3 research outputs found
Limits on Anomalous Triple Gauge Couplings in ppbar Collisions at sqrt{s}=1.96 TeV
We present a search for anomalous triple gauge couplings (ATGC) in WW and WZ
boson production. The boson pairs are produced in ppbar collisions at
sqrt{s}=1.96 TeV, and the data sample corresponds to 350 pb-1 of integrated
luminosity collected with the CDF II detector at the Fermilab Tevatron. In this
search one W decays to leptons, and the other boson (W or Z) decays
hadronically. Combining with a previously published CDF measurement of Wgamma
boson production yields ATGC limits of -0.18 < lambda < 0.17 and -0.46 < Delta
kappa < 0.39 at the 95% confidence level, using a cut-off scale Lambda=1.5 TeV.Comment: 7 pages, 3 figures. Submitted to Phys. Rev.
Measurement of the Top Quark Mass with the Dynamical Likelihood Method using Lepton plus Jets Events with b-tags in ppbar Collisions at s**(1/2) = 1.96 TeV
This report describes a measurement of the top quark mass, M_{top}, with the
dynamical likelihood method (DLM) using the CDF II detector at the Fermilab
Tevatron. The Tevatron produces top/anti-top pairs in protons and anti-protons
collisions at a center-of-mass energy of 1.96 TeV. The data sample used in this
analysis was accumulated from March 2002 through August 2004, which corresponds
to an integrated luminosity of 318 pb^{-1}. We use the top/anti-top candidates
in the ``lepton+jets'' decay channel, requiring at least one jet identified as
a b quark by finding a displaced secondary vertex. The DLM defines a likelihood
for each event based on the differential cross section as a function of M_{top}
per unit phase space volume of the final partons, multiplied by the transfer
functions from jet to parton energies. The method takes into account all
possible jet combinations in an event, and the likelihood is multiplied event
by event to derive the top quark mass by the maximum likelihood method. Using
63 top quark candidates observed in the data, with 9.2 events expected from
background, we measure the top quark mass to be 173.2 +2.6/-2.4 (stat.) +/- 3.2
(syst.) GeV/c^2, or 173.2 +4.1/-4.0 GeV/c^2.Comment: 66 pages, 26 figures, 4 table