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Direct Bound on the Total Decay Width of the Top Quark in pp̅ Collisions at √s=1.96 TeV
Published 2010“…The distribution of reconstructed top quark mass from these events is fitted to templates representing different values of the top quark width. …”
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Search for the standard model Higgs boson produced through vector boson fusion and decaying to b[bar over b]
Published 2016“…The observed significance in these data samples for a H → b[bar over b] signal at a mass of 125 GeV is 2.2 standard deviations, while the expected significance is 0.8 standard deviations. The fitted signal strength μ = σ/σ[subscript SM] = 2.8[+1.6 over −1.4]. …”
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Event generator tunes obtained from underlying event and multiparton scattering measurements
Published 2017“…In addition, it is investigated whether the values of the parameters obtained from fits to UE observables are consistent with the values determined from fitting observables sensitive to double-parton scattering processes. …”
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Measurement of the top quark mass in the all-hadronic mode at CDF
Published 2014“…The fit yields a value of Mtop=172.5±1.4(stat)±1.0(JES)±1.1(syst)GeV/c[superscript 2].…”
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Observation of the Y (4140) structure in the J/ψϕ mass spectrum in B±→ J/ψϕK± decays
Published 2022“…The fit yields a signal of 19 ± 6 (stat) ± 3 (syst) resonance events, and resonance mass and width of 4143.4+2.9 -3.0 (stat)±0.6 (syst) MeV/c2 and 15.3+10.4 -6.1 (stat)±2.5 (syst) MeV/c2, respectively. …”
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Measurement of the t[overline t] production cross section in the all-jet final state in pp collisions at √s =7 TeV
Published 2018“…The cross section is determined through an unbinned maximum likelihood fit of background and t̄t signal to the reconstructed mass spectrum of t̄t candidates in the data, in which events are subjected to a kinematic fit assuming a t̄t → W + bW - ̄b → 6 jets hypothesis. …”
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Measurement of the t[bar over t] Production Cross Section in the All-Jet Final State in Pp Collisions at √s =7 TeV
Published 2018“…The cross section is determined through an unbinned maximum likelihood fit of background and t[bar over t] signal to the reconstructed mass spectrum of t[bar over t] candidates in the data, in which events are subjected to a kinematic fit assuming a t[bar over t]→W[superscript +]bW[superscript −][bar over b] →6 jets hypothesis. …”
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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
Published 2015“…The observed (expected) exclusion limit at a 95 % confidence level is μ < 4.2 (3.3), corresponding to a best fit value [^ over μ] = 1.2[+1.6 over −1.5].…”
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Combined Measurement of the Higgs Boson Mass in pp Collisions at √s = 7 and 8 TeV with the ATLAS and CMS Experiments
Published 2015“…The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. …”
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Measurement of the top-quark mass in t[overline t] events with lepton+jets final states in pp collisions at √s = 7 TeV
Published 2018“…For each event the mass is reconstructed from a kinematic fit of the decay products to a t̄t hypothesis. The top-quark mass is determined simultaneously with the jet energy scale (JES), constrained by the known mass of the W boson in q̄q decays, to be 173.49 ± 0.43 (stat. + JES) ±0.98 (syst.) …”
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Measurement of the WW plus WZ production cross section using a matrix element technique in lepton plus jets events
Published 2011“…The WW+WZ cross section is measured to be 17.4±3.3 pb in agreement with standard model predictions. A fit to the dijet invariant mass spectrum yields a compatible cross section measurement.…”
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Measurement of the top-quark mass in all-jets t[bar over t] events in pp collisions at √s =7 TeV
Published 2014“…The mass is reconstructed for each event employing a kinematic fit of the jets to a t[bar over t] hypothesis. The top-quark mass is measured to be 173.49 ± 0.69 (stat.) ± 1.21 (syst.) …”
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Alignment of the CMS silicon tracker during commissioning with cosmic rays
Published 2019“…The results have been validated by several studies, including laser beam cross-checks, track fit self-consistency, track residuals in overlapping module regions, and track parameter resolution, and are compared with predictions obtained from simulation. …”
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Measurement of the top-quark mass in t[bar over t] events with dilepton final states in pp collisions at s√=7 TeV
Published 2016“…Using a maximum-likelihood fit, the top-quark mass is determined to be 172.5±0.4 (stat.)±1.5 (syst.) …”
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Measurement of top quark polarisation in t-channel single top quark production
Published 2017“…Signal and background components are estimated using a fit to data. A differential cross section measurement, corrected for detector effects, of an angular observable sensitive to the top quark polarisation is performed. …”
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Measurement of the Mass Difference between t and [overline t] Quarks
Published 2018“…The resulting mass difference distribution of data is compared to templates of signals and background using a maximum likelihood fit. From a sample corresponding to an integrated luminosity of 5.6fb ⁻¹, we measure a mass difference, ΔM top =M t -M t̄ =-3.3±1.4(stat) ±1.0(syst)GeV/c², approximately 2standard deviations away from the CPT hypothesis of zero mass difference.…”
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Measurement of the tt¯Production Cross Section Using Events with One Lepton and at Least One Jet in Pp Collisions at √s = 13 TeV
Published 2019“…Final states with one isolated charged lepton (electron or muon) and at least one jet are selected and categorized according to the accompanying jet multiplicity. From a likelihood fit to the invariant mass distribution of the isolated lepton and a jet identified as coming from the hadronization of a bottom quark, the cross section is measured to be σtt¯=888 ± 2,(stat)₋₂₈⁺²⁶(syst)±20(lumi) pb, in agreement with the standard model prediction. …”
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Search for a Heavy Toplike Quark in p p ¯ Collisions at √ s = 1.96 TeV
Published 2022“…We perform parallel searches for t ′→Wb and t ′→Wq (where q is a generic down-type quark) in events containing a lepton and four or more jets. By performing a fit to the two-dimensional distribution of total transverse energy versus reconstructed t ′ quark mass, we set upper limits on the t ′t ̄′ production cross section and exclude a standard model fourth-generation t ′ quark decaying to Wb (Wq) with mass below 358 (340)GeV/c2 at 95% C.L. © 2011 American Physical Society.…”
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Non-Gaussian elliptic-flow fluctuations in PbPb collisions at √ s NN = 5.02 TeV
Published 2022“…Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy. 2 NN 2 T 2 2 2…”
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First Observation of B[over-bar][subscript s][superscript 0]-->D[subscript s][superscript ±]K[superscript ∓] and Measurement of the Ratio of Branching Fractions B(B[over-bar][subsc...
Published 2010“…A combined mass and particle identification fit is used to make the first observation of the decay B[over-bar] s0-->Ds±K∓ and measure the branching fraction of B[over-bar] s0-->Ds±K∓ relative to B[over-bar] s0-->Ds+pi-. …”
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