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Search for charged Higgs bosons in the $H^pm ightarrow tb$ decay channel in $pp$ collisions at $sqrts=8 $ TeV using the ATLAS detector

The ATLAS collaboration
•
Aad G.
•
Abbott B.
altro
Zwalinski L.
2016
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
Abstract
Charged Higgs bosons heavier than the top quark and decaying via H-+/- -> tb are searched for in proton-proton collisions measured with the ATLAS experiment at root s = 8 TeV corresponding to an integrated luminosity of 20.3 fb(-1). The production of a charged Higgs boson in association with a top quark, gb -> tH(+/-), is explored in the mass range 200 to 600 GeV using multi-jet final states with one electron or muon. In order to separate the signal from the Standard Model background, analysis techniques combining several kinematic variables are employed. An excess of events above the background only hypothesis is observed across a wide mass range, amounting to up to 2.4 standard deviations. Upper limits are set on the gb -> tH(+/-) production cross section times the branching fraction BR(H-+/- -> tb). Additionally, the complementary s-channel production, qq' -> H-+/-, is investigated through a reinterpretation of W' -> tb searches in ATLAS. Final states with one electron or muon are relevant for H-+/- masses from 0.4 to 2.0 TeV, whereas the all-hadronic final state covers the range 1.5 to 3.0 TeV. In these search channels, no significant excesses from the predictions of the Standard Model are observed, and upper limits are placed on the qq' -> H-+/- production cross section times the branching fraction BR(H-+/- -> tb).
DOI
10.1007/JHEP03(2016)127
WOS
WOS:000373133100001
Archivio
http://hdl.handle.net/11390/1095200
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84961612855
Diritti
metadata only access
Web of Science© citazioni
80
Data di acquisizione
Mar 25, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
Vedi dettagli
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