Abstract
We investigate how the observed neutrino data can be accommodated by R-parity violation in Split Supersymmetry. The atmospheric neutrino mass and mixing are explained by the bilinear parameters &xii, inducing the neutrino-neutralino mixing as in the usual low-energy supersymmetry. Among various one-loop corrections, only the quark-squark exchanging diagrams involving the order-one trilinear couplings λ′i23,i32 can generate the solar neutrino mass and mixing if the scalar mass ms is not larger than 109 GeV. This scheme requires an unpleasant hierarchical structure of the couplings, e.g. λi23,i32 ∼ 1, λ′i33 ≲ 104 and ξi ≲ 10-6. On the other hand, the model has a distinct collider signature of the lightest neutralino which can decay only to the final states, l2,W(*) and v/Z(*), arising from the bilinear mixing. Thus, the measurement of the ratio; Γ(eW(*)) : Γ(μW(* )): Γ(τW(*)) would provide a clean probe of the small reactor and large atmospheric neutrino mixing angles as far as the neutralino mass is larger than 62 GeV.
| Original language | English |
|---|---|
| Pages (from-to) | 213-221 |
| Number of pages | 9 |
| Journal | Journal of High Energy Physics |
| Issue number | 1 |
| Publication status | Published - 2005 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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Neutrino mass from R-parity violation in split supersymmetry. / Chun, Eung Jin; Park, Seong Chan.
In: Journal of High Energy Physics, No. 1, 01.01.2005, p. 213-221.Research output: Contribution to journal › Article
TY - JOUR
T1 - Neutrino mass from R-parity violation in split supersymmetry
AU - Chun, Eung Jin
AU - Park, Seong Chan
PY - 2005/1/1
Y1 - 2005/1/1
N2 - We investigate how the observed neutrino data can be accommodated by R-parity violation in Split Supersymmetry. The atmospheric neutrino mass and mixing are explained by the bilinear parameters &xii, inducing the neutrino-neutralino mixing as in the usual low-energy supersymmetry. Among various one-loop corrections, only the quark-squark exchanging diagrams involving the order-one trilinear couplings λ′i23,i32 can generate the solar neutrino mass and mixing if the scalar mass ms is not larger than 109 GeV. This scheme requires an unpleasant hierarchical structure of the couplings, e.g. λi23,i32 ∼ 1, λ′i33 ≲ 104 and ξi ≲ 10-6. On the other hand, the model has a distinct collider signature of the lightest neutralino which can decay only to the final states, l2,W(*) and v/Z(*), arising from the bilinear mixing. Thus, the measurement of the ratio; Γ(eW(*)) : Γ(μW(* )): Γ(τW(*)) would provide a clean probe of the small reactor and large atmospheric neutrino mixing angles as far as the neutralino mass is larger than 62 GeV.
AB - We investigate how the observed neutrino data can be accommodated by R-parity violation in Split Supersymmetry. The atmospheric neutrino mass and mixing are explained by the bilinear parameters &xii, inducing the neutrino-neutralino mixing as in the usual low-energy supersymmetry. Among various one-loop corrections, only the quark-squark exchanging diagrams involving the order-one trilinear couplings λ′i23,i32 can generate the solar neutrino mass and mixing if the scalar mass ms is not larger than 109 GeV. This scheme requires an unpleasant hierarchical structure of the couplings, e.g. λi23,i32 ∼ 1, λ′i33 ≲ 104 and ξi ≲ 10-6. On the other hand, the model has a distinct collider signature of the lightest neutralino which can decay only to the final states, l2,W(*) and v/Z(*), arising from the bilinear mixing. Thus, the measurement of the ratio; Γ(eW(*)) : Γ(μW(* )): Γ(τW(*)) would provide a clean probe of the small reactor and large atmospheric neutrino mixing angles as far as the neutralino mass is larger than 62 GeV.
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M3 - Article
AN - SCOPUS:27344442155
SP - 213
EP - 221
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 1
ER -