Search for a Stable Six-Quark State at BABAR
Name
PhysRevLett.122.072002.pdf
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595.39 KB
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Checksum (MD5)
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Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Brown, D. N.
Kolomensky, Yu. G.
Fritsch, M.
Koch, H.
Date Issued
February 2019
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lees, J. P. et al. "Search for a Stable Six-Quark State at BABAR." Physical Review Letters 122, 7 (February 2019): 072002
Version
Final published version
Abstract
Recent investigations have suggested that the six-quark combination uuddss could be a deeply bound state (S) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange six-quark state in ϒ→SΛ[over ¯]Λ[over ¯] decays based on a sample of 90×10⁶ϒ(2S) and 110×10⁶ϒ(3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined ϒ(2S,3S)→SΛ[over ¯]Λ[over ¯] branching fraction in the range (1.2–1.4)×10⁻⁷ are derived for m[subscript S] < 2.05 GeV. These bounds set stringent limits on the existence of such exotic particles.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.122.072002
