Muon anomalous magnetic moment, lepton flavor violation, and flavor changing neutral current processes in supersymmetric grand unified theory with right-handed neutrinos

Seungwon Baek, Toru Goto, Yasuhiro Okada, Ken ichi Okumura

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Abstract

Motivated by the large mixing angle solutions for the atmospheric and solar neutrino anomalies, flavor changing neutral current processes and lepton flavor violating processes as well as the muon anomalous magnetic moment are analyzed in the framework of SU(5) supersymmetric grand unified theory (SUSY GUT) with right-handed neutrinos. In order to explain realistic mass relations for quarks and leptons, we take into account the effects of higher dimensional operators above the GUT scale. It is shown that the supersymmetric contributions to the (Formula presented) violation parameter in (Formula presented) mixing, (Formula presented) the (Formula presented) branching ratio, and the muon anomalous magnetic moment become large in a wide range of parameter space. We also investigate the correlations among these quantities. Within the current experimental bound of (Formula presented) large SUSY contributions are possible either in the muon anomalous magnetic moment or in (Formula presented) In the former case, the favorable value of the recent muon anomalous magnetic moment measurement at the BNL E821 experiment can be accommodated. In the latter case, the allowed region of the Kobayashi-Maskawa phase can be different from the prediction within the standard model (SM) and therefore measurements of the (Formula presented) asymmetry of the (Formula presented) mode and (Formula presented) could discriminate this case from the SM. We also show that the (Formula presented) branching ratio can be close to the current experimental upper bound and the mixing induced (Formula presented) asymmetry of the radiative B decay can be enhanced in the case where the neutrino parameters correspond to the Mikheyev-Smirnov-Wolfenstein small mixing angle solution.

Original languageEnglish
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume64
Issue number9
DOIs
Publication statusPublished - Jan 1 2001

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grand unified theory
neutral currents
leptons
muons
neutrinos
magnetic moments
asymmetry
solar neutrinos
quarks
anomalies
operators

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Muon anomalous magnetic moment, lepton flavor violation, and flavor changing neutral current processes in supersymmetric grand unified theory with right-handed neutrinos",
abstract = "Motivated by the large mixing angle solutions for the atmospheric and solar neutrino anomalies, flavor changing neutral current processes and lepton flavor violating processes as well as the muon anomalous magnetic moment are analyzed in the framework of SU(5) supersymmetric grand unified theory (SUSY GUT) with right-handed neutrinos. In order to explain realistic mass relations for quarks and leptons, we take into account the effects of higher dimensional operators above the GUT scale. It is shown that the supersymmetric contributions to the (Formula presented) violation parameter in (Formula presented) mixing, (Formula presented) the (Formula presented) branching ratio, and the muon anomalous magnetic moment become large in a wide range of parameter space. We also investigate the correlations among these quantities. Within the current experimental bound of (Formula presented) large SUSY contributions are possible either in the muon anomalous magnetic moment or in (Formula presented) In the former case, the favorable value of the recent muon anomalous magnetic moment measurement at the BNL E821 experiment can be accommodated. In the latter case, the allowed region of the Kobayashi-Maskawa phase can be different from the prediction within the standard model (SM) and therefore measurements of the (Formula presented) asymmetry of the (Formula presented) mode and (Formula presented) could discriminate this case from the SM. We also show that the (Formula presented) branching ratio can be close to the current experimental upper bound and the mixing induced (Formula presented) asymmetry of the radiative B decay can be enhanced in the case where the neutrino parameters correspond to the Mikheyev-Smirnov-Wolfenstein small mixing angle solution.",
author = "Seungwon Baek and Toru Goto and Yasuhiro Okada and Okumura, {Ken ichi}",
year = "2001",
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T1 - Muon anomalous magnetic moment, lepton flavor violation, and flavor changing neutral current processes in supersymmetric grand unified theory with right-handed neutrinos

AU - Baek, Seungwon

AU - Goto, Toru

AU - Okada, Yasuhiro

AU - Okumura, Ken ichi

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N2 - Motivated by the large mixing angle solutions for the atmospheric and solar neutrino anomalies, flavor changing neutral current processes and lepton flavor violating processes as well as the muon anomalous magnetic moment are analyzed in the framework of SU(5) supersymmetric grand unified theory (SUSY GUT) with right-handed neutrinos. In order to explain realistic mass relations for quarks and leptons, we take into account the effects of higher dimensional operators above the GUT scale. It is shown that the supersymmetric contributions to the (Formula presented) violation parameter in (Formula presented) mixing, (Formula presented) the (Formula presented) branching ratio, and the muon anomalous magnetic moment become large in a wide range of parameter space. We also investigate the correlations among these quantities. Within the current experimental bound of (Formula presented) large SUSY contributions are possible either in the muon anomalous magnetic moment or in (Formula presented) In the former case, the favorable value of the recent muon anomalous magnetic moment measurement at the BNL E821 experiment can be accommodated. In the latter case, the allowed region of the Kobayashi-Maskawa phase can be different from the prediction within the standard model (SM) and therefore measurements of the (Formula presented) asymmetry of the (Formula presented) mode and (Formula presented) could discriminate this case from the SM. We also show that the (Formula presented) branching ratio can be close to the current experimental upper bound and the mixing induced (Formula presented) asymmetry of the radiative B decay can be enhanced in the case where the neutrino parameters correspond to the Mikheyev-Smirnov-Wolfenstein small mixing angle solution.

AB - Motivated by the large mixing angle solutions for the atmospheric and solar neutrino anomalies, flavor changing neutral current processes and lepton flavor violating processes as well as the muon anomalous magnetic moment are analyzed in the framework of SU(5) supersymmetric grand unified theory (SUSY GUT) with right-handed neutrinos. In order to explain realistic mass relations for quarks and leptons, we take into account the effects of higher dimensional operators above the GUT scale. It is shown that the supersymmetric contributions to the (Formula presented) violation parameter in (Formula presented) mixing, (Formula presented) the (Formula presented) branching ratio, and the muon anomalous magnetic moment become large in a wide range of parameter space. We also investigate the correlations among these quantities. Within the current experimental bound of (Formula presented) large SUSY contributions are possible either in the muon anomalous magnetic moment or in (Formula presented) In the former case, the favorable value of the recent muon anomalous magnetic moment measurement at the BNL E821 experiment can be accommodated. In the latter case, the allowed region of the Kobayashi-Maskawa phase can be different from the prediction within the standard model (SM) and therefore measurements of the (Formula presented) asymmetry of the (Formula presented) mode and (Formula presented) could discriminate this case from the SM. We also show that the (Formula presented) branching ratio can be close to the current experimental upper bound and the mixing induced (Formula presented) asymmetry of the radiative B decay can be enhanced in the case where the neutrino parameters correspond to the Mikheyev-Smirnov-Wolfenstein small mixing angle solution.

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