Indirect measurement of sin2θw (MW ) using e+e- pairs in the Z-boson region with p̄p collisions at a center-of-momentum energy of 1.96 TeV
Physical Review D - Particles, Fields, Gravitation and Cosmology 88:7 (2013)
Abstract:
Drell-Yan lepton pairs are produced in the process p̄p→e +e-+X through an intermediate γ*/Z boson. The lepton angular distributions are used to provide information on the electroweak-mixing parameter sin2θw via its observable effective-leptonic sin2θw, or sinâ¡2θefflept. A new method to infer sin 2θw or, equivalently, the W-boson mass MW in the on-shell scheme, is developed and tested using a previous CDF Run II measurement of angular distributions from electron pairs in a sample corresponding to 2.1 fb-1 of integrated luminosity from p̄p collisions at a center-of-momentum energy of 1.96 TeV. The value of sinâ¡2θefflept is found to be 0.2328±0.0011. Within a specified context of the standard model, this results in sin 2θw=0.2246±0.0011, which corresponds to a W-boson mass of 80.297±0.055 GeV/c2, in agreement with previous determinations in electron-position collisions and at the Tevatron collider. © 2013 American Physical Society.Erratum: Indirect measurement of sin2θW (MW) using e+e- pairs in the Z-boson region with pp¯ collisions at a center-of-momentum energy of 1.96 TeV [Phys. Rev. D 88, 072002 (2013)]
Physical Review D American Physical Society (APS) 88:7 (2013) 079905
Search for the production of ZW and ZZ boson pairs decaying into charged leptons and jets in proton-antiproton collisions at sqrt(s)=1.96 TeV
ArXiv 1310.0086 (2013)
Abstract:
We present a measurement of the production cross section for ZW and ZZ boson pairs in final states with a pair of charged leptons, from the decay of a Z boson, and at least two jets, from the decay of a W or Z boson, using the full sample of proton-antiproton collisions recorded with the CDF II detector at the Tevatron, corresponding to 8.9 fb^(-1) of integrated luminosity. We increase the sensitivity to vector boson decays into pairs of quarks using a neural network discriminant that exploits the differences between the spatial spread of energy depositions and charged-particle momenta contained within the jet of particles originating from quarks and gluons. Additionally, we employ new jet energy corrections to Monte Carlo simulations that account for differences in the observed energy scales for quark and gluon jets. The number of signal events is extracted through a simultaneous fit to the dijet mass spectrum in three classes of events: events likely to contain jets with a heavy-quark decay, events likely to contain jets originating from light quarks, and events that fail these identification criteria. We determine the production cross section to be 2.5 +2.0 -1.0 pb (< 6.1 pb at the 95% confidence level), consistent with the standard model prediction of 5.1 pb.Combination of searches for the Higgs boson using the full CDF data set
Physical Review D - Particles, Fields, Gravitation and Cosmology 88:5 (2013)
Abstract:
We present a combination of searches for the standard model Higgs boson using the full CDF run II data set, which corresponds to an integrated luminosity of 9.45-10.0 fb-1 collected from √s=1.96 TeV pp̄ collisions at the Fermilab Tevatron. The searches consider Higgs boson production from gluon-gluon fusion, vector-boson fusion, and associated production with either a W or Z boson or a tt̄ pair. Depending on the production mode, Higgs boson decays to W+W-, ZZ, bb̄, τ+τ-, and γγ are examined. We search for a Higgs boson with masses (mH) in the range 90-200 GeV/c2. In the absence of a signal, we expect based on combined search sensitivity to exclude at the 95% credibility level the mass regions 90Higgs boson studies at the Tevatron
Physical Review D - Particles, Fields, Gravitation and Cosmology 88:5 (2013)