Electron and photon identification in the D0 experiment Atkins, S.; Avila, C.; Baldin, B. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2014, Letnik:
750
Journal Article
Recenzirano
Odprti dostop
The electron and photon reconstruction and identification algorithms used by the D0 Collaboration at the Fermilab Tevatron collider are described. The determination of the electron energy scale and ...resolution is presented. Studies of the performance of the electron and photon reconstruction and identification are summarized. The results are based on measurements of Z boson decay events of Z→ee and Z→γℓℓ(ℓ=e,μ) collected in pp¯ collisions at a center-of-mass energy of 1.96TeV using an integrated luminosity of up to 10fb−1.
We present a measurement of the W boson mass using data corresponding to 4.3 fb{sup -1} of integrated luminosity collected with the D0 detector during Run II at the Fermilab Tevatron p{bar p} ...collider. With a sample of 1677394 W {yields} e{nu} candidate events, we measure M{sub W} = 80.367 {+-} 0.026 GeV. This result is combined with an earlier D0 result determined using an independent Run II data sample, corresponding to 1 fb{sup -1} of integrated luminosity, to yield M{sub W} = 80.375 {+-} 0.023 GeV.
We report results from searches for neutral Higgs bosons produced in p{bar p} collisions recorded by the D0 experiment at the Fermilab Tevatron Collider. We study the production of inclusive neutral ...Higgs boson in the {tau}{tau} final state and in association with a b quark in the b{tau}{tau} and bbb final states. These results are combined to improve the sensitivity to the production of neutral Higgs bosons in the context of the minimal supersymmetric standard model (MSSM). The data are found to be consistent with expectation from background processes. Upper limits on MSSM Higgs boson production are set for Higgs boson masses ranging from 90 to 300 GeV. We exclude tan {beta} > 20-30 for Higgs boson masses below 180 GeV. These are the most stringent constraints on MSSM Higgs boson production in p{bar p} collisions.
The Main Injector era of the Fermilab Tevatron is about to begin. Its first collider physics run (Run II) will start in the spring of 2001, with
p
p
collisions at √
s = 2.0 TeV and a expected ...integrated luminosity of 2 fb
−1 delivered in the first two years. The DØ detector is undergoing an extensive upgrade in order to take full advantage of this high luminosity running. The upgraded detector's silicon vertex detector, inner tracker, and muon trigger arrays, will make a rich
B physics program possible at DØ. In this paper we discuss our prospects for key measurements which include CP violation in
B →
J/Ψ +
K
s
decays, CP asymmetries in two body hadronic
B decays,
B
s
mixing, as well as spectroscopy and lifetime measurements of beauty baryons such as the Λ
b
.
Effects of hadron irradiation on scintillating fibers Abbott, B.; Adams, D.; Armstrong, T. ...
IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States),
08/1993, Letnik:
40, Številka:
4
Journal Article, Conference Proceeding
Recenzirano
Trackers based on scintillating-fiber technology are being considered by the Solenoidal Detector Collaboration at SSC and the DO collaboration at Fermilab. Some 600 fibers in the Fermilab Tevatron CO ...area were irradiated, thereby obtaining a hadronic irradiation at realistic rates. Four-meter-long samples of ten Bicron polystyrene-based fibre types, maintained in air, dry nitrogen, argon, and vacuum atmospheres within stainless-steel tubes, were irradiated for seven weeks at various distances from the accelerator beam pipes. Maximum doses, measured by thermoluminescence detectors, were about 80 krad. Fiber properties, particularly light yield and attenuation length, were measured over a one-year period. A description of the work together with the results is presented. At the doses achieved, corresponding to a few years of actual fiber-tracking detector operation, little degradation was observed. Recovery after several days' exposure to air was noted. Properties of unirradiated samples kept in darkness show no changes after one year.< >
DØ beauty physics in run II Jesik, Rick
Nuclear physics. Section B, Proceedings supplement,
02/2003, Letnik:
115
Journal Article
The Main Injector era of the Fermilab Tevatron has begun in earnest. The first collisions began in April of 2001, and after a year of final installation, commissioning, and calibration of the ...upgraded DØ detector, physics quality data is now being taken. We report on the status and operation of the detector and present a first look at the signals obtained in 5 pb
−1 of physics quality data. The prospects for two of our key
B physics measurements (sin2β and
B
s
mixing) will also be discussed.
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