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CP violation in top pair production at an e+e- collider
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...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
1994
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/0550-3213(93)90536-X http://cds.cern.ch/record/241145 |
_version_ | 1780884982678421504 |
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author | Chang, Darwin Keung, Wai-Yee Phillips, Ivan |
author_facet | Chang, Darwin Keung, Wai-Yee Phillips, Ivan |
author_sort | Chang, Darwin |
collection | CERN |
description | 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. |
id | cern-241145 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1994 |
record_format | invenio |
spelling | cern-2411452023-03-14T19:27:01Zdoi:10.1016/0550-3213(93)90536-Xhttp://cds.cern.ch/record/241145engChang, DarwinKeung, Wai-YeePhillips, IvanCP violation in top pair production at an e+e- colliderParticle Physics - PhenomenologyWe 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.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.We investigate possible CP violating effects in e + e − annilation 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 t L and t R 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.hep-ph/9301259CERN-TH-6658-92-REVNUHEP-TH-92-17-REVCERN-TH-6658-92-REVNUHEP-TH-92-17-REVoai:cds.cern.ch:2411451994 |
spellingShingle | Particle Physics - Phenomenology Chang, Darwin Keung, Wai-Yee Phillips, Ivan CP violation in top pair production at an e+e- collider |
title | CP violation in top pair production at an e+e- collider |
title_full | CP violation in top pair production at an e+e- collider |
title_fullStr | CP violation in top pair production at an e+e- collider |
title_full_unstemmed | CP violation in top pair production at an e+e- collider |
title_short | CP violation in top pair production at an e+e- collider |
title_sort | cp violation in top pair production at an e+e- collider |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/0550-3213(93)90536-X http://cds.cern.ch/record/241145 |
work_keys_str_mv | AT changdarwin cpviolationintoppairproductionataneecollider AT keungwaiyee cpviolationintoppairproductionataneecollider AT phillipsivan cpviolationintoppairproductionataneecollider |