## Abstract

The G-parity irregular induced tensor form factor in the weak nucleon axial vector current has been precisely determined by measuring the alignment correlation terms in the β-ray angular distributions of the purely spin aligned mirror pair ^{12}B and ^{12}N. The coefficient of the induced tensor term was determined to be 2M f_{T}/f_{A} = -0.21 ± 0.09 (stat.) ± 0.07 (syst.) ± 0.05 (theory) at a 90% confidence level. The previously obtained data in the year 1996 was reanalyzed to be added to the present result. The combined result is 2Mf_{T} / f_{A} = -0.15 ± 0.12 ± 0.05 (theory) at a 90% confidence level. The obtained induced tensor coefficient is vanishingly small. In order to derive these numerical values from the experimental data the weak magnetism and axial charge, and also their charge dependence should be known. Theoretical investigation on these quantities is clearly described. Also we set constraints on the Kubodera-Delorme-Rho parameters from the present result together with the results of correlation-type experiments in the mass A = 8 and 20 systems as ζ = - (0.12 ± 0.14) × 10^{-3} MeV^{-1} and λ = + (0.30 ± 0.88) × 10^{-3} in the 1 σ level.

Original language | English |
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Title of host publication | Beyond the Desert 2002 |

Subtitle of host publication | Accelerator, Non-Accelerator and Space Approaches in the New Millennium - Proceedings of the 3rd International Conference on Particle Physics Beyond the Standard Model |

Editors | H.V. Klapdor-Kleingrothaus |

Pages | 695-700 |

Number of pages | 6 |

Publication status | Published - 2003 Dec 1 |

Event | Beyond the Desert 2002: Accelerator, Non-Accelerator and Space Approaches in the New Millennium - Proceedings of the 3rd International Conference on Particle Physics Beyond the Standard Model: Accelerator, Non-Accelerator and Space Approaches - Oulu, Finland Duration: 2002 Jul 2 → 2002 Jul 7 |

### Publication series

Name | Beyond the Desert 2002: Accelerator, Non-Accelerator and Space APproaches in the New Millenium - Proceedings of the 3rd International Conference on Particle Physics Beyond the Standard Model |
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### Conference

Conference | Beyond the Desert 2002: Accelerator, Non-Accelerator and Space Approaches in the New Millennium - Proceedings of the 3rd International Conference on Particle Physics Beyond the Standard Model: Accelerator, Non-Accelerator and Space Approaches |
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Country/Territory | Finland |

City | Oulu |

Period | 02/7/2 → 02/7/7 |

## ASJC Scopus subject areas

- Engineering(all)

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