Search for Heavy Higgs Bosons $A/H$ Decaying to a Top Quark Pair in $pp$ Collisions at $sqrt{s}=8 ext{ } ext{ }mathrm{TeV}$ with the ATLAS Detector
Yükleniyor...
Dosyalar
Tarih
2017-11-10
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer. Physical Soc.
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
A search for heavy pseudoscalar (A) and scalar (H) Higgs bosons decaying into a top quark pair (tt¯) has been performed with 20.3??fb-1 of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy s=8??TeV. Interference effects between the signal process and standard model tt¯ production, which are expected to distort the signal shape from a single peak to a peak-dip structure, are taken into account. No significant deviation from the standard model prediction is observed in the tt¯ invariant mass spectrum in final states with an electron or muon, large missing transverse momentum, and at least four jets. The results are interpreted within the context of a type-II two-Higgs-doublet model. Exclusion limits on the signal strength are derived as a function of the mass mA/H and the ratio of the vacuum expectation values of the two Higgs fields, tan?, for mA/H>500??GeV.
Açıklama
Anahtar Kelimeler
p p: colliding beams, top: pair production, Higgs particle: heavy, Higgs particle: hadronic decay, interference: effect, transverse momentum: missing-energy, p p: scattering, ATLAS, CERN LHC Coll, mass spectrum: (2top), Higgs particle: pseudoscalar particle, structure, supersymmetry: parameter space, mass dependence, final state: ((n)jet lepton), Higgs particle: doublet, experimental results, 8000 GeV-cms
Kaynak
Physical Review Letters
WoS Q Değeri
Q1
