A disoriented chiral condensate search at the Fermilab Tevatron
- Case Western Reserve Univ., Cleveland, OH (United States)
MiniMax (Fermilab T-864) was a small test/experiment at the Tevatron designed to search for disoriented chiral condensates (DCC) in the forward direction. Relativistic quantum field theory treats the vacuum as a medium, with bulk properties characterized by long-range order parameters. This has led to suggestions that regions of "disoriented vacuum" might be formed in high-energy collision processes. In particular, the approximate chiral symmetry of QCD could lead to regions of vacuum which have chiral order parameters disoriented to directions which have non-zero isospin, i.e. disoriented chiral condensates. A signature of DCC is the resulting distribution of the fraction of produced pions which are neutral. The MiniMax detector at the C0 collision region of the Tevatron was a telescope of 24 multi-wire proportional chambers (MWPC`s) with a lead converter behind the eighth MWPC, allowing the detection of charged particles and photon conversions in an acceptance approximately a circle of radius 0.6 in pseudorapidity-azimuthal-angle space, centered on pseudorapidity η ≈ 4. An electromagnetic calorimeter was located behind the MWPC telescope, and hadronic calorimeters and scintillator were located in the upstream anti-proton direction to tag diffractive events.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Physics
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 576117
- Report Number(s):
- DOE/CH/03000-T29; ON: DE98050623; TRN: 98:004555
- Resource Relation:
- Other Information: TH: Thesis (Ph.D.); PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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