### 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 language | English |
---|---|

Number of pages | 1 |

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

Volume | 64 |

Issue number | 9 |

DOIs | |

Publication status | Published - Jan 1 2001 |

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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*,

*64*(9). https://doi.org/10.1103/PhysRevD.64.095001

**Muon anomalous magnetic moment, lepton flavor violation, and flavor changing neutral current processes in supersymmetric grand unified theory with right-handed neutrinos.** / Baek, Seungwon; Goto, Toru; Okada, Yasuhiro; Okumura, Ken ichi.

Research output: Contribution to journal › Article

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 64, no. 9. https://doi.org/10.1103/PhysRevD.64.095001

}

TY - JOUR

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

PY - 2001/1/1

Y1 - 2001/1/1

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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U2 - 10.1103/PhysRevD.64.095001

DO - 10.1103/PhysRevD.64.095001

M3 - Article

AN - SCOPUS:85038268077

VL - 64

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

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

SN - 1550-7998

IS - 9

ER -