Search for charged Higgs bosons in the $H^{\pm} \rightarrow tb$ decay channel in $pp$ collisions at $\sqrt{s}=8 $ TeV using the ATLAS detector

Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdinov, Ovsat; Aben, Rosemarie; Abolins, Maris; AbouZeid, Ossama; Abramowicz, Halina; Abreu, Henso; Abreu, Ricardo

doi:10.1007/JHEP03(2016)127

Search for charged Higgs bosons in the $H^{\pm} \rightarrow tb$ decay channel in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector

ATLAS

Collaboration

Dec 11, 2015

48 pages

Published in:

JHEP 03 (2016) 127

Published: Mar 17, 2016

e-Print:

1512.03704 [hep-ex]

DOI:

10.1007/JHEP03(2016)127

PDG:

{{\mathit H}^{\pm}}

(charged Higgs) mass limits for m_{{{\mathit H}^{+}}}< m(top)

Report number:

CERN-PH-EP-2015-290

Experiments:

CERN-LHC-ATLAS

View in:

reference search152 citations

Citations per year

Abstract: (Springer)

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

\sqrt{s}=8

TeV corresponding to an integrated luminosity of 20.3fb

^{−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).

Note:

32 pages plus author list (48 pages total), 10 figures, 4 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-28/

Hadron-Hadron scattering
Higgs physics
p p: scattering
p p: colliding beams
Higgs particle: associated production
Higgs particle: charged particle: search for
Higgs particle: hadronic decay
gauge boson: massive
W'
ATLAS

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Search for charged Higgs bosons in the H±→tbH^{\pm} \rightarrow tbH±→tb decay channel in pppppp collisions at s=8\sqrt{s}=8 s​=8 TeV using the ATLAS detector

Citations per year

Search for charged Higgs bosons in the $H^{\pm} \rightarrow tb$ decay channel in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector