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Search For The Standard Model Higgs Boson In The Missing Energy And Acoplanar B-Jet Topology At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For The Standard Model Higgs Boson In The Missing Energy And Acoplanar B-Jet Topology At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We report a search for the standard model Higgs boson in the missing energy and acoplanar b-jet topology, using an integrated luminosity of 0.93 fb-1 recorded by the D0 detector at the Fermilab Tevatron pp Collider. The analysis includes signal contributions from pp → ZH → ννbb, as well as from WH production in which the charged lepton from the W boson decay is undetected. Neural networks are used to separate signal from background. In the absence of a signal, we set limits on σ (pp → VH) x B(H → bb) at the 95% …
Search For Third Generation Scalar Leptoquarks Decaying Into ΤB, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Third Generation Scalar Leptoquarks Decaying Into ΤB, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We have searched for third generation leptoquarks (LQ3) using 1.05 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider operating at √s = 1.96 TeV. We set a 95% C.L. lower limit of 210 GeV on the mass of a scalar LQ3 state decaying solely to a b quark and a τ lepton.
Measurement Of BS0 Mixing Parameters From The Flavor-Tagged Decay BS0 → J/Ψφ, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of BS0 Mixing Parameters From The Flavor-Tagged Decay BS0 → J/Ψφ, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
From an analysis of the flavor-tagged decay Bs0 → J/ ψφ we obtain the width difference between the Bs0 light and heavy mass eigenstates, ΔΓs = 0.19 ± 0.07 (stat)-0.01+0.02 (syst) ps-1, and the CP-violating phase, φs = -0.57-0.30+0.24(stat)-0.02+0.08(syst). The allowed 90% CL intervals of ΔΓs and φs are 0.06 < ΔΓs < 0.30 ps-1 and -1.20< φs < 0.06, respectively. The data sample corresponds to an integrated luminosity of 2.8 fb-1 accumulated with the D0 detector at the Fermilab Tevatron collider.
Observation Of The Doubly Strange B Baryon ΩB-, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Observation Of The Doubly Strange B Baryon ΩB-, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We report the observation of the doubly strange b baryon Ωb- in the decay channel Ωb- → J/ψΩ-, with J/ψ → μ+μ- and Ω- → ΛK- → (pπ-)K-, in pp collisions at √s = 1.96 TeV. Using approximately 1.3 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider, we observe 17:8 ± 4.9(stat) ± 0.8(syst) Ωb- signal events at a mass of 6.165 ± 0.010(stat) ± 0.013(syst) GeV. The significance of …
Search For Neutral Higgs Bosons In Multi-B-Jet Events In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Neutral Higgs Bosons In Multi-B-Jet Events In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
Data recorded by the D0 experiment at the Fermilab Tevatron Collider are analyzed to search for neutral Higgs bosons produced in association with b quarks. This production mode can be enhanced in the minimal supersymmetric standard model (MSSM). The search is performed in the three b quark channel using multijet triggered events corresponding to an integrated luminosity of 1 fb-1. No statistically significant excess of events with respect to the predicted background is observed and limits are set in the MSSM parameter space.
Search For Anomalous Wtb Couplings In Single Top Quark Production, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Anomalous Wtb Couplings In Single Top Quark Production, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
In 0.9 fb-1 of pp collisions, the D0 Collaboration presented evidence for single top quark production in events with an isolated lepton, missing transverse momentum, and two to four jets. We examine these data to study the Lorentz structure of the Wtb coupling. The standard model predicts a left-handed vector coupling at the Wtb vertex. The most general lowest dimension, CP-conserving Lagrangian admits right-handed vector and left- or right-handed tensor couplings as well. We find that the data prefer the left-handed vector coupling and set upper limits on the anomalous couplings. These are the first direct constraints on …
Measurement Of The Electron Charge Asymmetry In Pp → W + X → Eν + X Events At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Electron Charge Asymmetry In Pp → W + X → Eν + X Events At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a measurement of the electron charge asymmetry in pp → W + X → eν + X events at a center of mass energy of 1.96 TeV using 0.75 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider. The asymmetry is measured as a function of the electron transverse momentum and pseudorapidity in the interval (-3.2, 3.2) and is compared with expectations from next-to-leading order calculations in perturbative quantum chromodynamics. These measurements will allow more accurate determinations of the proton parton distribution functions.
Measurement Of The Forward-Backward Charge Asymmetry And Extraction Of Sin2ӨWEff In Pp → Z/Γ* +X → E+E- + X Events Produced At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Forward-Backward Charge Asymmetry And Extraction Of Sin2ӨWEff In Pp → Z/Γ* +X → E+E- + X Events Produced At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a measurement of the forward-backward charge asymmetry (AFB) in pp → Z/γ* +X → e+e- + X events at a center-of-mass energy of 1.96 TeV using 1.1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron collider. AFB is measured as a function of the invariant mass of the electron-positron pair, and found to be consistent with the standard model prediction. We use the AFB measurement to extract the effective weak mixing angle sin2ӨWeff = 0.2326 ± 0.0018 (stat) ± 0.0006 (syst).
Precise Measurement Of The Top-Quark Mass From Lepton + Jets Events, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Precise Measurement Of The Top-Quark Mass From Lepton + Jets Events, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Kenneth Bloom Publications
We measure the mass of the top quark using top-quark pair candidate events in the lepton + jets channel from data corresponding to 1 fb-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron collider. We use a likelihood technique that reduces the jet energy scale uncertainty by combining an in situ jet energy calibration with the independent constraint on the jet energy scale (JES) from the calibration derived using photon þ jets and dijet samples. We find the mass of the top quark to be 171.5 ± 1.8(stat) + JES) ± 1.1(syst) GeV.
Measurement Of The Polarization Of The Ү(1S) And Ү(2S) States In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Polarization Of The Ү(1S) And Ү(2S) States In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a study of the polarization of the Ү(1S) and Ү(2S) states using a 1.3 fb-1 data sample collected by the D0 experiment in 2002–2006 during run II of the Fermilab Tevatron Collider. We measure the polarization parameter α = (σT - 2σL), where σT and σL are the transversely and longitudinally polarized components of the production cross section, as a function of the transverse momentum (pTҮ) for the Ү(1S) and Ү(2S). Significant pTҮ-dependent longitudinal polarization is observed …
Observation Of Zz Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Observation Of Zz Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Kenneth Bloom Publications
We present an observation for ZZ → ℓ+ ℓ-ℓ‘+ℓ‘- (ℓ, ℓ‘ = e or μ ) production in pp collisions at a center-of-mass energy of √s = 1.96 TeV. Using 1.7 fb-1 of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14+0.03 -0.02 events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ → ℓ+ ℓ-vv, yields a significance of 5.7 …
Observation Of Zz Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Observation Of Zz Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Kenneth Bloom Publications
We present an observation for ZZ → ℓ+ ℓ-ℓ‘+ℓ‘- (ℓ, ℓ‘ = e or μ ) production in pp collisions at a center-of-mass energy of √s = 1.96 TeV. Using 1.7 fb-1 of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14+0.03 -0.02 events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ → ℓ+ ℓ-vv, yields a significance of 5.7 …
Zz → L+L-V+V- Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Zz → L+L-V+V- Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, D0 Collaboration
Kenneth Bloom Publications
We describe a search for Z boson pair production in pp collisions at √s = 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider using a data sample corresponding to an integrated luminosity of 2.7 fb-1. Using the final state decay ZZ → ℓ+ ℓ-v+v- (where ℓ = e or μ) we find a signal with a 2.6 standard deviations significance (2.0 expected) corresponding to a cross section of σ(pp → ZZ + X) = 2.01 ± 0.93(stat) ± 0.29(sys) pb.
Search For Long-Lived Particles Decaying Into Electron Or Photon Pairs With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Long-Lived Particles Decaying Into Electron Or Photon Pairs With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
In this Letter we report on a search for long-lived particles that decay into final states with two electrons or photons. Such long-lived particles arise in a variety of theoretical models, such as hidden valleys and supersymmetry with gauge-mediated breaking. By precisely reconstructing the direction of the electromagnetic shower we are able to probe much longer lifetimes than previously explored. We see no evidence of the existence of such long-lived particles and interpret this search as a quasi model-independent limit on their production cross section, as well as a limit on a long-lived fourth generation quark.
Search For Scalar Leptoquarks And T-Odd Quarks In The Acoplanar Jet Topology Using 2.5 Fb−1 Of Pp Collision Data At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Scalar Leptoquarks And T-Odd Quarks In The Acoplanar Jet Topology Using 2.5 Fb−1 Of Pp Collision Data At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
A search for new physics in the acoplanar jet topology has been performed in 2.5 fb−1 of data from pp collisions at √s = 1.96 TeV, recorded by the DØ detector at the Fermilab Tevatron Collider. The numbers of events with exactly two acoplanar jets and missing transverse energy are in good agreement with the Standard Model expectations. The result of this search has been used to set a lower mass limit of 205 GeV at the 95% C.L. on the mass of a scalar leptoquark when this particle decays exclusively into a quark and a neutrino. In the …
Search For Pair Production Of Doubly Charged Higgs Bosons In The H++H-- → Μ+Μ+Μ-Μ- Final State, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Pair Production Of Doubly Charged Higgs Bosons In The H++H-- → Μ+Μ+Μ-Μ- Final State, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We report the results of a search for pair production of doubly charged Higgs bosons via pp → H++H--X → μ+μ+μ-μ-X at √s = 1.96 TeV.We use a data set corresponding to an integrated luminosity of 1.1 fb-1 collected from 2002 to 2006 by the D0 detector at the Fermilab Tevatron Collider. In the absence of an excess above the standard model background, lower mass limits of M(H±±L) > 150 GeV/c2 and M(H±±R) > 127 GeV/c2 …
Search For Higgs Bosons Decaying To Tau Pairs In Pp Collisions With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Higgs Bosons Decaying To Tau Pairs In Pp Collisions With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We present a search for the production of neutral Higgs bosons φ decaying into τ+ τ- final states in pp collisions at a center-of-mass energy of 1.96 TeV. The data, corresponding to an integrated luminosity of approximately 1 fb-1, were collected by the D0 experiment at the Fermilab Tevatron Collider. Limits on the production cross section times branching ratio are set. The results are interpreted in the minimal supersymmetric standard model yielding limits that are the most stringent to date at hadron colliders.
Measurement Of The Inclusive Jet Cross Section In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Measurement Of The Inclusive Jet Cross Section In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We report on a measurement of the inclusive jet cross section in pp collisions at a center-of-mass energy √s = 1.96 TeV using data collected by the D0 experiment at the Fermilab Tevatron Collider corresponding to an integrated luminosity of 0.70 fb-1. The data cover jet transverse momenta from 50 to 600 GeV and jet rapidities in the range -2.4 to 2.4. Detailed studies of correlations between systematic uncertainties in transverse momentum and rapidity are presented, and the cross section measurements are found to be in good agreement with next-to-leading order QCD calculations.
Search For Decay Of A Fermiophobic Higgs Boson HƑ→ Γγ With The D0 Detector At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Decay Of A Fermiophobic Higgs Boson HƑ→ Γγ With The D0 Detector At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We report the results of a search for a narrow resonance decaying into two photons in 1.1 fb-1 of data collected by the D0 experiment at the Fermilab Tevatron Collider during the period 2002–2006. We find no evidence for such a resonance and set a lower limit on the mass of a fermiophobic Higgs boson of mhƒ > 100 GeV at the 95% C.L. This exclusion limit exceeds those obtained in previous searches at the Fermilab Tevatron and covers a significant region of the parameter space B(hƒ→ γγ) vs mhƒ which was not …
Search For Tt Resonances In The Lepton Plus Jets Final State In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Tt Resonances In The Lepton Plus Jets Final State In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We present a search for a narrow-width heavy resonance decaying into top quark pairs (X →tt) in p p collisions at √s = 1.96 TeV using approximately 0.9 fb−1 of data collected with the DØ detector at the Fermilab Tevatron Collider. This analysis considers tt candidate events in the lepton plus jets channel with at least one identified b jet and uses the tt invariant mass distribution to search for evidence of resonant production. We find no evidence for a narrow resonance X decaying to tt. Therefore, we set upper limits on σX • …
Observation Of The BC Meson In The Exclusive Decay BC → J/Ψπ, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Observation Of The BC Meson In The Exclusive Decay BC → J/Ψπ, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
A fully reconstructed Bc → J/ψπ signal is observed with the D0 detector at the Fermilab Tevatron pp collider using 1.3 fb-1 of integrated luminosity. The signal consists of 54 ± 12 candidates with a significance that exceeds 5 standard deviations, and confirms earlier observations of this decay. The measured mass of the Bc meson is 6300 ± 14(stat) ± 5(syst) MeV/c2.
Search For Large Extra Dimensions Via Single Photon Plus Missing Energy Final States At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Large Extra Dimensions Via Single Photon Plus Missing Energy Final States At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We report on a search for large extra dimensions in a data sample of approximately 1 fb-1 of pp collisions at √s = 1.96 TeV.We investigate Kaluza-Klein graviton production with a photon and missing transverse energy in the final state. At the 95% C.L. we set limits on the fundamental mass scale MD from 884 to 778 GeV for two to eight extra dimensions.
Evidence For Production Of Single Top Quarks, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Evidence For Production Of Single Top Quarks, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We present first evidence for the production of single top quarks in the D0 detector at the Fermilab Tevatron pp collider. The standard model predicts that the electroweak interaction can produce a top quark together with an anti-bottom quark or light quark, without the antiparticle top-quark partner that is always produced from strong-coupling processes. Top quarks were first observed in pair production in 1995, and since then, single top-quark production has been searched for in ever larger data sets. In this analysis, we select events from a 0.9 fb-1 data set that have an electron or muon and missing …
Measurement Of The Differential Cross Section For The Production Of An Isolated Photon With Associated Jet In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Measurement Of The Differential Cross Section For The Production Of An Isolated Photon With Associated Jet In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
The process pp → γ + jet + X is studied using 1.0 fb−1 of data collected by the D0 detector at the Fermilab Tevatron pp collider at a center-of-mass energy √s = 1.96 TeV. Photons are reconstructed in the central rapidity region |yγ | < 1.0 with transverse momenta in the range 30 < pγT < 400 GeV while jets are reconstructed in either the central |yjet| < 0.8 or forward 1.5 < |yjet| < 2.5 rapidity intervals with pjetT > 15 GeV. The differential cross section d3σ/dpγT dyγ dyjet is measured as a function of pγT in four regions, differing by the relative orientations of the photon and the jet in rapidity. …
Measurement Of The Ratio Of The Pp → W+C-Jet Cross Section To The Inclusive P¯P → W+Jets Cross Section, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Ratio Of The Pp → W+C-Jet Cross Section To The Inclusive P¯P → W+Jets Cross Section, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a measurement of the fraction of inclusive W+jets events produced with net charm quantum number ±1, denoted W+c-jet, in pp collisions at √s = 1.96 TeV using approximately 1 fb-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. We identify the W+jets events via the leptonic W boson decays. Candidate W+c-jet events are selected by requiring a jet containing a muon in association with a reconstructed W boson and exploiting the charge correlation between this muon and W boson decay lepton to perform a nearly model-independent background subtraction. We …
Search For Scalar Neutrino Superpartners In E + Μ Final States In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Search For Scalar Neutrino Superpartners In E + Μ Final States In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We report a search for R-parity-violating production and decay of sneutrino particles in the e μ final state with 1.04 ± 0.06 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider in 2002–2006. Good agreement between the data and the standard model prediction is observed. With no evidence for new physics, we set limits on the R-parity-violating couplings λ′ 311 and λ 312 as a function of the sneutrino mass.
First Study Of The Radiation-Amplitude Zero In W Γ Production And Limits On Anomalous Ww Γ Couplings At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
First Study Of The Radiation-Amplitude Zero In W Γ Production And Limits On Anomalous Ww Γ Couplings At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, Dø Collaboration
Kenneth Bloom Publications
We present results from a study of pp → W γ + X events utilizing data corresponding to 0.7 fb-1 of integrated luminosity at √s = 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. We set limits on anomalous WWγ couplings at the 95% C.L. The one-dimensional 95% C.L. limits are 0.49< κ γ < 1.51 and -0.12< λ γ < 0.13. We make the first study of the charge-signed rapidity difference between the lepton and the photon and find it to be indicative of the standard model radiation-amplitude zero in the Wγ system.
Search For Scalar Top Quarks In The Acoplanar Charm Jets And Missing Transverse Energy Final State In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Scalar Top Quarks In The Acoplanar Charm Jets And Missing Transverse Energy Final State In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for the pair production of scalar top quarks, t, using 995 pb−1 of data collected in pp collisions with the DØ detector at the Fermilab Tevatron Collider at √s = 1.96 TeV. Both scalar top quarks are assumed to decay into a charm quark and a neutralino (χ01), where χ01is the lightest supersymmetric particle. This leads to a final state with two acoplanar charm jets and missing transverse energy. We find the yield of such events to be consistent with the standard model expectation, and exclude sets of …
Study Of Direct Cp Violation In B± → J/ΨK±(Π±) Decays, V. M. Abazov, Gregory R. Snow, Kenneth A. Bloom, D0 Collaboration
Study Of Direct Cp Violation In B± → J/ΨK±(Π±) Decays, V. M. Abazov, Gregory R. Snow, Kenneth A. Bloom, D0 Collaboration
Kenneth Bloom Publications
We present a search for direct CP violation in B±→J/ψK±(π±) decays. The event sample is selected from 2.8 fb-1 of pp collisions recorded by D0 experiment in run II of the Fermilab Tevatron Collider. The charge asymmetry ACP(B+→J/ψK+) =+0.0075 ±± 0.0061(stat) ± 0.0030(syst) is obtained using a sample of approximately 40 000 B±→J/ψK±decays. The achieved precision is of the same level as the expected deviation predicted by some extensions of the standard model. …
Search For W′ Boson Resonances Decaying To A Top Quark And A Bottom Quark, V. M. Abazov, Gregory R. Snow, Kenneth A. Bloom, D0 Collaboration
Search For W′ Boson Resonances Decaying To A Top Quark And A Bottom Quark, V. M. Abazov, Gregory R. Snow, Kenneth A. Bloom, D0 Collaboration
Kenneth Bloom Publications
We search for the production of a heavy W′ gauge boson that decays to third generation quarks in 0.9 fb-1 of pp collisions at √s = 1.96 TeV, collected with the D0 detector at the Fermilab Tevatron collider. We find no significant excess in the final-state invariant mass distribution and set upper limits on the production cross section times branching fraction. For a left-handed W′ boson with SM couplings, we set a lower mass limit of 731 GeV. For right-handed W′ bosons, we set lower mass limits of 739 GeV if the W′ boson …