Listed in this page are plain English summaries of published CDF results. An effort has been made to describe the relevance of these results to the scientifically curious public.

Please also see the Fermilab Today CDF Result of the Week archive which is less difficult, and also puts some faces on the physics.

• Global search for new physics in CDF data
  Typically, a CDF analysis will study one type of event, creating a detailed model of this single "channel" in order to search for new physics in the data. Instead, this analysis searches hundreds of different types of events produced at CDF in order to broadly look for discrepancies between what we expect to see and what the data shows us. This search could allow us to find new physics processes in places that we might never have looked in single channel analyses.

• Pentaquark production
  We know that there are 3-quark composite states like the proton, and 2-quark states, but some experiments have now claimed the existence of a 5-quark state. CDF has searched for this state, and found evidence against it.

• Exclusive photon pair production and also see Fermilab Today article
  Typically, when we create new particles in a particle collider, the incoming proton and antiproton are broken up. In this measurement, a special case of interaction happens where particles are produced without destroying the incoming particles.

• Precise B_c mass measurement and also see Fermilab Today article
  The B_c meson is the heaviest particle composed of two different quarks. This analysis is the first precise mass determination of this state.

• Search for Higgs in tau pairs and also see Fermilab Today article
  Higgs bosons decay primarily to heavy particles. In this analysis, a Higgs is searched for decaying to a tau⁺ and a tau^- particle.

• The Search for a heavier Higgs Boson and also see Fermilab Today article
  The Higgs boson is an artifact of the theory which explains the mass of fundamental particles. The standard model of particle physics describes the interactions between elementary particles. In the most basic form of the model, the fundamental force carriers are treated as massless particles. Since we know from experiments that particles do have mass, the standard model is equipped with the "Higgs mechanism", by which the symmetry of massless particles is broken and non-zero masses become possible. If this theory is true, an extra particle, called the Higgs boson, should exist.

• Observation of a Narrow State X(3872) and also see Fermilab Today article
  Particle spectroscopy appears to be making a comeback with the recent observation of several unexpected narrow particles containing charmed quarks at the B factories. This analysis reports the first observation of one of these particles, the X(3872), at the Tevatron. The observation of this narrow state has invited speculation that an exotic form of matter made up of 2 quarks and 2 anti-quarks may be been observed.

• Direct Kaluza-Klein graviton production at CDF
  This analysis is looking for events with large missing energy and a high energy jet. This is a characteristic signature for graviton production in the context of scenarios of extra spacial dimensions.

• Total top quark cross section:
  The discovery of the top quark was one of the major results of the CDF collaboration. In this paper we measure how frequently top quarks are produced relative to other more common processes.

• Double Diffraction Dissociation:
  and also see Fermilab Today article This is one of several studies done at the Tevatron on Diffractive processes. In this paper our measurements are compared with theoretical predictions and similar results at the HERA electron-proton collider.

• Supersymmetry search using Missing Energy:
  and also see Fermilab Today article This is a "blind search" for the supersymmetric partners of the quarks and the gluons that eventually decay into the lighest supersymmetric particle (LSP). In the search we look for a large energy imbalance in the detector, due to the heavy LSP that escapes the detector without leaving a trace.

• Search for the Decay Bs � m+ m- j in Proton-Antiproton Collisions:
  This is a search for decays of the Bs mesons that can occur only through rather unlikely mechanisms according to our current understanding. This leads to the expectation of very small decay probabilities (branching ratios) into these final states. New physics could make available additional paths to the final states studied, possibly increasing rather significantly these branching ratios. No signal is observed in this search.

• Supersymmetry search using Photons and b-quarks:
  This is a search for supersymmetry, which looks for typical signatures involving photons and b-quarks in the final state. This search does not find evidence for the production of supersymmetric particles and sets limits to their maximum allowed production rate.

• Charged Jet Evolution and the Underlying Event in Proton-Antiproton Collisions
  This is a study of the growth and development of "charged particle jets" produced in proton-antiproton collisions at 1.8 TeV. A variety of leading (highest transverse momentum) "charged jet" observables are compared with the QCD Monte-Carlo models HERWIG, ISAJET, and PYTHIA. The direction of the leading "charged particle jet" in each event is used to define three regions of eta-phi space. The "toward" region contains the leading "charged particle jet", while the "away" region, on the average, contains the away-side jet. The "transverse" region is perpendicular to the plane of the hard 2-to-2 parton scattering and is very sensitive to the "underlying event" component of the QCD Monte-Carlo models.
• Ratio of b-quark cross sections at 1800 and 630 GeV
  The production rates for creating particles containing beauty quarks from proton-antiproton interaction at two different beam center-of-mass energies are compared. We find that while the absolute value of these rates is higher than expectations from theory, their ratio agrees well with theory.
• Cross-section for J/psi production
  The J/psi meson is a bound state of a charmed quark and an anti-charm quark. We study several features of its production mechanism.
• Study of central rapidity gaps in events with a leading anti-proton
  This study continues the investigation of diffractive processes and their relation to rapidity gaps at the Tevatron.

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