Search for exotic S=-2 baryons in pp collisions at {radical}(s)=1.96 TeV

Journal Article · Thu Feb 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.032003· OSTI ID:21010967

Abulencia, A; Budd, S; Ciobanu, C I; Errede, D; Errede, S; Gerberich, H; Grundler, U; Junk, T R; Kraus, J; Marino, C P; Pitts, K; Rogers, E; Taffard, A; Veramendi, G; Zhang, X ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Furic, I; Grosso-Pilcher, C ^[2]

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1. University of Illinois, Urbana, Illinois 61801 (United States)
2. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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