Publications
1124 results found
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the Effective Weak Mixing Angle in pp¯→Z/γ∗→e+e− Events, Physical Review Letters, Vol: 115, ISSN: 1079-7114
Abazov VM, Abbott B, Acharya BS, et al., 2015, Precision measurement of the top-quark mass in lepton+jets final states, Physical Review D, Vol: 91, ISSN: 1550-7998
We measure the mass of the top quark in lepton+jets final states using the full sample of pp¯ collision data collected by the D0 experiment in Run II of the Fermilab Tevatron Collider at s√=1.96 TeV, corresponding to 9.7 fb−1 of integrated luminosity. We use a matrix element technique that calculates the probabilities for each event to result from tt¯ production or background. The overall jet energy scale is constrained in situ by the mass of the W boson. We measure mt=174.98±0.76 GeV. This constitutes the most precise single measurement of the top-quark mass.
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the electron charge asymmetry in <i>p</i>(<i>p</i>)over-bar → <i>W</i> + <i>X</i> → <i>e</i>ν + <i>X</i> decays in <i>p</i>(<i>p</i>)over-bar collisions at √<i>s</i> = 1.96 TeV (vol 91, 032007, 2015), PHYSICAL REVIEW D, Vol: 91, ISSN: 1550-7998
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- Citations: 20
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the forward-backward asymmetry in Λ<i><sub>b</sub></i><SUP>0</SUP> and (Λ)over-bar<i><sub>b</sub></i><SUP>0</SUP> baryon production in <i>p</i>(<i>p</i>)over-bar collisions at √<i>s</i>=1.96 TeV, PHYSICAL REVIEW D, Vol: 91, ISSN: 1550-7998
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- Citations: 4
Aaltonen T, Abazov VM, Abbott B, et al., 2015, Tevatron Constraints on Models of the Higgs Boson with Exotic Spin and Parity Using Decays to Bottom-Antibottom Quark Pairs, PHYSICAL REVIEW LETTERS, Vol: 114, ISSN: 0031-9007
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- Citations: 3
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the <i>W</i> plus <i>b</i>-jet and <i>W</i> plus <i>c</i>-jet differential production cross sections in <i>p</i> (<i>p</i>)over-bar collisions at √<i>s</i>=1.96 TeV, PHYSICS LETTERS B, Vol: 743, Pages: 6-14, ISSN: 0370-2693
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- Citations: 6
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the φ<sub>η</sub>* distribution of muon pairs with masses between 30 and 500 GeV in 10.4 fb<SUP>-1</SUP> of <i>p</i>(<i>p</i>)over-bar collisions, PHYSICAL REVIEW D, Vol: 91, ISSN: 1550-7998
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- Citations: 5
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the ratio of inclusive cross sections σ(<i>p</i>(<i>p</i>)over-bar) → <i>Z</i>+2<i>b</i> jets/σ(<i>p</i>((<i>p</i>)over-bar) → <i>Z</i>+2 jets) in <i>p</i>((<i>p</i>)over-bar) collisions at √<i>s</i>=1.96 TeV, PHYSICAL REVIEW D, Vol: 91, ISSN: 1550-7998
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- Citations: 3
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the <i>B<sub>s</sub></i><SUP>0</SUP> Lifetime in the Flavor-Specific Decay Channel <i>B<sub>s</sub></i><SUP>0</SUP>→<i>D<sub>s</sub></i><SUP>-</SUP>μ<SUP>+</SUP>ν<i>X</i>, PHYSICAL REVIEW LETTERS, Vol: 114, ISSN: 0031-9007
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- Citations: 9
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the Forward-Backward Asymmetry in the Production of B<SUP>±</SUP> Mesons in p(p)over-bar Collisions at √s=1.96 TeV, PHYSICAL REVIEW LETTERS, Vol: 114, ISSN: 0031-9007
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- Citations: 10
Abazov VM, Abbott B, Acharya BS, et al., 2015, Measurement of the electron charge asymmetry in p(p)over-bar -> W + X -> ev plus X decays in p(p)over-bar collisions at root S=1.96 TeV, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 91, ISSN: 1550-2368
We present a measurement of the electron charge asymmetry in p¯p→W+X→eν+X events at a center-of-mass energy of 1.96 TeV, using data corresponding to 9.7 fb−1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron Collider. The asymmetry is measured as a function of the electron pseudorapidity and is presented in five kinematic bins based on the electron transverse energy and the missing transverse energy in the event. The measured asymmetry is compared with next-to-leading-order predictions in perturbative quantum chromodynamics and provides accurate information for the determination of parton distribution functions of the proton. This is the most precise lepton charge asymmetry measurement to date.
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of the direct <i>CP</i>-violating parameter A<sub>CP</sub> in the decay D<SUP>+</SUP> → K<SUP>-</SUP>π<SUP>+</SUP>π<SUP>+</SUP>, PHYSICAL REVIEW D, Vol: 90, ISSN: 1550-7998
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- Citations: 6
Abazov VM, Abbott B, Acharya BS, et al., 2014, Observation and studies of double J/psi production at the Tevatron, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 90, ISSN: 1550-2368
We present the observation of doubly produced J/ψ mesons with the D0 detector at Fermilab in p¯p collisions at √s=1.96 TeV. The production cross section for both singly and doubly produced J/ψ mesons is measured using a sample with an integrated luminosity of 8.1 fb−1. For the first time, the double J/ψ production cross section is separated into contributions due to single and double parton scatterings. Using these measurements, we determine the effective cross section σeff, a parameter characterizing an effective spatial area of the parton-parton interactions and related to the parton spatial density inside the nucleon.
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of differential tt production cross sections in pp collisions, PHYSICAL REVIEW D, Vol: 90, ISSN: 1550-7998
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- Citations: 32
Abazov VM, Abbott B, Acharya BS, et al., 2014, Jet energy scale determination in the DO experiment, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 763, Pages: 442-475, ISSN: 0168-9002
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- Citations: 19
Abazov VM, Abbott B, Acharya BS, et al., 2014, Improved <i>b</i> quark jet identification at the D0 experiment, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 763, Pages: 290-303, ISSN: 0168-9002
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- Citations: 18
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of the forward-backward asymmetry in top quark-antiquark production in p(p)over-bar collisions using the lepton plus jets channel, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 90, ISSN: 1550-2368
We present a measurement of the forward–backward asymmetry in top quark–antiquark production using the full Tevatron Run II data set collected by the D0 experiment at Fermilab. The measurement is performed in lepton+jets final states using a new kinematic fitting algorithm for events with four or more jets and a new partial reconstruction algorithm for events with only three jets. Corrected for detector acceptance and resolution effects, the asymmetry is evaluated to be AFB=(10.6±3.0)%. Results are consistent with the standard model predictions which range from 5.0% to 8.8%. We also present the dependence of the asymmetry on the invariant mass of the top quark–antiquark system and the difference in rapidities of the top quark and antiquark.
Abazov VM, Abbott B, Acharya BS, et al., 2014, Constraints on Models for the Higgs Boson with Exotic Spin and Parity in <i>VH</i> → <i>Vb</i>(<i>b</i>)over-bar Final States, PHYSICAL REVIEW LETTERS, Vol: 113, ISSN: 0031-9007
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- Citations: 7
Abazov VM, 2014, Publisher’s Note: Measurement of the electric charge of the top quark in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mover accent="true"><mml:mi>t</mml:mi><mml:mo accent="true" stretchy="false">¯</mml:mo></mml:mover></mml:math>events [Phys. Rev. D<b>90</b>, 051101(R) (2014)], Physical Review D, Vol: 90, ISSN: 1550-7998
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of the differential γ+2b-jet cross section and the ration σ(γ+2<i>b</i>-jets)/σ(γ plus <i>b</i>-jet) in p(p)over-bar collisions at √s=1.96 TeV, PHYSICS LETTERS B, Vol: 737, Pages: 357-365, ISSN: 0370-2693
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- Citations: 6
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of the forward-backward asymmetry in the distribution of leptons in <i>t</i>(<i>t</i>)over-bar events in the lepton plus jets channel, PHYSICAL REVIEW D, Vol: 90, ISSN: 1550-7998
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- Citations: 23
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of the electric charge of the top quark in <i>t</i>(<i>t</i>)over-bar events, PHYSICAL REVIEW D, Vol: 90, ISSN: 1550-7998
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- Citations: 7
Abazov VM, Abbott B, Acharya BS, et al., 2014, Precision measurement of the top quark mass in lepton plus jets final states, Physical Review Letters, Vol: 113, ISSN: 0031-9007
We measure the mass of the top quark in lepton+jets final states using the full sample of p¯p collision data collected by the D0 experiment in Run II of the Fermilab Tevatron Collider at √s=1.96 TeV, corresponding to 9.7 fb−1 of integrated luminosity. We use a matrix element technique that calculates the probabilities for each event to result from t¯t production or background. The overall jet energy scale is constrained in situ by the mass of the W boson. We measure mt=174.98±0.76 GeV. This constitutes the most precise single measurement of the top-quark mass.
Abazov VM, Abbott B, Acharya BS, et al., 2014, Electron and photon identification in the Do experiment, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 750, Pages: 78-95, ISSN: 0168-9002
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- Citations: 19
Aaltonen T, Abazov VM, Abbott B, et al., 2014, Observation of s-channel production of single top quarks at the tevatron, Physical Review Letters, Vol: 112, ISSN: 0031-9007
We report the first observation of single-top-quark production in the s channel through the combination of the CDF and D0 measurements of the cross section in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb−1 per experiment. The measured cross section is σs=1.29+0.26−0.24 pb. The probability of observing a statistical fluctuation of the background to a cross section of the observed size or larger is 1.8×10−10, corresponding to a significance of 6.3 standard deviations for the presence of an s-channel contribution to the production of single-top quarks.
Abazov VM, Abbott B, Acharya BS, et al., 2014, Measurement of the W Boson Production Charge Asymmetry in <i>p</i>(<i>p</i>)over-bar → <i>W</i> plus <i>X</i> → <i>ev</i> plus X Events at √<i>s</i>=1.96 Tev, PHYSICAL REVIEW LETTERS, Vol: 112, ISSN: 0031-9007
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- Citations: 22
Abazov VM, Abbott B, Acharya BS, et al., 2014, Double parton interactions in γ+3 jet and γ plus b/c jet+2 jet events in p(p)over-bar collisions at √s=1.96 TeV, PHYSICAL REVIEW D, Vol: 89, ISSN: 1550-7998
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- Citations: 37
Aaltonen T, Abazov VM, Abbott B, et al., 2014, Combination of measurements of the top-quark pair production cross section from the Tevatron Collider, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 89, ISSN: 1550-2368
We combine six measurements of the inclusive top-quark pair (t¯t) production cross section (σt¯t) from data collected with the CDF and D0 detectors at the Fermilab Tevatron with proton-antiproton collisions at √s=1.96 TeV. The data correspond to integrated luminosities of up to 8.8 fb−1. We obtain a value of σt¯t=7.60±0.41 pb for a top-quark mass of mt=172.5 GeV. The contributions to the uncertainty are 0.20 pb from statistical sources, 0.29 pb from systematic sources, and 0.21 pb from the uncertainty on the integrated luminosity. The result is in good agreement with the standard model expectation of 7.35+0.28−0.33 pb at next-to-next-to-leading order and next-to-next-to leading logarithms in perturbative QCD.
Chatrchyan S, Khachatryan V, Sirunyan AM, et al., 2014, Search for anomalous production in the highly-boosted all-hadronic final state (vol 09, 029, 2012), JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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