Measurement of the inclusive isolated prompt photon cross section in pp̄ collisions at s=1.96TeV using the CDF detector
Physical Review D - Particles, Fields, Gravitation and Cosmology 80:11 (2009)
Abstract:
A measurement of the cross section for the inclusive production of isolated photons by the CDF experiment at the Fermilab Tevatron collider is presented. The measurement covers the pseudorapidity region |ηγ|<1.0 and the transverse energy range ETγ>30GeV and is based on 2.5fb-1 of integrated luminosity. The sample is almost a factor of 7 larger than those used for recent published results and extends the ETγ coverage by 100 GeV. The result agrees with next-to-leading order perturbative QCD calculations within uncertainties over the range 50W and Z physics
Proceedings of Science (2009)
Abstract:
The electroweak theory elegantly combines the electromagnetic and weak forces, explaining a wide range of interactions using a gauge theory with just three parameters. The theory predicted the W and Z weak gauge bosons before they were directly observed in 1983, and its detailed predictions of W and Z boson properties have been tested to such precision that they now serve as probes for new particles through loop-level interactions. Currently, the limiting parameter in these probes is the W boson mass, whose uncertainty has been recently reduced by measurements of √s = 1.96 TeV pp collision data produced by the Fermilab Tevatron. Future measurements at the Tevatron and the Large Hadron Collider will result in nearly a factor of three reduction in the uncertainty on the W boson mass, significantly constraining the Higgs boson mass and the masses and couplings of supersymmetric particles. Other W and Z boson properties recently constrained by measurements at the Tevatron and HERA include their self-couplings and couplings to quarks. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.Search for the associated production of the standard-model Higgs Boson in the all-hadronic channel.
Phys Rev Lett 103:22 (2009) 221801
Abstract:
We report on a search for the standard-model Higgs boson in pp collisions at square root(s) = 1.96 TeV using an integrated luminosity of 2.0 fb(-1). We look for production of the Higgs boson decaying to a pair of bottom quarks in association with a vector boson V (W or Z) decaying to quarks, resulting in a four-jet final state. Two of the jets are required to have secondary vertices consistent with B-hadron decays. We set the first 95% confidence level upper limit on the VH production cross section with V(--> qq/qq')H(--> bb) decay for Higgs boson masses of 100-150 GeV/c2 using data from run II at the Fermilab Tevatron. For m(H) = 120 GeV/c2, we exclude cross sections larger than 38 times the standard-model prediction.Search for the Associated Production of the Standard-Model Higgs Boson in the All-Hadronic Channel
Physical Review Letters 103:22 (2009)
Abstract:
We report on a search for the standard-model Higgs boson in pp̄ collisions at s=1.96TeV using an integrated luminosity of 2.0fb-1. We look for production of the Higgs boson decaying to a pair of bottom quarks in association with a vector boson V (W or Z) decaying to quarks, resulting in a four-jet final state. Two of the jets are required to have secondary vertices consistent with B-hadron decays. We set the first 95% confidence level upper limit on the VH production cross section with V(→qq̄/qq′)H(→bb̄) decay for Higgs boson masses of 100-150GeV/c2 using data from run II at the Fermilab Tevatron. For mH=120GeV/c2, we exclude cross sections larger than 38 times the standard-model prediction. © 2009 The American Physical Society.Search for Higgs bosons predicted in two-Higgs-doublet models via decays to tau lepton pairs in 1.96 TeV pp collisions.
Phys Rev Lett 103:20 (2009) 201801