Cross-section measurements of the Higgs boson decaying into a pair of tau-leptons in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

A measurement of production cross sections of the Higgs boson in proton-proton collisions is presented in the $H\to \tau \tau$ decay channel. The analysis is performed using $36.1{\mathrm{fb}}^{-1}$ of data recorded by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy of $\sqrt{s}=13$ TeV. All combinations of leptonic ($\tau \to l\nu \bar{\nu }$ with $l=e$, $\mu$) and hadronic ($\tau \to \mathrm{hadrons}\nu$) tau decays are considered. The $H\to \tau \tau$ signal over the expected background from other Standard Model processes is established with an observed (expected) significance of 4.4 (4.1) standard deviations. Combined with results obtained using data taken at 7 and 8 TeV center-of-mass energies, the observed (expected) significance amounts to 6.4 (5.4) standard deviations and constitutes an observation of $H\to \tau \tau$ decays. Using the data taken at $\sqrt{s}=13$ TeV, the total cross section in the $H\to \tau \tau$ decay channel is measured to be $3.77_{-0.59}^{+0.60}{(stat.)}_{-0.74}^{+0.87}(syst.)\mathrm{pb}$, for a Higgs boson of mass 125 GeV assuming the relative contributions of its production modes as predicted by the Standard Model. Total cross sections in the $H\to \tau \tau$ decay channel are determined separately for vector-boson-fusion production and gluon-gluon-fusion production to be $0.28\pm 0.09{(stat.)}_{-0.09}^{+0.11}(syst.)\mathrm{pb}$ and $3.1\pm 1.0{(stat.)}_{-1.3}^{+1.6}(syst.)\mathrm{pb}$, respectively. Similarly, results of a fit are reported in the framework of simplified template cross sections. All measurements are in agreement with Standard Model expectations.

58 pages in total, author list starting page 42, 13 figures (2 of those in the Appendix), 11 tables, submitted to Phys. Rev. D. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2017-07/

References in corpus (26)

• 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
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• 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
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Higgs boson gluon-fusion production in N3LO QCD
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Strong and electroweak corrections to the production of Higgs+2jets via weak interactions at the LHC
• Observation of Higgs boson decay to bottom quarks
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• Observation of $H\to b\bar{b}$ decays and $VH$ production with the ATLAS detector
• Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
• QCD NLO and EW NLO corrections to $t\bar{t}H$ production with top quark decays at hadron collider
• Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment in $pp$ collisions at $\sqrt{s}$=8 TeV

Cited by in corpus (74)

• Combined measurements of Higgs boson production and decay using up to $80$ fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• Evidence for Higgs boson decay to a pair of muons
• Higgs boson potential at colliders: status and perspectives
• Measurements of $WH$ and $ZH$ production in the $H\to b\bar{b}$ decay channel in $pp$ collisions at 13 TeV with the ATLAS detector
• Measurements of Higgs boson production cross sections and couplings in the diphoton decay channel at $\sqrt{s}=$ 13 TeV
• Constraining new physics from Higgs measurements with Lilith: update to LHC Run 2 results
• Search for the Higgs boson decays $H\to ee$ and $H\to e\mu$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurements of the Higgs boson inclusive and differential fiducial cross sections in the 4$\ell$ decay channel at $\sqrt{s}$ = 13 TeV
• Identification of hadronic tau lepton decays using a deep neural network
• Multistep Strongly First Order Phase Transitions from New Fermions at the TeV Scale
• New features in the JHU generator framework: constraining Higgs boson properties from on-shell and off-shell production
• Test of CP invariance in vector-boson fusion production of the Higgs boson in the $H\to \tau \tau$ channel in proton$-$proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Higgs bosons with large couplings to light quarks
• Searches for lepton-flavour-violating decays of the Higgs boson in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
• Simplified Template Cross Sections -- Stage 1.1 and 1.2
• Constraining the CP structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis
• Towards testing the magnetic moment of the tau at one part per million
• Indirect $\mathcal{C}\mathcal{P}$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities
• Rare Top Decays as Probes of Flavorful Higgs Bosons
• CDF $W$ boson mass and muon $g-2$ in type-X two-Higgs-doublet model with a Higgs-phobic light pseudoscalar
• Probing a Scalar Singlet-Catalyzed Electroweak Phase Transition with Resonant Di-Higgs Production in the $4b$ Channel
• What is Leading Order for LFV in SMEFT?
• Higgs decay into a lepton pair and a photon revisited
• Measurements of Higgs boson production in the decay channel with a pair of $\tau$ leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• A 95 GeV Higgs Boson in the Georgi-Machacek Model
• Introduction to Charged Lepton Flavour Violation
• The Higgs boson -- its implications and prospects for future discoveries
• Search for Higgs boson decays into a $Z$ boson and a light hadronically decaying resonance using 13 TeV $pp$ collision data from the ATLAS detector
• Probing the strange Higgs coupling at lepton colliders using light-jet flavor tagging
• Comprehensive study of the light charged Higgs boson in the type-I two-Higgs-doublet model
• Reducing the dependence of the neural network function to systematic uncertainties in the input space
• Measurement of the $CP$ properties of Higgs boson interactions with $\tau$-leptons with the ATLAS detector
• Signature of 2HDM at Higgs Factories
• Search for decays of the 125 GeV Higgs boson into a Z boson and a $\rho$ or $\varphi$ meson
• Measurement of the inclusive and differential Higgs boson production cross sections in the decay mode to a pair of $\tau$ leptons in pp collisions at $\sqrt{s}$ = 13 TeV
• Charm-quark Yukawa Coupling in $h\to c\bar{c}\gamma$ at LHC
• CP-violating Higgs Di-tau Decays: Baryogenesis and Higgs Factories
• Constraints on Higgs boson production with large transverse momentum using $H\to b\bar{b}$ decays in the ATLAS detector
• The Natural TeV Cutoff of the Higgs Field from the Multiplicative Lagrangian
• Following the trail of new physics via VBF Higgs signal at the Large Hadron Collider
• Heterogeneous Graph Neural Network for Identifying Hadronically Decayed Tau Leptons at the High Luminosity LHC
• Comparing Point Cloud Strategies for Collider Event Classification
• Flavor changing top decays to charm and Higgs with $\tau \tau$ at the LHC
• Doubly Blind Spots in Scalar Dark Matter Models
• Perspectives and Outlook from HEP Window on the Universe
• Higgs to charm quarks in vector boson fusion plus a photon
• Probing the trilinear Higgs boson self-coupling via single Higgs production at the LHeC
• A New Left-Right Symmetry Model
• Machine learning classification: case of Higgs boson CP state in H to tau tau decay at LHC
• Reconstruction of $\tau$ lepton pair invariant mass using an artificial neural network
• Probe Charm Yukawa at the future $e^{-}p$ and $e^{+}{e}^{-}$ colliders
• Disentangling the high and low cutoff scales via the trilinear Higgs couplings in the type-I two-Higgs-doublet model
• Two-loop amplitudes for di-Higgs and di-pseudo-Higgs productions through quark annihilation in QCD
• Bottom quark and tau lepton masses in a toy $\mathrm{SU}(6)$
• Unbinned inclusive cross-section measurements with machine-learned systematic uncertainties
• Study the Higgs mass with the effective potential and Higgs decays in the $U(1{)}_X$SSM
• Probing Electroweak Phase Transition in Extended Singlet Scalar Model with Resonant $HH$ production in $bbZZ$ Channel using Parameterized Machine Learning
• Alternative Perspective on Gauged Lepton Number and Implications for Collider Physics
• Light dark matter around 100 GeV from the inert doublet model
• Electroweak corrections to Higgs boson production via W W fusion at the future LHeC
• State-of-the-art cross sections for ttH: NNLO predictions matched with NNLL resummation and EW corrections
• Vacuum stability with radiative Yukawa couplings
• Measurement of Higgs-boson self-coupling with single-Higgs and double-Higgs production channels
• Full one-loop radiative corrections to $e^{+}{e}^{-}\to H^{+}{H}^{-}$ in the inert doublet model
• Boosting Invisible Higgs Searches by Tagging a Gluon Jet for Gluon Fusion Process
• New Technologies for Discovery
• Identification of tau leptons using a convolutional neural network with domain adaptation
• High-level hadronic tau lepton triggers of the CMS experiment in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV
• Higgs couplings in ATLAS at Run2
• Higgs Yukawa coupling constraints on a benchmark one-loop radiative mass model for the bottom, charm and tau
• Study $\gamma \gamma \to {\tau }^{+}{\tau }^{-}$ process including ${\tau }^{+}{\tau }^{-}$ spin information in Pb-Pb ultraperipheral collision and at Lepton collider
• Illuminating all-hadronic final states with a photon: Exotic decays of the Higgs boson to four bottom quarks in vector boson fusion plus gamma at hadron colliders