Search for the Weak Decay of a Lightly Bound H0 Dibaryon

A. Alavi-Harati et al. (KTeV Collaboration)
Phys. Rev. Lett. 84, 2593 – Published 20 March 2000
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Abstract

We present results of a search for a new form of hadronic matter, a six-quark, dibaryon state called the H0, a state predicted to exist in several theoretical models. Analyzing data collected by experiment E799-II at Fermilab, we searched for the decay H0Λpπ and found no candidate events. We place an upper limit on [B(H0Λpπ)dσH/dΩ]/(dσΞ/dΩ) and, in the context of published models, exclude the region of lightly bound mass states just below the ΛΛ mass threshold, 2.194<MH<2.231GeV/c2, with lifetimes from 5×1010sec to 1×103sec.

  • Received 14 October 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.2593

©2000 American Physical Society

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Vol. 84, Iss. 12 — 20 March 2000

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