## Search for Exotic $S=-2$ Baryons in $p\bar{p}$ Collisions at $\sqrt{s}=1.96\,TeV$

A search for a manifestly exotic S=-2 baryon state decaying to Xi-pi-, and its neutral partner decaying to Xi-pi+, has been performed using 220 pb-1 of p[overline p] collisions at sqrt(s)=1.96 TeV collected by the Collider Detector at Fermilab. The Xi- 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/c2. Upper limits on the product of pentaquark production cross section times its branching fraction to Xi-pi+,-, relative to the cross section of the well-established Xi(1530) resonance, are presented for neutral and doubly negative candidates with pT>2 GeV/c and |y|

### Duke Scholars

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## Publication Date

## Volume

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## Related Subject Headings

- Nuclear & Particles Physics
- 5107 Particle and high energy physics
- 5101 Astronomical sciences
- 4902 Mathematical physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences

### Citation

*Phys. Rev.*,

*D75*, 032003.

*Phys. Rev.*D75 (2007): 032003.

*Phys. Rev.*, vol. D75, 2007, p. 032003.

## Published In

## Publication Date

## Volume

## Start / End Page

## Related Subject Headings

- Nuclear & Particles Physics
- 5107 Particle and high energy physics
- 5101 Astronomical sciences
- 4902 Mathematical physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences