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.

Search for a Stable Six-Quark State at BABAR / Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D.N., Kolomensky, Yu.G., Fritsch, M., Koch, H., Schroeder, T., Hearty, C., Mattison, T.S., Mckenna, J.A., So, R.Y., Blinov, V.E., Buzykaev, A.R., Druzhinin, V.P., Golubev, V.B., Kozyrev, E.A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 122:7(2019), p. 072002. [10.1103/PhysRevLett.122.072002]

Search for a Stable Six-Quark State at BABAR

Faccini, R.;Ferroni, F.;Pilloni, A.;
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.
2019
Physics and Astronomy (all)
01 Pubblicazione su rivista::01a Articolo in rivista
Search for a Stable Six-Quark State at BABAR / Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D.N., Kolomensky, Yu.G., Fritsch, M., Koch, H., Schroeder, T., Hearty, C., Mattison, T.S., Mckenna, J.A., So, R.Y., Blinov, V.E., Buzykaev, A.R., Druzhinin, V.P., Golubev, V.B., Kozyrev, E.A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 122:7(2019), p. 072002. [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/11573/1266457
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