Stop and sbottom LSP with R -parity violation

Eung Jin Chun, Sunghoon Jung, Hyun Min Lee, Seong Chan Park

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Considering a third-generation squark as the lightest supersymmetric particle (LSP), we investigate R-parity violating collider signatures with bilinear LH or trilinear LQD operators that may contribute to observed neutrino masses and mixings. Reinterpreting various LHC 7+8TeV results of supersymmetry and leptoquark searches, we find that third-generation squark LSPs decaying to first- or second-generation leptons are generally excluded up to at least about 660 GeV at 95% C.L. One notable feature of sbottom LSP models, as opposed to stop LSP models, is that sbottoms can decay to top quarks leading to a broader invariant mass spectrum and weaker constraints in current collider searches. More dedicated searches with b-taggings or top reconstructions are thus encouraged. Finally, we discuss that the recently observed excesses in the CMS leptoquark search can be accommodated by decays of mostly left-handed sbottom LSPs in the LQD113+131 model.

Original languageEnglish
Article number115023
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number11
DOIs
Publication statusPublished - 2014 Dec 1

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parity
decay
mass spectra
marking
supersymmetry
leptons
neutrinos
signatures
quarks
operators

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Stop and sbottom LSP with R -parity violation",
abstract = "Considering a third-generation squark as the lightest supersymmetric particle (LSP), we investigate R-parity violating collider signatures with bilinear LH or trilinear LQD operators that may contribute to observed neutrino masses and mixings. Reinterpreting various LHC 7+8TeV results of supersymmetry and leptoquark searches, we find that third-generation squark LSPs decaying to first- or second-generation leptons are generally excluded up to at least about 660 GeV at 95{\%} C.L. One notable feature of sbottom LSP models, as opposed to stop LSP models, is that sbottoms can decay to top quarks leading to a broader invariant mass spectrum and weaker constraints in current collider searches. More dedicated searches with b-taggings or top reconstructions are thus encouraged. Finally, we discuss that the recently observed excesses in the CMS leptoquark search can be accommodated by decays of mostly left-handed sbottom LSPs in the LQD113+131 model.",
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Stop and sbottom LSP with R -parity violation. / Chun, Eung Jin; Jung, Sunghoon; Lee, Hyun Min; Park, Seong Chan.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 90, No. 11, 115023, 01.12.2014.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Chun, Eung Jin

AU - Jung, Sunghoon

AU - Lee, Hyun Min

AU - Park, Seong Chan

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AB - Considering a third-generation squark as the lightest supersymmetric particle (LSP), we investigate R-parity violating collider signatures with bilinear LH or trilinear LQD operators that may contribute to observed neutrino masses and mixings. Reinterpreting various LHC 7+8TeV results of supersymmetry and leptoquark searches, we find that third-generation squark LSPs decaying to first- or second-generation leptons are generally excluded up to at least about 660 GeV at 95% C.L. One notable feature of sbottom LSP models, as opposed to stop LSP models, is that sbottoms can decay to top quarks leading to a broader invariant mass spectrum and weaker constraints in current collider searches. More dedicated searches with b-taggings or top reconstructions are thus encouraged. Finally, we discuss that the recently observed excesses in the CMS leptoquark search can be accommodated by decays of mostly left-handed sbottom LSPs in the LQD113+131 model.

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