A Precision Measurement of the Mass of the Top Quark

Abstract

The Standard Model of particle physics contains about two dozen parameters - such as particle masses - whose origins are still unknown and cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top (t) quark (M_t) and W boson constrain the mass of the long-hypothesized, but thus far not observed, Higgs boson. A precise measurement of the top-quark mass can therefore point to where to look for the Higgs, and indeed whether the hypothesis of a SM Higgs is consistent with experimental data. Since top quarks are produced in pairs and decay in only ~10^-24 s into various final states, reconstructing their mass from their decay products is very challenging. Here we report a technique that extracts far more information from each top-quark event and yields a greatly improved precision on the top mass of 5.3 GeV/c^2, compared to previous measurements. When our new result is combined with our published measurement in a complementary decay mode and with the only other measurements available, the new world average for M_t becomes 178.0 +- 4.3 GeV/c^2. As a result, the most likely Higgs mass increases from the experimentally excluded value of 96 GeV/c^2 to 117 GeV/c^2, which is beyond current experimental sensitivity. The upper limit on the Higgs mass at 95% confidence level is raised from 219 GeV/c^2 to 251 GeV/c^2.

For high-resolution version of figures, the article, as appeared in Nature, and related News & Views, see http://www-d0.fnal.gov/Run2Physics/top/public/public.html (8 pages, 4 color figures)

References in corpus (2)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measurement of the top quark mass in the dilepton channel

Cited by in corpus (173)

• Precision Electroweak Measurements on the Z Resonance
• Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
• The Upgraded D0 Detector
• Observation of Single Top-Quark Production
• The 2004 UTfit Collaboration Report on the Status of the Unitarity Triangle in the Standard Model
• Observation of $\mathrm{t}\overline{\mathrm{t}}$H production
• Jets from Massive Unstable Particles: Top-Mass Determination
• Bottom-Up Approach to Moduli Dynamics in Heavy Gravitino Scenario : Superpotential, Soft Terms and Sparticle Mass Spectrum
• Search for the Standard Model Higgs boson produced in association with top quarks and decaying into $b\bar{b}$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Combination of the top-quark mass measurements from the Tevatron collider
• Constraining Effective Field Theories with Machine Learning
• Adversarially-trained autoencoders for robust unsupervised new physics searches
• A Guide to Constraining Effective Field Theories with Machine Learning
• Renormalization-Group Improved Calculation of the B->Xs+gamma Branching Ratio
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• Evidence for production of single top quarks
• Evidence for production of single top quarks and first direct measurement of |Vtb|
• Standard Model Top Quark Asymmetry at the Fermilab Tevatron
• A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
• Automation of the matrix element reweighting method
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 2. $t$-channel Process
• Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method
• Indirect Sensitivities to the Scale of Supersymmetry
• The MSSM confronts the precision electroweak data and the muon g-2
• Dark Force Detection in Low Energy e-p Collisions
• Neutralino Dark Matter in mSUGRA: reopening the light Higgs pole window
• Measuring Supersymmetry
• Updated Constraints on the Minimal Supergravity Model
• The Matrix Element Method at Next-to-Leading Order
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 1. s-channel Process
• Supersymmetric Benchmarks with Non-Universal Scalar Masses or Gravitino Dark Matter
• Search for $\mathrm{t}\overline{\mathrm{t}}$H production in the H $\to$ $\mathrm{b}\overline{\mathrm{b}}$ decay channel with leptonic $\mathrm{t}\overline{\mathrm{t}}$ decays in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Scales of Fermion Mass Generation and Electroweak Symmetry Breaking
• Finding physics signals with event deconstruction
• Beyond Geolocating: Constraining Higher Dimensional Operators in $H\to 4\ell$ with Off-Shell Production and More
• Measuring the Invisible Higgs Width at the 7 and 8 TeV LHC
• The Matrix Element Method and QCD Radiation
• Determination of the top quark mass circa 2013: methods, subtleties, perspectives
• Top quark physics in hadron collisions
• The Matrix Element Method and its Application to Measurements of the Top Quark Mass
• Unravelling $t\bar{t}h$ via the matrix element method
• Measurement of the top quark mass in the lepton+jets final state with the matrix element method
• Measurement of the t-channel single top quark production cross section
• Higgs Physics: It ain't over till it's over
• Search for pair production of heavy vector-like quarks decaying into hadronic final states in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• On the Interpretation of B_s to mu^+ mu^- in the CMSSM
• Top Quark Mass Measurement from Dilepton Events at CDF II
• WMAP Dark Matter Constraints and Yukawa Unification in SUGRA models with CP Phases
• Precision measurement of the top-quark mass in lepton+jets final states
• Extending the Matrix Element Method beyond the Born approximation: Calculating event weights at next-to-leading order accuracy
• Probing CP Violation in $h\to \gamma \gamma$ with Converted Photons
• Combination of CDF and D0 measurements of the W boson helicity in top quark decays
• Precise measurement of the top quark mass from lepton+jets events at D0
• Next-to-Leading Order QCD Corrections to the Direct Top Quark Production via Model-independent FCNC Couplings at Hadron Colliders
• Improving the sensitivity of Higgs boson searches in the golden channel
• Precision measurement of the top quark mass from dilepton events at CDF II
• Phenomenological Indications of the Scale of Supersymmetry
• Minimal conformal extensions of the Higgs sector
• Feynman-Weinberg Quantum Gravity and the Extended Standard Model as a Theory of Everything
• Search for $\mathrm{t}\overline{\mathrm{t}}$H production in the all-jet final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Polishing a shiny Higgs with matrix elements
• Learning to Simulate High Energy Particle Collisions from Unlabeled Data
• Geolocating the Higgs Boson Candidate at the LHC
• Measurement of the top quark mass in the lepton+jets channel using the Ideogram Method
• Top Quark Mass Measurement from Dilepton Events at CDF II with the Matrix-Element Method
• Improved Measurement of ttZ Couplings at the LHC
• Two Invertible Networks for the Matrix Element Method
• Measurement of the associated production of a single top quark and a Z boson in pp collisions at $\sqrt{s}=$ 13 TeV
• Precise measurement of the top-quark mass from lepton+jets events at D0
• A Supersymmetric Explanation of the Excess of Higgs-Like Events at LEP
• Probing Topcolor-Assisted Technicolor from Like-sign Top Pair Production at LHC
• Measurement of spin correlations in t t-bar production using the matrix element method in the muon + jets final state in pp collisions at sqrt(s) = 8 TeV
• Measurement of the Helicity of W Bosons in Top-Quark Decays
• Precise measurement of the top quark mass in the lepton+jets topology at CDF II
• Maximum Significance at the LHC and Higgs Decays to Muons
• Direct measurement of the mass difference between top and antitop quarks
• Measurement of W-Boson Polarization in Top-quark Decay in ppbar Collisions at sqrt(s) = 1.96 TeV
• Constraining CP-violation in the Higgs-top-quark interaction using machine-learning-based inference
• On the Higgs Mass in the CMSSM
• Precision Top Quark Mass Measurement in the Lepton + Jets Topology in ppbar Collisions at sqrt(s) = 1.96 TeV
• Exploring Theory Space with Monte Carlo Reweighting
• Measuring the Higgs-bottom coupling in weak boson fusion
• Finding the Higgs boson in decays to Z gamma using the matrix element method at Next-to-Leading Order
• Top-Quark Physics: Status and Prospects
• Status and Prospects of Top-Quark Physics
• Rare top quark and Higgs boson decays in Alternative Left-Right Symmetric Models
• Review of Top Quark Physics Results
• Machine Learning in High Energy Physics Community White Paper
• Precise measurement of the top quark mass in the dilepton channel at D0
• Phenomenology of a Fluxed MSSM
• Measurement of the Top Quark Mass with the Dynamical Likelihood Method using Lepton plus Jets Events with b-tags in ppbar Collisions at s**(1/2) = 1.96 TeV
• Top Quark Mass Measurement in the Lepton plus Jets Channel Using a Modified Matrix Element Method
• The Matrix Element Method at next-to-leading order QCD for hadronic collisions: Single top-quark production at the LHC as an example application
• OPTIMASS: A Package for the Minimization of Kinematic Mass Functions with Constraints
• A method for measurement of the top quark mass using the mean decay length of b hadrons in ttbar events
• Calculation of two-loop QCD corrections for hadronic single top-quark production in the t channel
• Accelerated Matrix Element Method with Parallel Computing
• Measurement of W-Boson Polarization in Top-quark Decay using the Full CDF Run II Data Set
• Measuring Boosted Tops in Semi-leptonic $t\bar{t}$ Events for the Standard Model and Beyond
• Studying top quark decay into the polarized W-boson in the TC2 model
• Effective potential (in)stability and lower bounds on the scalar (Higgs) mass
• Measurement of the top quark mass in $\boldsymbol{\ppbar}$ collisions using events with two leptons
• Review of Properties of the Top Quark from Measurements at the Tevatron
• Playing Tag with ANN: Boosted Top Identification with Pattern Recognition
• Dark matter and Colliders searches in the MSSM
• Effective LHC measurements with matrix elements and machine learning
• Precision measurement of the top-quark mass in lepton+jets final states
• Precision-Machine Learning for the Matrix Element Method
• MadMax, or Where Boosted Significances Come From
• Improved mass measurement using the boundary of many-body phase space
• Using the (Modified) Matrix Element Method to constrain $L_{\mu }-L_{\tau }$ Interactions
• Higher Order Stability of a Radiatively Induced 220 GeV Higgs Mass
• Stability of Subsequent-to-Leading-Logarithm Corrections to the Effective Potential for Radiative Electroweak Symmetry Breaking
• Identifying Phase Space Boundaries with Voronoi Tessellations
• General analysis of signals with two leptons and missing energy at the Large Hadron Collider
• Measurement of off-shell Higgs boson production in the $H^{\ast }\to ZZ\to 4\ell$ decay channel using a neural simulation-based inference technique in 13 TeV $pp$ collisions with the ATLAS detector
• Observation of Single Top Quark Production at the Tevatron Collider
• A Search for the Higgs Boson Produced in Association with $Z\to {\ell }^{+}{\ell }^{-}$ Using the Matrix Element Method at CDF II
• Precision measurements of the top quark mass from the Tevatron in the pre-LHC era
• Measurement of the Top Quark Mass Using the Matrix Element Technique in Dilepton Final States
• Optimal determination of New Physics couplings: A comparative study
• Search for Higgs Bosons Decaying into b anti-b and Produced in Association with a Vector Boson in Proton-Antiproton Collisions at 1.8 TeV
• Matrix Element Method in HEP: Transfer Functions, Efficiencies, and Likelihood Normalization
• Experimental Precision Tests for the Electroweak Standard Model
• Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector
• Combination of D0 measurements of the top quark mass
• QCD corrections to the Wilson coefficients C9 and C10 in two-Higgs doublet models
• Reconstructing the invisible with matrix elements
• Properties of the Top Quark
• Systematic Quark/Gluon Identification with Ratios of Likelihoods
• High Energy WW Scattering at the LHC with the Matrix Element Method
• Some recent theoretical progress in Higgs boson and top quark physics at hadron colliders
• Observation of Single Top Quark Production
• Toponium: the smallest bound state and simplest hadron in quantum mechanics
• The littlest Higgs model and Higgs boson associated production with top quark pair at high energy linear $e^{+}{e}^{-}$ collider
• Asymmetry and Minimality of Quark Mass Matrices
• Exploring BSM Higgs couplings in single top-quark production
• Optimising HEP parameter fits via Monte Carlo weight derivative regression
• Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
• Interpretable deep learning models for the inference and classification of LHC data
• Discovery potential for a charged Higgs boson decaying in the chargino-neutralino channel of the ATLAS detector at the LHC
• Acceleration of matrix element computations for precision measurements
• Same-sign W pair production in composite Higgs models
• Summary of ICHEP 2004
• Higgs Inflation: constraining the top quark mass and breaking the $H_0$-${\sigma }_8$ correlation
• Effects of R-parity violation in unpolarized top quark decay into polarized W-boson
• Flavor changing scalar couplings and $t\gamma (Z)$ production at hadron colliders
• Discoveries far from the Lamppost with Matrix Elements and Ranking
• Effects of SO(10)-inspired scalar non-universality on the MSSM parameter space at large tan beta
• CPT analysis with top physics
• Top Quark Physics at the Tevatron
• Littlest Higgs model and top-charm production at high-energy linear colliders
• Top-philic Machine Learning
• Physics Possibilities at a Linear Collider
• Advances in Multi-Variate Analysis Methods for New Physics Searches at the Large Hadron Collider
• Computer Simulations of High Energy Physics
• Measuring the mass, width, and couplings of semi-invisible resonances with the Matrix Element Method
• The Matrix Element Method at next-to-leading order accuracy
• Single-top quark physics at the LHC: from precision measurements to rare processes and top quark properties
• Efficient Probabilistic Inference in the Quest for Physics Beyond the Standard Model
• Identifying a new particle with jet substructures
• Top Quark Mass Measurements at CDF
• Radiative Electroweak Symmetry Breaking Beyond Leading Logarithms
• Single Top Quarks at the Tevatron
• Ultimate Quantum Precision Limit at Colliders: Conditions and Case Studies
• Towards a generic implementation of matrix-element maximisation as a classifier in particle physics
• Effects of R-parity Violation on the Charged Higgs Boson Decays
• Top Quark Measurements
• A Novel Implementation of the Matrix Element Method at Next-to-Leading Order for the Measurement of the Higgs Self-Coupling ${\lambda }_{3H}$
• HYTREES: Combining Matrix Elements and Parton Shower for Hypothesis Testing
• Measurement of the Top Quark Mass In All-Jet Events
• Physics at Tevatron Run II
• Low energy theorems and the unitarity bounds in the extra U(1) superstring inspired E6 models