FOCUS/E687 contributions of the UI Group

The E687 Collaboration studied production and decay properties of heavy flavours produced in photon-hadron interactions. the experiment recorded approximately 500 million hadronic triggers in the 1990-91 fixed target run at Fermilab from which over 80 thousand charm decays were fully reconstructed. Our follow up experiment called E831(FOCUS), ran during the 1996-7 run, acquired more than 1 million charm mesons and baryons, an order of magnitude more data on charm decays using an considerably upgraded spectrometer. Currently we are in the active stage of analyzing the excellent FOCUS data set.

The University of Illinois group has played a major role in nearly all aspects of E687 and FOCUS.

Specific contributions of the UI group to E687 include:

Construction of C1 which is one of the three Cerenkov counters used to identify charged particles.
Overview of the E687/FOCUS spectrometer and C1 mirrors
Contributions to the E687 software including:
- Cerenkov particle identification
- Vee reconstruction
- Magnetic tracing
- Charm particle vertex reconstruction
- the E687 Monte Carlo program
Contributions to the E687 data analysis effort. Papers principally authored at UI include:

Contributions of the UI group to FOCUS include, but not limited to:

Contributions to Software and Hardware of the FOCUS system.
- Improved Cerenkov identification,
  Nucl.Instrum.Meth.A484:270-286, 2002 hep-ex/0108011
- A completely re-written Monte Carlo program
- A new system to identify muons.
- Improved PWC efficiency coding in Monte Carlo program
Contibutions to the E831 data analysis effort. Papers principally authored at UI include:
- Measurements of the q^2 dependence of the D0 ---> K- Mu+ Nu and D0 ---> Pi- Mu+ Nu form factors (Coauthored by a FOCUS member at University of Colorado.)
  Phys.Lett.B607:233-242,2005, hep-ex/0410037
- New measurements of the Ds+ ---> Phi Mu+ Nu; form-factor ratios
  Phys.Lett.B586:183-190,2004, hep-ex/0401001
- Studies of Correlations between D AND Bar D Mesons in High Energy Photoproduction (Coauthored by a FOCUS member at FNAL.)
  Phys.Lett.B566:51-60,2003, hep-ex/0305018
- New Measurements of the D+ ---> Anti-K+*0 Mu+ Nu Form-Factor Ratios,
  Phys.Lett B544:89-96, 2002, hep-ex/0207049
- New Measurements of the Gamma(D+ ---> Anti-K*0 Mu+ Nu) / Gamma(D+ ---> K- Pi+ Pi+) and Gamma(D+(S) ---> Phi Mu+ Nu) / Gamma(D+(S) ---> Phi Pi+) Branching Raios.
  Phys.Lett B541:243-250, 2002, hep-ex/0206056
- Evidence for New Interference Phenomena in the Decay D+ ---> K- Pi+ Mu+ Nu,
  Phys.Lett B535:43-51, 2002, hep-ex/0203031
- A Measurement of Lifetime Differences in the Neutral D Meson System,
  Phys.Lett B485:62-70, 2000, hep-ex/0004034

Last modified, Feb 19, 2005 at 11:37 pm EST