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.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 66, No. 11, 01.01.2002.Research output: Contribution to journal › Article
}
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 -