Tau-sneutrino next-to-lightest supersymmetric particle and multilepton signatures at the LHC

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.075016· OSTI ID:21432326

Figy, Terrance ^[1]; Rolbiecki, Krzysztof ^[2]; Santoso, Yudi ^[3]

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1. TH Division, CERN, Geneva (Switzerland)
2. Institute for Particle Physics Phenomenology, Durham University, Durham DH1 3LE (United Kingdom)
3. Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045-7582 (United States)

In models with gravitino as the lightest supersymmetric particle (LSP), the next-to-lightest supersymmetric particle (NLSP) can have a long lifetime and appear stable in collider experiments. We study the leptonic signatures of such a scenario with tau sneutrino as the NLSP, which is realized in the non-universal Higgs masses (NUHM) scenario. We focus on an interesting trilepton signature with two like-sign taus and an electron or a muon of the opposite sign. The neutralinos and charginos are quite heavy in the model considered, and the trilepton signal comes mostly from the slepton-sneutrino production. We identify the relevant backgrounds, taking into account tau decays, and devise a set of cuts to optimize this trilepton signal. We simulate signal and backgrounds at the Large Hadron Collider (LHC) with 14 TeV center-of-mass energy. Although the sleptons in this model are relatively light, O(100 GeV), discovery is more demanding compared to typical neutralino LSP scenarios. The trilepton signal requires a large amount of accumulated data, at least {approx}80 fb{sup -1}, at the center-of-mass (c.m.) energy of 14 TeV.

• OSTI ID: 21432326
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 7; Other Information: DOI: 10.1103/PhysRevD.82.075016; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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GEV RANGE 100-1000
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LIFETIME
MASS
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PARTICLE DECAY
SPARTICLES
SUPERSYMMETRY
TEV RANGE 10-100
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