Neutrino mass from R-parity violation in split supersymmetry

Eung Jin Chun, Seong Chan Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)213-221
Number of pages9
JournalJournal of High Energy Physics
Issue number1
Publication statusPublished - 2005 Jan 1

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supersymmetry
parity
neutrinos
exchanging
solar neutrinos
diagrams
reactors
signatures
quarks
scalars
probes
decay
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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title = "Neutrino mass from R-parity violation in split supersymmetry",
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.",
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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 journalArticle

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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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