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Full-Text Articles in Physics
Evidence For The Decay BS0 → DS(*)DS(*) And A Measurement Of ΔγSCp/ΓS, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Evidence For The Decay BS0 → DS(*)DS(*) And A Measurement Of ΔγSCp/ΓS, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We search for the semi-inclusive process Bs0 → Ds(*)Ds(*) using 2.8 fb-1 of pp collisions at √s = 1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider.We observe 26.6 ± 8.4 signal events with a significance above background of 3.2 standard deviations yielding a branching ratio of B(bs0 → Ds(*)Ds(*) = 0.035 ± 0.010(stat.) ± 0.011 (syst.). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the Bs0 decays resulting in a width …
Search For Anomalous Top-Quark Couplings With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Anomalous Top-Quark Couplings With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
Anomalous Wtb couplings modify the angular correlations of the top-quark decay products and change the single top-quark production cross section. We present limits on anomalous top-quark couplings by combining information from W boson helicity measurements in top-quark decays and anomalous coupling searches in the single top-quark final state. We set limits on right-handed vector couplings as well as left-handed and right-handed tensor couplings based on about 1 fb-1 of data collected by the D0 experiment.
Measurement Of The Lifetime Of The BC± Meson In The Semileptonic Decay Channel, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Lifetime Of The BC± Meson In The Semileptonic Decay Channel, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
Using approximately 1.3 fb-1 of data collected by the D0 detector between 2002 and 2006, we measure the lifetime of the Bc± meson in the Bc± → J/ψμ± + X final state. A simultaneous unbinned likelihood fit to the J/ψ + μ invariant mass and lifetime distributions yields a signal of 881 ± 80(stat) candidates and a lifetime measurement of τ(Bc±) = 0.448-0.036+0.038(stat) ± 0.032(syst) ps.
Measurement Of The Semileptonic Branching Ratio Of BS0 To An Orbitally Excited DS** State: Br(BS0 → DS1-(2536) Μ +Νx), V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Semileptonic Branching Ratio Of BS0 To An Orbitally Excited DS** State: Br(BS0 → DS1-(2536) Μ +Νx), V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
In a data sample of approximately 1.3 fb-1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state Ds1±(2536) has been observed with a measured mass of 2535.7 ± 0.6(stat) ± 0.5(syst) MeV=c2 via the decay mode Bs0 → Ds1-(2536)μ+νμX. A first measurement is made of the branching ratio product Br(b → Ds1-(2536) μ + μ+νμX) x Br(Ds1- → D*-KS0). Assuming that Ds1 …
Search For Associated W And Higgs Boson Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Associated W And Higgs Boson Production In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present results of a search for WH → ℓνbb production in pp collisions based on the analysis of 1.05 fb-1 of data collected by the D0 experiment at the Fermilab Tevatron, using a neural network for separating the signal from backgrounds. No signal-like excess is observed, and we set 95% C.L. upper limits on the WH production cross section multiplied by the branching ratio for H → bb for Higgs boson masses between 100 and 150 GeV. For a mass of 115 GeV, we obtain an observed (expected) limit of 1.5 (1.4) pb, a factor of 11.4 …
Search For Large Extra Spatial Dimensions In The Dielectron And Diphoton Channels In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Large Extra Spatial Dimensions In The Dielectron And Diphoton Channels In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We report on a search for large extra spatial dimensions in the dielectron and diphoton channels using a data sample of 1.05 fb-1 of pp collisions at a center-of-mass energy of 1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider. The invariant mass spectrum of the data agrees well with the prediction of the standard model. We find the most restrictive 95% C.L. lower limits on the effective Planck scale between 2.1 and 1.3 TeV for 2 to 7 extra dimensions.
Search For Neutral Higgs Bosons At High Tanβ In The B(H/H/A) → BΤ+ Τ- Channel, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Neutral Higgs Bosons At High Tanβ In The B(H/H/A) → BΤ+ Τ- Channel, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
The first search in pp collisions at √s = 1.96 TeV TeV for the production of neutral Higgs bosons in association with bottom quarks and decaying in two tau leptons is presented. The cross section for this process is enhanced in many extensions of the standard model, such as its minimal supersymmetric extension (MSSM) at large tanβ. The data, corresponding to an integrated luminosity of 328 pb-1, were collected with the D0 detector at the Fermilab Tevatron Collider. An upper limit is set on the production cross section of neutral Higgs bosons in the mass range of …
Measurement Of The Angular And Lifetime Parameters Of The Decays BD0 → J/ΨK*0 And BS0 → J/Φψ, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The Angular And Lifetime Parameters Of The Decays BD0 → J/ΨK*0 And BS0 → J/Φψ, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present measurements of the linear polarization amplitudes and the strong relative phases that describe the flavor-untagged decays Bd0 → J/ψK+0 and Bs0 → J/ψφ in the transversity basis. We also measure the mean lifetime τs of the Bd0 mass eigenstates and the lifetime ratio τs/τd. The analyses are based on approximately 2.8 fb-1 of data recorded with the D0 detector. From our measurements of the angular parameters we conclude that there is no evidence for a deviation from flavor SU(3) symmetry for these …
Search For The Lightest Scalar Top Quark In Events With Two Leptons In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For The Lightest Scalar Top Quark In Events With Two Leptons In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We report results of a search for the pair production of the lightest supersymmetric partner of the top quark, t1, using a data set corresponding to an integrated luminosity of 1 fb−1 collected by the DØ detector at a pp center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider. Both scalar top quarks are assumed to decay into a b quark, a charged lepton and a scalar neutrino. The search is performed in the electron plus muon and dielectron final states. The signal topology consists of two isolated leptons, missing transverse energy, and jets. We find …
Measurement Of The Top Quark Mass In Final States With Two Leptons, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of The Top Quark Mass In Final States With Two Leptons, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present measurements of the top quark mass (mt) in tt candidate events with two final state leptons using 1 fb-1 of data collected by the D0 experiment. Our data sample is selected by requiring two fully identified leptons or by relaxing one lepton requirement to an isolated track if at least one jet is tagged as a b jet. The top quark mass is extracted after reconstructing the event kinematics under the tt hypothesis using two methods. In the first method, we integrate over expected neutrino rapidity distributions, and in the second we calculate a …
Determination Of The Strong Coupling Constant From The Inclusive Jet Cross Section In Pp Collisions At √S= 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Determination Of The Strong Coupling Constant From The Inclusive Jet Cross Section In Pp Collisions At √S= 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We determine the strong coupling constant αs and its energy dependence from the pT dependence of the inclusive jet cross section in pp collisions at √s= 1.96 TeV. The strong coupling constant is determined over the transverse momentum range 50<pT < 145 GeV. Using perturbative QCD calculations to order O(αs3) combined with O(αs4) contributions from threshold corrections, we obtain αs(MZ) =0.1161-0.0048+0.0041. This is the most precise result obtained at a hadron-hadron collider.
Measurement Of The Ww Production Cross Section With Dilepton Final States In Pp Collisions At √S = 1.96 Tev And Limits On Anomalous Trilinear Gauge Couplings, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of The Ww Production Cross Section With Dilepton Final States In Pp Collisions At √S = 1.96 Tev And Limits On Anomalous Trilinear Gauge Couplings, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We provide the most precise measurement of the WW production cross section in pp collisions to date at a center of mass energy of 1.96 TeV, and set limits on the associated trilinear gauge couplings. The WW → ℓνℓ’ν(ℓ,ℓ’ = e, μ) decay channels are analyzed in 1 fb-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. The measured cross section is σ(pp → WW) = 11.5 ± 2.1 (stat + syst) ± 0.7 (lumi) pb. One- and two-dimensional 95% C.L. limits on trilinear gauge couplings are provided.
Measurement Of Dijet Angular Distributions At √S = 1.96 Tev And Searches For Quark Compositeness And Extra Spatial Dimensions, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of Dijet Angular Distributions At √S = 1.96 Tev And Searches For Quark Compositeness And Extra Spatial Dimensions, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present the first measurement of dijet angular distributions in pp collisions at √s = 1.96 TeV at the Fermilab Tevatron Collider. The measurement is based on a dataset corresponding to an integrated luminosity of 0:7 fb-1 collected with the D0 detector. Dijet angular distributions have been measured over a range of dijet masses, from 0.25 TeV to above 1.1 TeV. The data are in good agreement with the predictions of perturbative QCD and are used to constrain new physics models including quark compositeness, large extra dimensions, and TeV-1 scale extra dimensions. For all models considered, we …
Combination Of Tt Cross Section Measurements And Constraints On The Mass Of The Top Quark And Its Decays Into Charged Higgs Bosons, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Combination Of Tt Cross Section Measurements And Constraints On The Mass Of The Top Quark And Its Decays Into Charged Higgs Bosons, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We combine measurements of the top quark pair production cross section in pp collisions in the ℓ + jets, ℓℓ, and τℓ final states (where ℓ is an electron or muon) at a center of mass energy of √s = 1.96 TeV in 1 fb-1 of data collected with the D0 detector. For a top quark mass of 170 GeV/c2, we obtain σtt = 8.18-0.87+0.98 pb in agreement with the theoretical prediction. Based on predictions from higher order quantum chromodynamics, we extract a mass for the top quark from the combined tt …
Relative Rates Of B Meson Decays Into Ψ(2S) And J/Ψ Mesons, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Relative Rates Of B Meson Decays Into Ψ(2S) And J/Ψ Mesons, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We report on a study of the relative rates of B meson decays into ψ(2S) and J/ψ mesons using 1.3 fb-1 of pp collisions at √s = 1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We observe the channels B0s → ψ(2S)φ, B0s → J/ψφ, B± → ψ(2S)K±, and B± → i>J/ψK± and we measure the relative branching fractions for these channels to be (B(Bs0 → ψ(2 …
Search For Charged Higgs Bosons In Decays Of Top Quarks, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Charged Higgs Bosons In Decays Of Top Quarks, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for charged Higgs bosons in decays of top quarks, in the mass range 80 < mH± < 155 GeV, assuming the subsequent decay H+ → τ+vτ (and its charge conjugate). Using 0.9 fb-1 of lepton + jets data collected with the D0 detector at the Fermilab Tevatron pp collider, operating at a center of mass energy √s = 1.96 TeV, we find no evidence for a H± signal. Hence we exclude branching ratios B(t → H+b) > 0.24 for mH± = 80 GeV and B(t → H …
Direct Measurement Of The W Boson Width, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Direct Measurement Of The W Boson Width, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a direct measurement of the width of the W boson using the shape of the transverse mass distribution of W → ev candidate events. Data from approximately 1 fb-1 of integrated luminosity recorded at √s = 1.96 TeV by the D0 detector at the Fermilab Tevatron pp collider are analyzed. We use the same methods and data sample that were used for our recently published W boson mass measurement, except for the modeling of the recoil, which is done with a new method based on a recoil library. Our result, 2.028 ± 0.072 GeV, is in …
Direct Measurement Of The Mass Difference Between Top And Antitop Quarks, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Direct Measurement Of The Mass Difference Between Top And Antitop Quarks, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a measurement of the mass difference between t and t quarks in lepton + jets final states of tt events in 1 fb-1 of data collected with the D0 detector from Fermilab Tevatron Collider pp collisions at √s = 1.96 TeV. The measured mass difference of 3.8 ± 3.7 GeV is consistent with the equality of t and t masses. This is the first direct measurement of a mass difference between a quark and its antiquark partner.
Measurement Of The W Boson Mass, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The W Boson Mass, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a measurement of the W boson mass in W → ev decays using 1 fb-1 of data collected with the D0 detector during Run II of the Fermilab Tevatron collider. With a sample of 499830 W → ev candidate events, we measure MW = 80.401 ± 0.043 GeV. This is the most precise measurement from a single experiment.
Observation Of Single Top-Quark Production, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Observation Of Single Top-Quark Production, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We report observation of the electroweak production of single top quarks in pp collisions at √s = 1.96 TeV based on 2.3 fb-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure a cross section of σ(pp → tb + X, tqb + X) = 3.94 ± 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.5 x 10 …
Search For Long-Lived Charged Massive Particles With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Long-Lived Charged Massive Particles With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We search for long-lived charged massive particles using 1.1 fb-1 of data collected by the D0 detector at the Fermilab Tevatron pp Collider. Time-of-flight information is used to search for pair produced long-lived tau sleptons, gauginolike charginos, and Higgsino-like charginos. We find no evidence of a signal and set 95% C.L. cross section upper limits for staus, which vary from 0.31 to 0.04 pb for stau masses between 60 and 300 GeV. We also set lower mass limits of 206 GeV (171 GeV) for pair produced charged gauginos (Higgsinos).
Search For Charged Higgs Bosons Decaying Into Top And Bottom Quarks In Pp Collisions, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Charged Higgs Bosons Decaying Into Top And Bottom Quarks In Pp Collisions, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We describe a search for production of a charged Higgs boson, qq’ → H+, reconstructed in the tb final state in the mass range 180 ≤ MH+ ≤ 300 GeV. The search was undertaken at the Fermilab Tevatron collider with a center-of-mass energy √s =1.96 TeV and uses 0.9 fb-1 of data collected with the D0 detector. We find no evidence for charged Higgs boson production and set upper limits on the production cross section in the types I, II, and III two-Higgs-doublet models (2HDMs). An excluded region in the (MH+ …
Measurement Of The ZΓ → Ννγ Production Cross Section And Limits On Anomalous ZzΓ And ZΓγ Couplings In Pp Collisions At √S= 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of The ZΓ → Ννγ Production Cross Section And Limits On Anomalous ZzΓ And ZΓγ Couplings In Pp Collisions At √S= 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present the first observation of the Zγ → ννγ process at the Fermilab Tevatron at 5.1 standard deviations significance, based on 3.6 fb-1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron pp Collider at √s = 1.96 TeV. The measured Zγ production cross section multiplied by the branching fraction of Z → νν is 32 ± 9(stat + syst) ± 2(lumi) fb for the photon ET > 90 GeV. It is in agreement with the standard model prediction of 39 ± 4 fb. We set limits on anomalous trilinear Zγγ …
Search For Resonant Diphoton Production With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Resonant Diphoton Production With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for a narrow resonance in the inclusive diphoton final state using ~2.7 fb-1 of data collected with the D0 detector at the Fermilab Tevatron pp Collider.We observe good agreement between the data and the background prediction, and set the first 95% C.L. upper limits on the production cross section times the branching ratio for decay into a pair of photons for resonance masses between 100 and 150 GeV. This search is also interpreted in the context of several models of electroweak symmetry breaking with a Higgs boson decaying into two photons.
Search For Dark Photons From Supersymmetric Hidden Valleys, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For Dark Photons From Supersymmetric Hidden Valleys, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We search for a new light gauge boson, a dark photon, with the D0 experiment. In the model we consider, supersymmetric partners are pair produced and cascade to the lightest neutralinos that can decay into the hidden sector state plus either a photon or a dark photon. The dark photon decays through its mixing with a photon into fermion pairs. We therefore investigate a previously unexplored final state that contains a photon, two spatially close leptons, and large missing transverse energy.We do not observe any evidence for dark photons and set a limit on their production.
Measurement Of Γ + B + X And Γ + C +X Production Cross Sections In Pp Collisions At √S = 1.96tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of Γ + B + X And Γ + C +X Production Cross Sections In Pp Collisions At √S = 1.96tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
First measurements of the differential cross sections d3σ/(d pTγ dyγ dyjet) for the inclusive production of a photon in association with a heavy quark (b, c) jet are presented, covering photon transverse momenta 30 < pTγ < 150 GeV, photon rapidities |yγ| < 1.0, jet rapidities |yjet| < 0.8, and jet transverse momenta pTjet > 15 GeV. The results are based on an integrated luminosity of 1 fb-1 in pp collisions at √s = 1.96 TeV recorded with the D0 detector at the Fermilab Tevatron Collider. The results are compared with next-to-leading order perturbative QCD predictions.
Search For Resonant Pair Production Of Neutral Long-Lived Particles Decaying To Bb In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Resonant Pair Production Of Neutral Long-Lived Particles Decaying To Bb In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We report on a first search for resonant pair production of neutral long-lived particles (NLLP) which each decay to a bb pair, using 3.6 fb-1 of data recorded with the D0 detector at the Fermilab Tevatron collider. We search for pairs of displaced vertices in the tracking detector at radii in the range 1.6–20 cm from the beam axis. No significant excess is observed above background, and upper limits are set on the production rate in a hidden-valley benchmark model for a range of Higgs boson masses and NLLP masses and lifetimes.
Search For The Standard Model Higgs Boson In Tau Final States, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Search For The Standard Model Higgs Boson In Tau Final States, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for the standard model Higgs boson using hadronically decaying tau leptons, in 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron pp collider. We select two final states: τ± plus missing transverse energy and b jets, and τ+τ- plus jets. These final states are sensitive to a combination of associated W/Z boson plus Higgs boson, vector boson fusion, and gluon-gluon fusion production processes. The observed ratio of the combined limit on the Higgs production cross section at the 95% C.L. to the standard model expectation is 29 …
Search For Next-To-Minimal Supersymmetric Higgs Bosons In The H → Aa → Μμμμ, Μμττ Channels Using Pp Collisions At √S = 1.96 Tev, V.M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Next-To-Minimal Supersymmetric Higgs Bosons In The H → Aa → Μμμμ, Μμττ Channels Using Pp Collisions At √S = 1.96 Tev, V.M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We report on a first search for production of the lightest neutral CP-even Higgs boson (h) in the next-to-minimal supersymmetric standard model, where h decays to a pair of neutral pseudoscalar Higgs bosons (a), using 4.2 fb-1 of data recorded with the D0 detector at Fermilab. The a bosons are required to either both decay to μ+μ- or one to μ+μ and the other to τ+τ. No significant signal is observed, and we set limits on its production as functions of Ma and Mh.
Measurement Of Trilinear Gauge Boson Couplings From Ww + Wz → Lvjj Events In Pp Collisions At √S= 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of Trilinear Gauge Boson Couplings From Ww + Wz → Lvjj Events In Pp Collisions At √S= 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present a direct measurement of trilinear gauge boson couplings at γWW and ZWW vertices in WW and WZ events produced in pp collisions at √s= 1.96 TeV. We consider events with one electron or muon, missing transverse energy, and at least two jets. The data were collected using the D0 detector and correspond to 1.1 fb-1 of integrated luminosity. Considering two different relations between the couplings at the γWW and ZWW vertices, we measure these couplings at 68% C.L. to be κγ = 1.07+0.26-0.29, λ = 0.00-0.06+0.06, …