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# Search results

624 records were found.

## Search for narrow resonances below the Upsilon mesons

Comment: 20 pages, 9 figures. This version has some typos fixed in the text and bibliography. A reference was added in bibliography. Submitted to Phys. Rev. D With this last submission we provide the version accepted for publication in Phys.Rev.D

## Development of FTK architecture: a fast hardware track trigger for the ATLAS detector

Comment: To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726

## The Evolution of FTK, a Real-Time Tracker for Hadron Collider Experiments

Comment: 11th ICATPP conference

## The CDF-II Online Silicon Vertex Tracker

Comment: Invited talk at the ICALEPCS2001 Conference, Novermber 27-30, 2001, San Jose, California, 5 pages, LaTex, 3 figures

## Cross section for forward J/psi production in p(p)over-bar collisions at root s=1.8 TeV

The inclusive cross section for J/psi production times the branching ratio B(J/psi→mu(+)mu(-)) has been measured in the forward pseudorapidity region: Bxdsigma[(p) over bar +p→J/psi(p(T) gt 10 GeV/c,2.1 lt \eta\ lt 2.6)+X]/deta=192+/-9(stat)+/- 29(syst) pb. The results are based on 74.1+/-5.2 pb(-1) of data collected by the CDF Collaboration at the Fermilab Tevatron Collider. The measurements extend earlier measurements of the D0 Collaboration to higher p(T)(J/psi). In the kinematic range where the experiments partially overlap, these data are in good agreement with previous measurements.

## Search for new heavy particles in the WZ0 final state in ppover-bar collisions at root s=1.8 TeV

We present the first general search for new heavy particles, X, which decay via X → WZ(0) → enu + jj as a function of M-X and Gamma(X) in p(p) over bar collisions at roots = 1.8 TeV. No evidence is found for production of X in 110 pb(-1) of data collected by the Collider Detector at Fermilab. General cross section limits are set at the 95% C.L. as a function of mass and width of the new particle. The results are further interpreted as mass lit-nits on the production of new heavy charged vector bosons which decay via W' → WZ(0) in an extended gauge model as a function of the width, Gamma(W'), and mixing factor between the W' and the standard model W bosons.

## Search for narrow diphoton resonances and for gamma gamma+W/Z signatures in p(p)over-bar collisions at root s=1.8 TeV

We present results of searches for diphoton resonances produced both inclusively and also in association with a vector boson (W or Z) using 100 pb(-1) of p (p) over bar collisions using the CDF detector. We set upper limits on the product of cross section times branching ratio for both p (p) over bar → gamma gamma +X and p (p) over bar → gamma gamma+ W/Z. Comparing the inclusive production to the expectations from heavy sgoldstinos we derive limits on the supersymmetry-breaking scale rootF in the TeV range, depending on the sgoldstino mass and the choice of other parameters. Also. using a NLO prediction for the associated production of a Higgs boson with a W or Z boson, we set an upper limit on the branching ratio for H → gamma gamma. Finally, we set a lower limit on the mass of a "bosophilic" Higgs boson (e.g., one which couples only ...

## Branching ratio measurements of exclusive B+ decays to charmonium with the Collider Detector at Fermilab

We report on measurements of the branching ratios of the decays B+→chi(c1)(0)(1P)K+ and B+→J/psiK(+)pi(+)pi(-), where chi(c1)(0)(1P)→J/psigamma and J/psi→mu(+)mu(-) in p (p) over bar collisions at roots=1.8 TeV. Using a data sample from an integrated luminosity of 110 pb(-1) collected by the Collider Detector at Fermilab we measure the branching ratios to be BR(B+→chi(c1)(0)(1P)K+)=15.5+/-5.4(stat)+/-1.5(syst)+/- 1.3(br)x10(-4) and BR(B+→J/psiK(+)pi(+)pi(-))=6.9+/- 1.8(stat)+/-1.1(syst)+/-0.4(br)x10(-4) where (br) is due to the finite precision on BR(B+→J/psiK(+)), BR(chi(c1)(0)(1P)→J/psigamma) is used to normalize the signal yield, and (syst) encompasses all other systematic uncertainties.

## Search for new particles decaying to tt in pp collisions at square root s=1.8 TeV

We use 106 pb/sup -1/ of data collected with the Collider Detector at Fermilab to search for narrow-width, vector particles decaying to a top and an antitop quark. Model independent upper limits on the cross section for narrow, vector resonances decaying to tt are presented. At the 95% confidence level, we exclude the existence of a leptophobic Z' boson in a model of top-color-assisted technicolor with mass M/sub Z'/ lt 480 GeV/c/sup 2/ for natural width Gamma =0.012M/sub Z'/, and M/sub Z'/ lt 780 GeV/c/sup 2/ for Gamma =0.04M/sub Z'/.