4.7 Article

Search strategy for gluinos at the LHC with a Higgs boson decaying into tau leptons

Journal

EUROPEAN PHYSICAL JOURNAL C
Volume 82, Issue 10, Pages -

Publisher

SPRINGER
DOI: 10.1140/epjc/s10052-022-10951-4

Keywords

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Funding

  1. Atraccion de Talento program (Modalidad 1) of the Comunidad de Madrid (Spain) [2019-T1/TIC-14019]
  2. Spanish Research Agency (Agencia Estatal de Investigacion) through the grant IFT Centro de Excelencia Severo Ochoa [SEV-2016-0597]
  3. CONICET
  4. ANPCyT [PICT 2016-0164, PICT 2017-2751, PICT 2017-2765]
  5. National Science Foundation [PHY-1820860]
  6. Spanish MINEICO [FPA2017-88915-P]
  7. Catalan Government [2017SGR1069]
  8. Severo Ochoa Excellence Program of MINEICO [SEV-2016-0588]
  9. CERCA program of the Generalitat de Catalunya

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This study proposes a search strategy for gluinos with r leptons in the final state at the LHC. The results demonstrate the sensitivity of the search strategy and provide projections for higher luminosity experiments.
The possibility in supersymmetric scenarios that the dark matter candidate is a Higgsino-like neutralino means that its production can be associated with Higgs bosons. Taking advantage of this fact, we propose a LHC search strategy for gluinos with r leptons in the final state, coming from the decay of a Higgs boson. We consider the strong production of a pair of gluinos, one of which decays into the Higgsino plus jets while the other decays into the bino plus jets. In turn, this bino decays into the Higgsino plus a Higgs boson which finally decays into a tau-lepton pair. Therefore, the experimental signature under study consists of 4 jets, 2 tau leptons, and a large amount of missing transverse energy. This work represents a proof of principle of a search that is sensitive to a spectrum such that the gluino does not directly decay to the dark matter candidate but to an intermediate electroweakino that then produces Higgs bosons in its subsequent decay. Our cut-based search strategy allows us to reach, for a LHC center-of-mass energy of 14 TeV and a total integrated luminosity of 1 ab(-1), significances of up to 2 standard deviations, considering systematic uncertainties in the SM background of 30%. The projections for 3 ab(-1) are encouraging, with significances at the evidence level, which in more optimistic experimental scenarios could exceed 4 standard deviations.

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