CERN Accelerating science

ATLAS Note
Report number	ATLAS-CONF-2012-011
Title	Search for charged Higgs bosons decaying via H+ -> tau nu in ttbar events using 4.6 fb−1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector
Corporate Author(s)	The ATLAS collaboration
Publication	2012
Collaboration	ATLAS Collaboration
Imprint	07 Mar 2012
Number of pages	mult.
Note	All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2012-011
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	charged ; Higgs ; boson ; tau ; neutrino ; combined ; MSSM ; SUSY ; 2HDM
Abstract	The results of a search for charged Higgs bosons are presented. The analysis is based on 4.6/fb of proton-proton ($pp$) collision data at $\sqrt{s}=7$ TeV collected by the ATLAS experiment at the Large Hadron Collider, using $t\bar{t}$ events with a $\tau$ lepton in the final state. The data are consistent with the expected background from Standard Model processes. Assuming that the branching fraction ${\cal B}(H^{\pm} \rightarrow \tau\nu)$ is 100%, this leads to upper limits on ${\cal B}(t \rightarrow bH^{+})$ between 5% and 1% for charged Higgs boson masses $(m_{H^+})$ ranging from 90 to 160 GeV, respectively. In the context of the $m_h^{\text{max}}$ scenario of the MSSM, values of $\tan\beta$ larger than 13-26 are excluded for charged Higgs boson masses in the range $90 \mbox{GeV} < m_{H^+} < 150 \mbox{GeV}$.
Copyright/License	Preprint: (License: CC-BY-4.0)

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