Search for exotic S=-2 baryons in pp collisions at {radical}(s)=1.96 TeV
- University of Illinois, Urbana, Illinois 61801 (United States)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
A search for a manifestly exotic S=-2 baryon state decaying to {xi}{sup -}{pi}{sup -}, and its neutral partner decaying to {xi}{sup -}{pi}{sup +}, has been performed using 220 pb{sup -1} of pp collisions at {radical}(s)=1.96 TeV collected by the Collider Detector at Fermilab. The {xi}{sup -} trajectories were measured in a silicon tracker before their decay, resulting in a sample with low background and excellent position resolution. No evidence was found for S=-2 pentaquark candidates in the invariant mass range of 1600-2100 MeV/c{sup 2}. Upper limits on the product of pentaquark production cross section times its branching fraction to {xi}{sup -}{pi}{sup +,-}, relative to the cross section of the well-established {xi}(1530) resonance, are presented for neutral and doubly negative candidates with p{sub T}>2 GeV/c and |y|<1 as a function of pentaquark mass. At 1862 MeV/c{sup 2}, these upper limits for neutral and doubly negative final states were found to be 3.2% and 1.7% at the 90% confidence level, respectively.
- OSTI ID:
- 21010967
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevD.75.032003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CDF Collaboration; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BRANCHING RATIO
CROSS SECTIONS
FERMILAB COLLIDER DETECTOR
GEV RANGE
INCLUSIVE INTERACTIONS
LIMITING VALUES
MEV RANGE
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
PROTON-PROTON INTERACTIONS
REST MASS
TEV RANGE
XI MINUS PARTICLES
XI-1530 BARYONS