Search for charged Higgs bosons in the H ± → tb decay channel in pp collisions at √s=8 TeV using the ATLAS detector

Barton, Adam Edward and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Maddocks, Harvey and Muenstermann, Daniel Matthias Alfred and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2016) Search for charged Higgs bosons in the H ± → tb decay channel in pp collisions at √s=8 TeV using the ATLAS detector. Journal of High Energy Physics (3). ISSN 1029-8479

[img]
Preview
PDF (art%3A10.1007%2FJHEP03%282016%29127)
art_3A10.1007_2FJHEP03_282016_29127.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB)

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 √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).

Item Type: Journal Article
Journal or Publication Title: Journal of High Energy Physics
Additional Information: Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3.
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 79305
Deposited By: ep_importer_pure
Deposited On: 29 Apr 2016 14:04
Refereed?: Yes
Published?: Published
Last Modified: 15 Nov 2019 02:41
URI: https://eprints.lancs.ac.uk/id/eprint/79305

Actions (login required)

View Item View Item