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http://hdl.handle.net/2445/171018
Title: | Search for a Stable Six-Quark State at BABAR |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Quarks Matèria fosca (Astronomia) Partícules (Matèria) Quarks Dark matter (Astronomy) Particles |
Issue Date: | 22-Feb-2019 |
Publisher: | American Physical Society |
Abstract: | Recent investigations have suggested that the six-quark combination u u d d s s 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 → S ¯ Λ ¯ Λ decays based on a sample of 90 × 1 0 6 Υ ( 2 S ) and 110 × 1 0 6 Υ ( 3 S ) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined Υ ( 2 S , 3 S ) → S ¯ Λ ¯ Λ branching fraction in the range ( 1.2 - 1.4 ) × 1 0 − 7 are derived for m S < 2.05 GeV . These bounds set stringent limits on the existence of such exotic particles. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.122.072002 |
It is part of: | Physical Review Letters, 2019, vol. 122, num. 7, p. 072002 |
URI: | http://hdl.handle.net/2445/171018 |
Related resource: | https://doi.org/10.1103/PhysRevLett.122.072002 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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