via [Formula presented] and two-photon annihilation at a Next [Formula presented] Linear Collider (NLC). There are two methods in detecting [Formula presented]-violation effects in these processes. One method makes use of measurements of various spin correlations in the final decay products of the produced top-quark pair, while the other is to measure various [Formula presented]-odd polarization asymmetry effects of the initial states. In the [Formula presented] case only the first method can be used and in the [Formula presented] case both methods can be employed. We provide a complete classification of angular correlations of the [Formula presented] and [Formula presented] decay products under [Formula presented] and [Formula presented], which greatly faciliate [Formula presented] tests in the [Formula presented] mode. Concentrating on the second method with the Compton backscattered high-energetic laser light off the electron or positron beam in the two-photon mode, we construct two [Formula presented]-odd and [Formula presented]-even initial polarization configurations and apply them to investigating [Formula presented]-violating effects due to the top-quark EDM. With a typical set of experimental parameters at the NLC, we compare the [Formula presented] sensitivities to the top-quark EDM and WDM in the [Formula presented] mode and the two-photon mode. Some model expectation values of the [Formula presented]-odd parameters are compared with the results.

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U2 - 10.1103/PhysRevD.56.6835

DO - 10.1103/PhysRevD.56.6835

M3 - Article

AN - SCOPUS:0000022277

VL - 56

SP - 6835

EP - 6855

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 11

ER -