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Search for a stable six-quark state at BABAR

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Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D.N., Kolomensky, Yu G., Fritsch, M., Koch, H. et al.
(2019) Search for a stable six-quark state at BABAR. Physical Review Letters, 122 (7). 072002 . doi:10.1103/PhysRevLett.122.072002 ISSN 0031-9007.

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Official URL: https://doi.org/10.1103/PhysRevLett.122.072002

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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 fora stable, doubly strange six-quark state in Υ→S ̄ Λ ̄Λ decays based on a sample of 90×106 Υ (2S) and 110×106 Υ (3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined Υ (2S,3S) → S ̄Λ ̄Λ branching fraction in the range (1.2–1.4)×10−7arederived for mS<2.05 GeV. These bounds set stringent limits on the existence of such exotic particles

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Quarks, Dark matter (Astronomy)
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 22 February 2019
Dates:
DateEvent
22 February 2019Published
2019Accepted
Volume: 122
Number: 7
Article Number: 072002
DOI: 10.1103/PhysRevLett.122.072002
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 5 April 2019
Date of first compliant Open Access: 8 April 2019

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