Sara Jerger

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The DO Collaboration reports on a search for the standard model top quark in pp collisions at +s = 1.8 TeV at the Fermilab Tevatron with an integrated luminosity of approximately 50 pb '. We have searched for tt production in the dilepton and single-lepton decay channels with and without tagging of b-quark jets. We observed 17 events with an expected(More)
DØ has measured the inclusive production cross section of W and Z bosons in a sample of 13 pb −1 of data collected at the Fermilab Tevatron. The cross sections, multiplied by their leptonic branching fractions, for production in p¯ p collisions at √ s = 1.8 TeV are σ W B(W → eν) = 2.36 ± 0.02 ± 0.08 ± 0.13 nb,
The distribution of the transverse energy in jets has been measured in p p collisions at p s = 1:8 TeV using the DD detector at Fermilab. This measurement of the jet shape is made as a function of jet transverse energy in both the central and forward rapidity regions. Jets are observed to narrow both with increasing transverse energy and with increasing(More)
This paper presents a search for production of a hypothetical heavy particle X in association with a W boson. For the search presented here, the kinematics and acceptances are modelled under the assumption that the X particle has the spin and decay properties of the standard model Higgs boson with the modiication that only X ! bb decays are allowed. The W(More)
We report a search for effects of large extra spatial dimensions in pp collisions at a center-of-mass energy of 1.8 TeV with the D0 detector, using events containing a pair of electrons or photons. The data are in good agreement with the expected background and do not exhibit evidence for large extra dimensions. We set the most restrictive lower limits to(More)
We present a measurement of the W boson mass using data collected by the DØ experiment at the Fermilab Tevatron during 1994–1995. We identify W bosons by their decays to eν final states where the electron is detected in a forward calorimeter. We extract the W boson mass, M W , by fitting 3 4 the transverse mass and transverse electron and neutrino momentum(More)