Abstract
AbstractA search for neutral Higgs bosons of the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is based on a sample of proton-proton collisions at a centre-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider. The data were recorded in 2011 and correspond to an integrated luminosity of 4.7 fb−1to 4.8 fb−1. Higgs boson decays into oppositely-charged muon orτlepton pairs are considered for final states requiring either the presence or absence ofb-jets. No statistically significant excess over the expected background is observed and exclusion limits at the 95% confidence level are derived. The exclusion limits are for the production cross-section of a generic neutral Higgs boson,ϕ, as a function of the Higgs boson mass and forh/A/Hproduction in the MSSM as a function of the parametersmAand tanβin the$ m_h^{\max } $scenario formAin the range of 90 GeV to 500 GeV.
Highlights
The ATLAS detectorThe ATLAS experiment at the LHC is a multi-purpose particle detector with a forwardbackward symmetric cylindrical geometry and nearly 4π coverage in solid angle [24]
Physical Higgs bosons, two of which are neutral and CP-even (h, H),1 one of which is neutral and CP-odd (A), and two of which are charged (H±)
The analysis is based on a sample of proton-proton collisions at a centre-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider
Summary
The ATLAS experiment at the LHC is a multi-purpose particle detector with a forwardbackward symmetric cylindrical geometry and nearly 4π coverage in solid angle [24]. It. consists of an inner tracking detector surrounded by a thin superconducting solenoid providing a 2 T axial magnetic field, electromagnetic and hadronic calorimeters, and a muon spectrometer. The inner tracking detector covers the pseudorapidity range |η| < 2.5.2 It consists of silicon pixel, semi-conductor micro-strip, and transition radiation tracking detectors. Lead/liquid-argon (LAr) sampling calorimeters provide electromagnetic (EM) energy measurements with high granularity. A hadronic (iron/scintillator-tile) calorimeter covers the central pseudorapidity range (|η| < 1.7). The end-cap and forward regions are instrumented with LAr calorimeters for both EM and hadronic energy measurements up to |η| = 4.9. The muon spectrometer surrounds the calorimeters and incorporates three large air-core toroid superconducting magnets with bending power between 2.0 Tm and 7.5 Tm, a system of precision tracking chambers and fast detectors for triggering. The trigger requirements were adjusted to changing data-taking conditions during 2011
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