El experimento CDF Collider Detector at Fermilab

CDF stands for the Collider Detector at Fermilab. CDF is an experiment at Fermilab, which is currently home to the second world's most powerful particle accelerator called the Tevatron. The CDF is an international collaboration of about 500 Physicists (from universities and national laboratories from Canada, Italy, Japan, UK, US, Germany, Spain, Russia, Finland, France, Taiwan, Korea, Switzerland, etc.). 

The IFCA group has play an important role in the data taken from 2002 up to now. During the upgrade of the CDF detector, by building and commissioning of a particle identification detector, the Time-of-Flight (TOF), that has proven to be instrumental for the observation of oscillations of the strange B meson into its antiparticle.  REFTOF 

From the physics side the group has particpated in several analysis in this last decade. We have been very involved in the observation of Bs - Bs oscillations from a time-dependent measurement of the Bs  oscillation frequency Δms. [REFBS]. From the high momentum physics, we started measuring the top cross section in the lepton plus jet channel [REFTOP]. From this analysis we move to the search for the single top process.The production of single top quarks, which involves the weak nuclear force and is harder to identify experimentally, has now been observed, almost 14 years to the day of the top quark discovery in 1995  RREFSGTOP. At the same time we were involved in the single top search, we started the search for the higgs boson, produce in association with W and decay into bbbar, which is the same final state as the single top analysis.

 The advance analysis techniques pioneered for the single top discovery are now in use for the Higgs boson search.  For the first time in an hadronic collision data new constraints on the elusive Higgs particle are more stringent than ever before xperiments now exclude a Higgs particle with a mass between 158 and 175 GeV/c2. Searches by previous experiments and constraints due to the Standard Model of Particles and Forces indicate that the Higgs particle should have a mass between 114 and 185 GeV/c2. The new Fermilab result rules out about a quarter of the expected Higgs mass range. REFHIGG

  1. A Time-Of-Flight Detector in CDF-II,  Nucl. Instrum. Meth. A518:605-608, 2004
  2. Observation of Bs-Bsbar Oscillations, Phys.Rev.Lett.97:242003,2006
  3. Measurement of the tt-bar Production Cross Section in p anti-p Collisions at s**(1/2) = 1.96 TeV using Lepton + Jets Events with Jet Probability b-tagging,  Phys. Rev. D74, 072006 (2006).
  4. Measurement of the tt-bar Production Cross Section in p anti-p Collisions at s**(1/2) = 1.96 TeV, Phys. Rev. Lett. 97, 082004 (2006).
  5. Observation of single top quark production with CDF,  Phys. Rev. D 82, 112005 (2010).
  6. Search for a Standard Model Higgs Boson in WH --> l nu bb-bar in p anti-p Collisions at s**(1/2) =1.96 TeV, Phys. Rev. Lett. 103, 101802 (2009)
  7. Combined CDF and D0 Upper Limits on Standard-Model Higgs-Boson Production. arXiv:1007.4587 [hep-ex].

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