Search for the standard model Higgs boson produced in association with a top-quark pair in pp collisions at the LHC
Abstract
A search for the standard model Higgs boson produced in association with a top-quark pair is presented using data samples corresponding to an integrated luminosity of 5.0 fb−1 (5.1 fb−1) collected in pp collisions at the center-of-mass energy of 7 TeV (8 TeV). Events are considered where the top-quark pair decays to either one lepton+jets (tt¯→ℓνqq¯¯¯′bb¯¯¯) or dileptons (tt¯→ℓ+νℓ−ν¯¯¯bb¯¯¯), ℓ being an electron or a muon. The search is optimized for the decay mode H→bb¯¯¯. The largest background to the tt¯H signal is top-quark pair production with additional jets. Artificial neural networks are used to discriminate between signal and background events. Combining the results from the 7 TeV and 8 TeV samples, the observed (expected) limit on the cross section for Higgs boson production in association with top-quark pairs for a Higgs boson mass of 125 GeV is 5.8 (5.2) times the standard model expectation. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000074536Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Journal of High Energy PhysicsBand
Seiten / Artikelnummer
Verlag
SpringerThema
Hadron-Hadron Scattering; Higgs physicsOrganisationseinheit
03381 - Pauss, Felicitas (emeritus)
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)