Phys. Rev. Lett. 79, 4083–4087 (1997)Search for Light Gluinos via the Spontaneous Appearance of π+π- Pairs with an 800GeV/c Proton Beam at FermilabReceived 18 July 1997; published in the issue dated 24 November 1997 We searched for the appearance of π+π- pairs with invariant mass ≥648MeV/c2 in a neutral beam. Such an observation could signify the decay of a long-lived light neutral particle. We find no evidence for this decay. Our null result severely constrains the existence of an R0 hadron, which is the lightest bound state of a gluon and a light gluino (gg̃), and thereby also the existence of a light gluino. Depending on the photino mass, we exclude the R0 in the mass and lifetime ranges of 1.2–4.6GeV/c2 and 2×10-10–7×10-4s, respectively. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.4083
DOI:
10.1103/PhysRevLett.79.4083
PACS:
13.85.Rm, 13.25.Es, 14.40.Aq, 14.80.Ly
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