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 →SΛΛ decays based on a sample of 90×106(2S) and 110×106(3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined (2S,3S)→SΛΛ branching fraction in the range (1.2-1.4)×10-7 are derived for mS<2.05 GeV. These bounds set stringent limits on the existence of such exotic particles.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2019). Search for a Stable Six-Quark State at BABAR. PHYSICAL REVIEW LETTERS, 122(7) [10.1103/PhysRevLett.122.072002].

Search for a Stable Six-Quark State at BABAR

Carpinelli M.;
2019

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 →SΛΛ decays based on a sample of 90×106(2S) and 110×106(3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined (2S,3S)→SΛΛ branching fraction in the range (1.2-1.4)×10-7 are derived for mS<2.05 GeV. These bounds set stringent limits on the existence of such exotic particles.
Articolo in rivista - Articolo scientifico
Atomic physics; Physics; A-stable; BABAR experiment; Bound state; Branching fractions; Confidence levels; Exotic particles
English
2019
122
7
072002
none
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2019). Search for a Stable Six-Quark State at BABAR. PHYSICAL REVIEW LETTERS, 122(7) [10.1103/PhysRevLett.122.072002].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/395238
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