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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...

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Detalles Bibliográficos
Autores principales: Chang, Darwin, Keung, Wai-Yee, Phillips, Ivan
Lenguaje:eng
Publicado: 1994
Materias:
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(93)90536-X
http://cds.cern.ch/record/241145
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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
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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
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AT keungwaiyee cpviolationintoppairproductionataneecollider
AT phillipsivan cpviolationintoppairproductionataneecollider