4.7 Article

GeV Majorana neutrinos in top-quark decay at the LHC

Journal

PHYSICAL REVIEW D
Volume 79, Issue 1, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.79.014034

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Funding

  1. U. S. Department of Energy [DE-FG0295ER40896]
  2. Wisconsin Alumni Research Foundation
  3. World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan

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We explore the Delta L = 2 same-sign dilepton signal from top-quark decay via a Majorana neutrino at the LHC in the top anti-top pair production samples. The signature is same-sign dilepton plus multijets with no significant missing energy. The most optimistic region lies where the Majorana neutrino mass is between 15-65 GeV. For 300 fb(-1) integrated luminosity, it is possible to probe S-ij, the effective mixing parameter, to O(10(-5)).

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