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Full-Text Articles in Physics
Measurement Of The BS0 Lifetime Using Semileptonic Decays, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of The BS0 Lifetime Using Semileptonic Decays, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We report a measurement of the Bs0 lifetime in the semileptonic decay channel Bs0 → Ds- μ+νX (and its charge conjugate), using approximately 0.4 fb-1 of data collected with the D0 detector during 2002–2004. Using 5176 reconstructed Ds- μ+ signal events, we have measured the Bs0 lifetime to be τ(Bs0) = 1.398 ± 0.044(stat) -0.025+0.028(syst) ps. This is the most precise measurement of the Bs0 lifetime to date.
Measurement Of BD Mixing Using Opposite-Side Flavor Tagging, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Measurement Of BD Mixing Using Opposite-Side Flavor Tagging, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration
Kenneth Bloom Publications
We report on a measurement of the Bd0 mixing frequency and the calibration of an opposite-side flavor tagger in the D0 experiment. Various properties associated with the b quark on the opposite side of the reconstructed B meson are combined using a likelihood-ratio method into a single variable with enhanced tagging power. Its performance is tested with data, using a large sample of reconstructed semileptonic B → μD0X and B → μD*X decays, corresponding to an integrated luminosity of approximately 1 fb-1. The events are divided into groups depending on …
Measurement Of The Top Quark Mass In The Lepton +Jets Final State With The Matrix Element Method, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of The Top Quark Mass In The Lepton +Jets Final State With The Matrix Element Method, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present a measurement of the top quark mass with the matrix element method in the lepton +jets final state. As the energy scale for calorimeter jets represents the dominant source of systematic uncertainty, the matrix element likelihood is extended by an additional parameter, which is defined as a global multiplicative factor applied to the standard energy scale. The top quark mass is obtained from a fit that yields the combined statistical and systematic jet energy scale uncertainty. Using a data set of 0.4 fb-1 taken with the D0 experiment at Run II of the Fermilab Tevatron Collider, the …
Measurement Of The Cp-Violation Parameter Of B0 Mixing And Decay With Pp̅ → ΜμX Data, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Measurement Of The Cp-Violation Parameter Of B0 Mixing And Decay With Pp̅ → ΜμX Data, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We measure the dimuon charge asymmetry A in pp̅ collisions at a center of mass energy √s =1960 GeV. The data was recorded with the D0 detector and corresponds to an integrated luminosity of approximately 1:0 fb-1. Assuming that the asymmetry A is due to asymmetric B0 ↔ B̅ mixing and decay, we extract the CP-violation parameter of B0 mixing and decay: [ℜ(∊B0)]/[1+∣∊B0∣2 = (AB0)/4 = -0.0023 ± 0.0011 (stat) ± 0.0008(syst). AB0 is the dimuon charge asymmetry from decays of B …
Search For Pair Production Of Scalar Bottom Quarks In Pp̅ Collisions At √S =1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Pair Production Of Scalar Bottom Quarks In Pp̅ Collisions At √S =1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
A search for direct production of scalar bottom quarks (b̃) is performed with 310 pb-1 of data collected by the D0 experiment in pp̅ collisions at √s = 1.96 TeV at the Fermilab Tevatron Collider. The topology analyzed consists of two b jets and an imbalance in transverse momentum due to undetected neutralinos (χ̃10), with χ̃10 assumed to be the lightest supersymmetric particle. We find the data consistent with standard model expectations, and set a 95% C.L. exclusion domain in the (mb̃, m χ̃10) mass plane, …
Search For Neutral, Long-Lived Particles Decaying Into Two Muons In Pp̅ Collisions At √S = 1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Neutral, Long-Lived Particles Decaying Into Two Muons In Pp̅ Collisions At √S = 1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for a neutral particle, pair produced in pp̅ collisions at√s = 1.96 TeV, which decays into two muons and lives long enough to travel at least 5 cm before decaying. The analysis uses ≈ 380 pb-1 of data recorded with the D0 detector. The background is estimated to be about one event. No candidates are observed, and limits are set on the pair-production cross section times branching fraction into dimuons + X for such particles. For a mass of 10 GeVand lifetime of 4 × 10-11 s, we exclude values greater than 0.14 pb …
Search For The Standard Model Higgs Boson In The Pp̅→ Zh → Νν̅Bb̅ Channel, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For The Standard Model Higgs Boson In The Pp̅→ Zh → Νν̅Bb̅ Channel, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We report a search for the standard model (SM) Higgs boson based on data collected by the D0 experiment at the Fermilab Tevatron Collider, corresponding to an integrated luminosity of 260 pb-1. We study events with missing transverse energy and two acoplanar b jets, which provide sensitivity to the ZH production cross section in the νν̅bb̅ channel, and to WH production when the lepton from the W → ℓν decay is undetected. The data are consistent with the SM background expectation, and we set 95% C.L. upper limits on σ(pp̅ → ZH/WH) × …
Measurement Of The Inclusive Jet Cross Section In Pp̅ Interactions At √S = 1:96 Tev Using A Cone-Based Jet Algorithm, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Inclusive Jet Cross Section In Pp̅ Interactions At √S = 1:96 Tev Using A Cone-Based Jet Algorithm, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We present a measurement of the inclusive jet cross section in pp̅ interactions at √s = 1:96 TeV using 385 pb-1 of data collected with the CDF II detector at the Fermilab Tevatron. The results are obtained using an improved cone-based jet algorithm (Midpoint). The data cover the jet transverse momentum range from 61 to 620 GeV/c, extending the reach by almost 150 GeV/c compared with previous measurements at the Tevatron. The results are in good agreement with next-to-leading order perturbative QCD predictions using the CTEQ6.1M parton distribution functions.
Search For Associated Higgs Boson Production Wh → Www*→ L±ΝL′±Ν′ +X In Pp̅ Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Associated Higgs Boson Production Wh → Www*→ L±ΝL′±Ν′ +X In Pp̅ Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for associated Higgs boson production in the process pp̅ → WH → WWW*→ l±νl′±ν′ +X in final states containing two like-sign isolated electrons or muons (ℯ±ℯ±, ℯ±μ±, or μ±μ±). The search is based on D0 run II data samples corresponding to integrated luminosities of 360–380 pb-1. No excess is observed over the predicted standard model background. We set 95% C.L. upper limits on σ(pp̅→WH) × (Br(H→ WW …
Search For Neutral Higgs Bosons Decaying To Tau Pairs In Pp̅ Collisions At √S = 1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Neutral Higgs Bosons Decaying To Tau Pairs In Pp̅ Collisions At √S = 1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
A search for the production of neutral Higgs bosons Φ decaying into τ+τ- final states in pp̅ collisions at a center-of-mass energy of 1.96 TeV is presented. The data, corresponding to an integrated luminosity of approximately 325 pb-1, were collected by the D0 experiment at the Fermilab Tevatron Collider. Since no excess compared to the expectation from standard model processes is found, limits on the production cross section times branching ratio are set. The results are combined with those obtained from the D0 search for Φb(b̅) →bb̅b( …
Search For Resonant Second Generation Slepton Production At The Fermilab Tevatron, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Resonant Second Generation Slepton Production At The Fermilab Tevatron, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for supersymmetry in the R-parity violating resonant production and decay of smuons and muon sneutrinos in the channels μ̃→ χ̃10μ, μ̃→ χ̃2,3,40μ, and ν̃μ→ χ̃1,2±μ. We analyzed 0:38 fb-1 of integrated luminosity collected between April 2002 and August 2004 with the D0 detector at the Fermilab Tevatron Collider. The observed number of events is in agreement with the standard model expectation, and we calculate 95% C.L. limits on the slepton production cross section times branching fraction to gaugino plus muon, as a function …
Publisher’S Note: Limits On Anomalous Trilinear Gauge Couplings From Ww → ℯ+ ℯ-, Ww → ℯ±Μ±, And Ww → Μ+Μ- Events From Pp̅ Collisions At √S = 1.96 Tev [Phys. Rev. D 74, 057101 (2006)], V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Publisher’S Note: Limits On Anomalous Trilinear Gauge Couplings From Ww → ℯ+ ℯ-, Ww → ℯ±Μ±, And Ww → Μ+Μ- Events From Pp̅ Collisions At √S = 1.96 Tev [Phys. Rev. D 74, 057101 (2006)], V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
This paper was published online on 8 September 2006 with a typographical error in the title. The title should read as ‘‘Limits on anomalous trilinear gauge couplings from WW → ℯ+ ℯ-, WW → ℯ±μ±, and WW → μ+μ- events from pp̅ collisions at √s =1:96 TeV’’. The title has been corrected as of 14 September 2006. The title is correct in the printed version of the journal.
Limits On Anomalous Trilinear Gauge Couplings From Ww → E+E-, Ww → E± Μ±, And Ww → Μ+ Μ- Events From Pp̅ Collisions At √S =1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Limits On Anomalous Trilinear Gauge Couplings From Ww → E+E-, Ww → E± Μ±, And Ww → Μ+ Μ- Events From Pp̅ Collisions At √S =1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
Limits are set on anomalous WWγ and WWZ trilinear gauge couplings using W+W- →e+vee-v̅e, W+W- →e±ve μ±v μ, and W+W- → μ+v μ μ-v̅ μ events. The data set was collected by the Run II D0 detector at the Fermilab Tevatron Collider and corresponds to approximately 250 pb-1 of integrated luminosity at √s = 1.96 TeV. Under the assumption that the WWγ couplings are equal to the WWZ …
Search For The Rare Decay BS0 → Φμ+ Μ- With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For The Rare Decay BS0 → Φμ+ Μ- With The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present a search for the flavor-changing neutral current decay Bs0 → φμ+μ- using about 0.45 fb-1 of data collected in pp̅ collisions at √s = 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. We find an upper limit on the branching ratio of this decay normalized to Bs0 → J/ ψφ of [Ɓ(Bs0 → φμ+μ-)] ÷ [Ɓ(Bs0 →J/ ψφ )]< 4.4 × 10-3 at the 95% C.L. Using the central value of the world average branching fraction …
Direct Limits On The BS0 Oscillation Frequency, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Direct Limits On The BS0 Oscillation Frequency, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We report results of a study of the Bs0 oscillation frequency using a large sample of Bs0 semileptonic decays corresponding to approximately 1 fb-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider in 2002–2006. The amplitude method gives a lower limit on the Bs0 oscillation frequency at 14.8 ps-1 at the 95% C.L. At Δms = 19 ps-1, the amplitude deviates from the hypothesis A= 0 (1) by 2.5 (1.6) standard deviations, corresponding to a two-sided C.L. of 1% (10%). A likelihood …
Search For A Heavy Resonance Decaying Into A Z+ Jet Final State In Pp̅ Collisions At √S =1:96 Tev Using The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For A Heavy Resonance Decaying Into A Z+ Jet Final State In Pp̅ Collisions At √S =1:96 Tev Using The D0 Detector, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We have searched for a heavy resonance decaying into a Z+ jet final state in pp̅ collisions at a center of mass energy of 1:96 TeV at the Fermilab Tevatron collider using the D0 detector. No indication for such a resonance was found in a data sample corresponding to an integrated luminosity of 370 pb-1. We set upper limits on the cross section times branching fraction for heavy resonance production at the 95% C.L. as a function of the resonance mass and width. The limits are interpreted within the framework of a specific model of excited quark …
Measurement Of The Helicity Of W Bosons In Top-Quark Decays, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Helicity Of W Bosons In Top-Quark Decays, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We measure the branching fraction of the top quark to longitudinally and right-handed polarized W bosons, F0 and F+, using approximately 200 pb-1 of p̅p collisions collected by the CDF II detector. We analyze two quantities sensitive to the W helicity: the invariant mass of the charged lepton and the bottom quark jet in the decay t → Wb → ℓνb (where ℓ = ℯ or μ), and the transverse momentum of the charged lepton. Constrained fits yield F0 = 0.7̅4̅-0.34+0.22, and F+ < 0.2̅7̅ at the 95% confidence level. These measurements are consistent with the standard model predictions.
Search For Excited Muons In Pp̅ Collisions At √S = 1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Search For Excited Muons In Pp̅ Collisions At √S = 1:96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory R. Snow, D0 Collaboration
Kenneth Bloom Publications
We present the results of a search for the production of an excited state of the muon, μ*, in proton antiproton collisions at √s = 1:96 TeV. The data have been collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately 380 pb-1. We search for μ* in the process pp̅ → μ*μ, with the μ* subsequently decaying to a muon plus photon. No excess above the standard model expectation is observed in data. Interpreting our data in the context of a model that …
Measurement Of Bottom-Quark Hadron Masses In Exclusive J/Ψ Decays With The Cdf Detector, Darin Acosta, Kenneth A. Bloom, Cdf Collaboration
Measurement Of Bottom-Quark Hadron Masses In Exclusive J/Ψ Decays With The Cdf Detector, Darin Acosta, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We measure the masses of b hadrons in exclusively reconstructed final states containing a J/ ψ →μ-μ+ decay using 220 pb-1 of data collected by the CDF II experiment. We find: m(B+) = 5279.10 ± 0.41(stat.) ± 0.36(sys.) MeV/c2, m(B0) ± 5279.63 ± 0.53(stat.) ± 0.33(sys.) MeV/c2, m(Bs0) = 5366.01 ± 0.73(stat.) ± 0.33(sys.) MeV/c2, m(Λb0) = 5619.7 ± 1.2(stat.) ± 1.2 …
Measurement Of The Tt̅ Production Cross Section In Pp̅ Collisions At √S = 1.96 Tev Using MissingET+ Jets Events With Secondary Vertex B Tagging, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Tt̅ Production Cross Section In Pp̅ Collisions At √S = 1.96 Tev Using MissingET+ Jets Events With Secondary Vertex B Tagging, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We present a measurement of the tt̅ production cross section in pp̅ collisions at √s = 1.96 TeV which uses events with an inclusive signature of significant missing transverse energy and jets. This is the first measurement which makes no explicit lepton identification requirements, so that sensitivity to W → τν decays is maintained. Heavy flavor jets from top quark decay are identified with a secondary vertex tagging algorithm. From 311 pb-1 of data collected by the Collider Detector at Fermilab, we measure a production cross section of 5.8 ±1.2(stat) -0.7+0.9(syst) pb for a top quark mass …
Direct Search For Dirac Magnetic Monopoles In Pp̅ Collisions At P√S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Direct Search For Dirac Magnetic Monopoles In Pp̅ Collisions At P√S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We search for pair-produced Dirac magnetic monopoles in 35:7 pb-1 of proton-antiproton collisions at √s = 1:96 TeV with the Collider Detector at Fermilab (CDF). We find no monopole candidates corresponding to a 95% confidence-level cross-section limit σ c2. Assuming a Drell-Yan pair-production mechanism, we set a mass limit m>360 GeV/c2.
Measurement Of The Ratios Of Branching Fractions Ɓ(BS0 → DS-Π+)/ Ɓ(B0 → D- Π+) And Ɓ(B+ →D0 Π+)/ Ɓ(B0 → D- Π+), A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Ratios Of Branching Fractions Ɓ(BS0 → DS-Π+)/ Ɓ(B0 → D- Π+) And Ɓ(B+ →D0 Π+)/ Ɓ(B0 → D- Π+), A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We report an observation of the decay Bs0 → Ds-π+ in pp̅ collisions at √s = 1.96 TeV using 115 pb-1 of data collected by the CDF II detector at the Fermilab Tevatron. We observe 83 ± 11(stat) Bs0 → Ds -π+ candidates, representing a large increase in statistics over previous measurements and the first observation of this decay at a pp̅ collider. We present the first measurement of the relative branching fraction Ɓ(Bs0 → Ds-π+)/ Ɓ(B0 → …
Measurement Of The Top Quark Mass With The Dynamical Likelihood Method Using Lepton Plus Jets Events With B-Tags In Pp̅ Collisions At √S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Top Quark Mass With The Dynamical Likelihood Method Using Lepton Plus Jets Events With B-Tags In Pp̅ Collisions At √S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
This paper describes a measurement of the top quark mass, Mtop, with the dynamical likelihood method (DLM) using the CDF II detector at the Fermilab Tevatron. The Tevatron produces top/antitop (tt̅) pairs in pp̅ collisions at a center-of-mass energy of 1.96 TeV. The data sample used in this analysis was accumulated from March 2002 through August 2004, which corresponds to an integrated luminosity of 318 pb-1. We use the tt̅ candidates in the ‘‘lepton + jets’’ decay channel, requiring at least one jet identified as a b quark by finding a displaced secondary vertex. …
Search For Scalar Bottom Quarks From Gluino Decays In P̅P Collisions At √S = 1.96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Search For Scalar Bottom Quarks From Gluino Decays In P̅P Collisions At √S = 1.96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We searched for scalar bottom quarks in 156 pb-1 of p̅p collisions at √s = 1.96 TeV recorded by the Collider Detector at Fermilab II experiment at the Tevatron. Scalar bottom quarks can be produced from gluino decays in R-parity conserving models of super-symmetry when the mass of the gluino exceeds that of the scalar bottom quark. Then, a scalar bottom quark can decay into a bottom quark and a neutralino. To search for this scenario, we investigated events with large missing transverse energy and at least three jets, two or more of which were identified as containing …
Top-Quark Mass Measurement From Dilepton Events At Cdf Ii, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Top-Quark Mass Measurement From Dilepton Events At Cdf Ii, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We report a measurement of the top-quark mass using events collected by the CDF II detector from pp̅ collisions at √s = 1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt̅ → b̅ℓ-ν̅ℓbℓ′+ν′ℓ decays. The likelihood is formed as the convolution of the leading-order matrix element and detector resolution functions. The joint likelihood is the product of likelihoods for each of 33 events collected in 340 pb-1 of integrated luminosity, yielding a top-quark mass Mt …
Measurement Of The Inclusive Jet Cross Section Using The KT Algorithm In Pp̅ Collisions At √S = 1.96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Inclusive Jet Cross Section Using The KT Algorithm In Pp̅ Collisions At √S = 1.96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We report on a measurement of the inclusive jet production cross section as a function of the jet transverse momentum in pp̅ collisions at √s = 1.96 TeV using data collected with the upgraded Collider Detector at Fermilab in run II, corresponding to an integrated luminosity of 385 pb-1. The measurement is carried out for jets with rapidity 0.1 <∣yjet∣ < 0.7 and transverse momentum in the range 54<pTjet < 700 GeV/c. Next-to-leading order perturbative QCD predictions are in good agreement with the measured cross section after the necessary nonperturbative parton-to-hadron corrections are included.
Measurement Of The Dipion Mass Spectrum In X(3872) → J/Ψπ+Π- Decays, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Measurement Of The Dipion Mass Spectrum In X(3872) → J/Ψπ+Π- Decays, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We measure the dipion mass spectrum in X(3872) → J/ψ π + π - decays using 360 pb-1 of p̅p collisions at √s = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (3S1, 1P1, and 3DJ) charmonia decaying to J/ π + π -, as well as even C-parity states in which the pions are from ρ0 decay. The latter case also encompasses exotic interpretations, such as a D0D̅*0 molecule. …
Evidence For The Exclusive Decay BC± → J/Ψπ± And Measurement Of The Mass Of The BC± Meson, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Evidence For The Exclusive Decay BC± → J/Ψπ± And Measurement Of The Mass Of The BC± Meson, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We report the first evidence for a fully reconstructed decay mode of the Bc± meson in the channel Bc± → J/ψπ±, with J/ψ → μ+ μ-. The analysis is based on an integrated luminosity of 360 pb-1 in pp̅ collisions at 1.96 TeV center of mass energy collected by the Collider Detector at Fermilab. We observe 14.6 ± 4.6 signal events with a background of 7.1 ± 0.9 events, and a fit to the J/ ψπ± mass spectrum yields a Bc± mass of 6285.7 …
Search For Higgs Bosons Decaying To Bb̅ And Produced In Association With W Bosons In Pp̅ Collisions At √S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Search For Higgs Bosons Decaying To Bb̅ And Produced In Association With W Bosons In Pp̅ Collisions At √S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
We present a search for Higgs bosons decaying into bb̅ and produced in association with W bosons in pp̅ collisions at √s = 1.96 TeV. This search uses 320 pb-1 of the data set accumulated by the upgraded Collider Detector at Fermilab. Events are selected that have a high-transverse momentum electron or muon, missing transverse energy, and two jets, at least one of which is consistent with the hadronization of a b quark. Both the number of events and the dijet mass distribution are consistent with standard model background expectations, and we set 95% confidence level upper limits on …
Search For Second-Generation Scalar Leptoquarks In Pp̅ Collisions At √S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Search For Second-Generation Scalar Leptoquarks In Pp̅ Collisions At √S = 1:96 Tev, A. Abulencia, Kenneth A. Bloom, Cdf Collaboration
Kenneth Bloom Publications
Results on a search for pair production of second-generation scalar leptoquark in pp̅ collisions at √s =1:96 TeV are reported. The data analyzed were collected by the CDF detector during the 2002–2003 Tevatron Run II and correspond to an integrated luminosity of 198 pb-1. Leptoquarks (LQ) are sought through their decay into (charged) leptons and quarks, with final state signatures represented by two muons and jets and one muon, large transverse missing energy and jets. We observe no evidence for LQ production and derive 95% C.L. upper limits on the LQ production cross sections as well as lower …