Journal article
Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV
Physics Letters B 736: 371-397 (2014), Vol.736(C), pp.371-397
01/01/2014
DOI: 10.1016/j.physletb.2014.07.053
Abstract
A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton-proton collisions at s=8 TeV collected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5 fb-1. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate t~2 decaying to a lighter top-squark mass eigenstate t~1 via either t~2→Ht~1 or t~2→Zt~1, followed in both cases by t~1→tχ~10, where χ~10 is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between the t~1 and χ~10 states is approximately equal to the top-quark mass (mt~1-mχ~10≃mt), which is not probed by searches for direct t~1 squark pair production. The analysis excludes top squarks with masses mt~2<575 GeV and mt~1<400 GeV at a 95% confidence level. © 2014 The Authors.
Details
- Title: Subtitle
- Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV
- Creators
- J. A Brochero CifuentesI. J CabrilloAlicia CalderonS. H ChuangJ Duarte CampderrosM FernándezG GómezJ González SánchezA GrazianoA López VirtoJesús MarcoRafael MarcoCelso Martínez-RiveroFrancisco MatorrasF. J Muñoz SánchezJonatan PiedraTeresa RodrigoAna Y Rodríguez MarreroAlberto Ruiz JimenoLuca ScodellaroIván VilaRocío VilarCMS Collaboration
- Contributors
- Y Onel (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physics Letters B 736: 371-397 (2014), Vol.736(C), pp.371-397
- DOI
- 10.1016/j.physletb.2014.07.053
- ISSN
- 0370-2693
- eISSN
- 1873-2445
- Publisher
- Elsevier
- Grant note
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- Language
- English
- Date published
- 01/01/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199956302771
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