Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector

Abstract

A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 5.4 fb${}^{-1}$ of proton-proton collisions data at $\sqrt{s}=7$ TeV and 20.3 fb${}^{-1}$ at $\sqrt{s}=8$ TeV collected by the ATLAS detector at the Large Hadron Collider. The number of observed Higgs boson decays to diphotons divided by the corresponding Standard Model prediction, called the signal strength, is found to be $\mu =1.17\pm 0.27$ at the value of the Higgs boson mass measured by ATLAS, $m_H$ = 125.4 GeV. The analysis is optimized to measure the signal strengths for individual Higgs boson production processes at this value of $m_H$. They are found to be ${\mu }_{\mathrm{ggF}}=1.32\pm 0.38$, ${\mu }_{\mathrm{VBF}}=0.8\pm 0.7$, ${\mu }_{WH}=1.0\pm 1.6$, ${\mu }_{ZH}=0.1_{-0.1}^{+3.7}$, ${\mu }_{t\bar{t}H}=1.6_{-1.8}^{+2.7}$, for Higgs boson production through gluon fusion, vector-boson fusion, and in association with a $W$ or $Z$ boson or a top-quark pair, respectively. Compared with the previously published ATLAS analysis, the results reported here also benefit from a new energy calibration procedure for photons and the subsequent reduction of the systematic uncertainty on the diphoton mass resolution. No significant deviations from the predictions of the Standard Model are found.

32 pages plus author list + cover pages (46 pages total), 21 figures, 14 tables, submitted to Physical Review D. References updated. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-08/

References in corpus (21)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• Pileup subtraction using jet areas
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• VBFNLO: A parton level Monte Carlo for processes with electroweak bosons
• Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Strong and electroweak corrections to the production of Higgs+2jets via weak interactions at the LHC
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data
• Measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ channels with the ATLAS detector using 25 fb${}^{-1}$ of $pp$ collision data
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton-proton collision data
• Next-to-Leading order Higgs + 2 jet production via gluon fusion
• Combined search for the Standard Model Higgs boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at $\sqrt{s}=8$ TeV with ATLAS

Cited by in corpus (54)

• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• Higgs boson gluon-fusion production in N3LO QCD
• A second Higgs from the Higgs portal
• Search for new phenomena in high-mass diphoton final states using 37 fb${}^{-1}$ of proton-proton collisions collected at $\sqrt{s}=13$ TeV with the ATLAS detector
• Higgs production in association with a top-antitop pair in the Standard Model Effective Field Theory at NLO in QCD
• A light pseudoscalar of 2HDM confronted with muon g-2 and experimental constraints
• Exploring collider signatures of the inert Higgs doublet model
• Higgs $\to$ $\mu \tau$ as an indication for $S_4$ flavor symmetry
• LHC Phenomenology of Type II Seesaw: Nondegenerate Case
• Post-ACME2013 CP-violation in Higgs Physics and Electroweak Baryogenesis
• Nondecoupling of charged scalars in Higgs decay to two photons and symmetries of the scalar potential
• A light NMSSM pseudoscalar Higgs boson at the LHC redux
• Dark matter, neutrino masses and high scale validity of an inert Higgs doublet model
• Search for heavy resonances decaying to a $Z$ boson and a photon in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Higgs pair productions in the CP-violating two-Higgs-doublet model
• NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
• Search for top quark decays $t\to qH$, with $H\to \gamma \gamma$, in $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Probing the $\mu \nu$SSM with light scalars, pseudoscalars and neutralinos from the decay of a SM-like Higgs boson at the LHC
• The role of MSSM heavy Higgs production in the self coupling measurement of the 125 GeV Higgs boson at the LHC
• Neutrino mass and invisible Higgs decays at the LHC
• Electroweak corrections to diphoton plus jets
• Effective Interaction of Electroweak-Interacting Dark Matter with Higgs Boson and Its Phenomenology
• Higgs Boson Plus Dijets: Higher Order Corrections
• Charged Higgs boson in the $W^{\pm }$ Higgs channel at the Large Hadron Collider
• Constraining Inert Triplet Dark Matter by the LHC and FermiLAT
• Tau flavored dark matter and its impact on tau Yukawa coupling
• GUT-Inspired Supersymmetric Model for h\rightarrow γγand Muon g-2
• Charged Lepton Flavor Violating Processes and Scalar Leptoquark Decay Branching Ratios in the Colored Zee-Babu Model
• Interference effects in the $H(\to \gamma \gamma )+2$ jets channel at the LHC
• Probing the NMSSM via Higgs boson signatures from stop cascade decays at the LHC
• Kinematical correlations for Higgs boson plus High Pt Jet Production at Hadron Colliders
• Vacuum stability bounds on Higgs coupling deviations
• Implication of Quadratic Divergences Cancellation in the Two Higgs Doublet Model
• Higgs boson couplings: measurements and theoretical interpretation
• Study of Higgs-gauge boson anomalous couplings through $e^{-}{e}^{+}\to W^{-}{W}^{+}H$ at ILC
• Probing Radiative Neutrino Mass Generation through Monotop Production
• Diphoton resonance confronts dark matter
• Searching for degenerate Higgs bosons - A profile likelihood ratio method to test for mass-degenerate states in the presence of incomplete data and uncertainties
• Lepton flavor violating Higgs decay at $e^{+}{e}^{-}$ colliders
• Higgs-Precision Constraints on Colored Naturalness
• Predictions for the isolated prompt photon production at the LHC at $\sqrt{s}=$13 TeV
• The Hunt for the Rest of the Higgs Bosons
• Higgs couplings and BSM physics: Run I Legacy constraints
• Impact of additional bosons on the exploration of the Higgs boson at the LHC
• Constraints on vector resonances from a strong Higgs sector
• Flavor from the Electroweak Scale
• Stability constraints in triplet extension of MSSM
• $HZ\gamma$ production at $14\mathrm{TeV}$ LHC in next-to-leading order QCD
• Higgs Effective Field Theories - Systematics and Applications
• Constraining dark matter in the LRTH model with latest LHC, XENON100 and LUX data
• $\mathcal{O}$(1) GeV dark matter in SUSY and a very light pseudoscalar at the LHC
• Searches for ttH (Multilepton+Diphoton) Production in ATLAS
• The Higgs-like boson spin from the center-edge asymmetry in the diphoton channel