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Monday, May 11, 2020 | History

2 edition of measurement of b-quark fragmentation fractions in p̄p collisions at (s)1/2=1.8 TeV. found in the catalog.

measurement of b-quark fragmentation fractions in p̄p collisions at (s)1/2=1.8 TeV.

Wendy J. Taylor

measurement of b-quark fragmentation fractions in p̄p collisions at (s)1/2=1.8 TeV.

by Wendy J. Taylor

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  • 2 Currently reading

Published .
Written in English

    Subjects:
  • Physics Theses

  • Edition Notes

    Thesis (Ph.D.), Dept. of Physics, University of Toronto.

    ContributionsSinervo, Pekka (supervisor)
    The Physical Object
    Pagination123 p.
    Number of Pages123
    ID Numbers
    Open LibraryOL21576327M
    ISBN 100612413233

    The dataset corresponds to an integrated luminosity of fb$^{-1}$, recorded in with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least . Search for b-Quark Associated MSSM Higgs Decaying to Tau-Pairs 12 / 12 Conclusions •MSSM Higgs ττoffers huge discovery potential over full allowed mass range •I presented results for the exclusive analysis (at least one b-tag) only. In an inclusive approach .

      When talking about this time period, it's important to distinguish between quarks, the entities postulated by Gell-Mann and others, to account for the patterns of properties among hadrons, and partons, the hard point-like entities inside nucleons that were postulated by Feynman and others to account for the results of deep inelastic scattering experiments. [Graduate Student Series in Physics] I.J.R. Aitchison A.J.G. Hey - Gauge Theories in Particle Physics- A Practical Introduction Volume 2( Taylor & Francis).pdf.

    The b-quark mass also enters the prediction for the cross sec-tion of the H → bb decay, which is the mode with the largest branching ratio for an SM-like Higgs with a mass of GeV. In the future, tests of this coupling will help providing further char-acterizationsof thenew boson. * Correspondingauthor. Lattice ’13 Contents 1. Heavy-quark physics Probing the Standard Model Heavy Meson Chiral Perturbation Theory B*Bπ coupling 2. B*Bπ coupling calculation Correlation functions Ratios 3. Results Chiral and continuum extrapolations Systematic errors 4. Conclusions.


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Measurement of b-quark fragmentation fractions in p̄p collisions at (s)1/2=1.8 TeV by Wendy J. Taylor Download PDF EPUB FB2

The excellent efficiency and resolution of this technique allow us to make the most precise determination of the b-quark fragmentation function, using e[superscript +]e[superscript -]→Z[superscript 0] decays recorded in the SLAC Large Detector experiment. We compared our measurement with the predictions of a number of fragmentation models.

With an integrated luminosity of fb−1 recorded by the ATLAS experiment at the LHC, the exclusive decays B 0s→J/ψϕ and B0d→J/ψK*0 of B mesons produced in pp collisions at √s=7 TeV are used to determine the ratio of fragmentation fractions fs/fd.

From the observed B0s→J/ψϕ and B0d→J/ψK*0 yields, the quantity (fs/fd)[B(B0s→J/ψϕ)/B(B 0d→J/ψK*0)] is measured to be 0 Cited by: 9. A novel technique for measuring the mass of the top quark that uses only the kinematic properties of its charged decay products is presented.

Top quark pair events with final states with one or two charged leptons and hadronic jets are selected from the data set of 8 TeV proton-proton collisions, corresponding to an integrated luminosity of inverse femtobarns. By reconstructing secondary. best measurement, and two new measurements of the fragmentation fraction fs/fd.

The importance of the fs/fd measurement are put in perspective in chapter 7 where their impact on the B0 s. „ ¯„¡ measurement is discussed.

The paper describing the B0 s. D § s K ¤ and B0 s!D ¡ s ¯ branching fractions measurement performed at LHCb with. Nicola Labanca currently works at the Joint Research Centre (JRC), European Commission. His most recent publication is 'Progress in the Implementation of the EU Energy Efficiency Directive through.

Measurement of the top quark mass using charged particles in pp collisions at p s = 8TeV The CMS Collaboration Abstract A novel technique for measuring the mass of the top quark that uses only the kine-matic properties of its charged decay products is presented.

Top quark pair events. Measurement of the top quark mass using charged particles in p p collisions at s = 8 TeV. with that expected from different choices of the b quark fragmentation function in pythia.

For Z2* LEP. We report a measurement of the forward-backward asymmetry, A[subscript FB], in b[bar over b] pairs produced in proton-antiproton collisions and identified by muons from semileptonAuthor: T. Aaltonen, S. Amerio, D. Amidei, A.

Anastassov, A. Annovi, J. Antos, G. Apollinari, J. Appel, T. decay into a W boson and a non-b quark. The ratio of branching fractions in which the top quark decays into a b quark over the branching fractions in which the top quark decays into all quarks is measured as part of this thesis, yielding the most precise measurement today.

W-boson decays and two b-quark jets. The measurement is per-formed with ten times more data than the previous ATLAS obser-vationoft¯t production[9]. The t¯ dilepton final states can be efficiently selected using kinematic requirements on the final state objects.

To further re-duce backgrounds and verify that the dilepton final states areAuthor: G. Aad, Chelstowska, M Consonni, N. de Groot, F. Filthaut, P.F. Klok, A.C. Konig, F. Koetsveld, M. Introduction.

The measurement of A b FB, the forward–backward asymmetry of b quarks produced in e + e − → b b ̄ events, provides an important test of the Standard Model, allowing the effective weak mixing angle sin 2 θ W eff to be determined with high differential cross-section for the production of b b ̄ pairs can be written as d σ dcos θ ∝1+ cos 2 θ+ 8 3 A b Cited by: 8.

A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole The DELPHI Collaboration J.

Abdallah26,23,55, P. Adzic12, T. Albrecht18, R. Alemany-Fernandez10, T. Allmendinger   The normalized differential cross section for top quark pair ([equation]) production is measured in pp collisions at a centre-of-mass energy of 8[equation]at the Cited by: 4.

Measurement of the charge asymmetry in top quark pair production in pp collisions at from a b-quark. A kinematic fit is used to reconstruct the tt¯event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for accep-tance and detector effects.

A measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions.

The event selection, optimized for reconstructing a single top quark in the final state, requires exactly one isolated lepton (muon or electron) and exactly two jets, one of which is likely to originate from the hadronization of a bottom quark.

for the measurement of normalized differential tt cross sec-tions at √ s = 7TeV, and is based on the final-state topology of tt events. The top quark decays almost exclusively into a W boson and a b quark, and only the subsequent decays of one or two of the W bosons into a charged lepton (electron or muon) and a neutrino are considered.

Title: Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisionsCited by: 1. A measurement of the cross section for the production of top quark–antiquark pairs (t t ¯) in association with a vector boson V (W or Z) in proton-proton collisions at s = 8 TeV is results are based on a dataset corresponding to an integrated luminosity of fb-1 recorded with the CMS detector at the LHC.

The measurement is performed in three leptonic (e and μ) channels: a Cited by: The large samples of Z 0 decays available both from LEP and from the SLC offer an unique laboratory for the study of QCD in heavy flavour events. Recent results from experiments at both machines are presented.

Measurements of the strong coupling constant α s for individual flavours are discussed. A number of measurements of the multiplicity in heavy quark events is available and are compared Author: T. Behnke. cross-section in pp collisions is calculated to be + − pb at approximate NNLO precision [4, 5] 1 at a cen-tre of mass energy √ s = 7 TeV assuming a top mass of GeV, and top quarks are predicted to decay to a W boson and a b-quark (t → Wb) nearly % of the time.

Events with a tt¯ pair can be classified as ‘single. A measurement of the top-antitop production charge asymmetry A C is presented using data corresponding to an integrated luminosity of fb−1 of Cited by: Search text. Search type Research Explorer Website Staff directory.

Alternatively, use our A–Z index.•Quarkonium in heavy-ion collisions •The LHCb detector •pPb collisions: recent results •𝐽Τ atTeV • (2S) at TeV •Υat TeV •PbPb collisions: work in progress 11/8/ QWG 2.