### Abstract

We reanalyze the constraints imposed on lepton-number violating interactions by radiative contributions to neutrino masses at the one- and two-loop levels in supersymmetric models without R parity. The interactions considered are the (Formula presented) superpotential operators (Formula presented) and (Formula presented) and the (Formula presented) soft terms (Formula presented) and (Formula presented) The two-loop contributions analyzed are those induced by the radiatively generated mass splitting between the (Formula presented)-even and (Formula presented)-odd sneutrino states. It is shown how the constraints on the couplings (Formula presented) and (Formula presented) coming from the one-loop analysis can be evaded. In such a case, the two-loop contributions to neutrino masses become important. The combined one- and two-loop analysis yields constraints on the couplings (Formula presented) and (Formula presented) that are rather difficult to escape. The two-loop analysis yields also constraints on (Formula presented) and (Formula presented) which are not bounded at the one-loop level. More freedom remains for the couplings (Formula presented) (Formula presented) and (Formula presented) (Formula presented) when j and k are first- or second-generation indices.

Original language | English |
---|---|

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

Volume | 66 |

Issue number | 11 |

DOIs | |

Publication status | Published - 2002 Jan 1 |

Externally published | Yes |

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### ASJC Scopus subject areas

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

### Cite this

**Novel constraints on [Formula Presented] interactions from neutrino masses.** / Borzumati, Francesca; Lee, Jae Sik.

Research output: Contribution to journal › Article

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TY - JOUR

T1 - Novel constraints on [Formula Presented] interactions from neutrino masses

AU - Borzumati, Francesca

AU - Lee, Jae Sik

PY - 2002/1/1

Y1 - 2002/1/1

N2 - We reanalyze the constraints imposed on lepton-number violating interactions by radiative contributions to neutrino masses at the one- and two-loop levels in supersymmetric models without R parity. The interactions considered are the (Formula presented) superpotential operators (Formula presented) and (Formula presented) and the (Formula presented) soft terms (Formula presented) and (Formula presented) The two-loop contributions analyzed are those induced by the radiatively generated mass splitting between the (Formula presented)-even and (Formula presented)-odd sneutrino states. It is shown how the constraints on the couplings (Formula presented) and (Formula presented) coming from the one-loop analysis can be evaded. In such a case, the two-loop contributions to neutrino masses become important. The combined one- and two-loop analysis yields constraints on the couplings (Formula presented) and (Formula presented) that are rather difficult to escape. The two-loop analysis yields also constraints on (Formula presented) and (Formula presented) which are not bounded at the one-loop level. More freedom remains for the couplings (Formula presented) (Formula presented) and (Formula presented) (Formula presented) when j and k are first- or second-generation indices.

AB - We reanalyze the constraints imposed on lepton-number violating interactions by radiative contributions to neutrino masses at the one- and two-loop levels in supersymmetric models without R parity. The interactions considered are the (Formula presented) superpotential operators (Formula presented) and (Formula presented) and the (Formula presented) soft terms (Formula presented) and (Formula presented) The two-loop contributions analyzed are those induced by the radiatively generated mass splitting between the (Formula presented)-even and (Formula presented)-odd sneutrino states. It is shown how the constraints on the couplings (Formula presented) and (Formula presented) coming from the one-loop analysis can be evaded. In such a case, the two-loop contributions to neutrino masses become important. The combined one- and two-loop analysis yields constraints on the couplings (Formula presented) and (Formula presented) that are rather difficult to escape. The two-loop analysis yields also constraints on (Formula presented) and (Formula presented) which are not bounded at the one-loop level. More freedom remains for the couplings (Formula presented) (Formula presented) and (Formula presented) (Formula presented) when j and k are first- or second-generation indices.

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U2 - 10.1103/PhysRevD.66.115012

DO - 10.1103/PhysRevD.66.115012

M3 - Article

VL - 66

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 11

ER -