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    Tisserand, V.; Grauges, E.; Eigen, G.; Brown, D. N.; Fritsch, M.; Schroeder, T.; Druzhinin, V. P.; Golubev, V. B.; Kravchenko, E. A.; Onuchin, A. P.; Serednyakov, S. I.; Solodov, E. P.; Lankford, A. J.; Lockman, W. S.; Panduro Vazquez, W.; Chao, D. S.; Cheng, C. H.; Echenard, B.; Hitlin, D. G.; Li, Y.; Miyashita, T. S.; Ongmongkolkul, P.; Röhrken, M.; Huard, Z.; Bernard, D.; Garzia, I.; Santoro, V.; Calcaterra, A.; Patteri, P.; Peruzzi, I. M.; Lacker, H. M.; Bhuyan, B.; Prell, S.; Arnaud, N.; Wright, D. M.; Gabathuler, E.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Cowan, G.; Griessinger, K.; Schubert, K. R.; Barlow, R. J.; Lafferty, G. D.; Dey, B.; Cremaldi, L.; Taras, P.; De Nardo, G.; Sciacca, C.; Raven, G.; Jessop, C. P.; LoSecco, J. M.; Gaz, A.; Margoni, M.; Posocco, M.; Simi, G.; Calderini, G.; Marchiori, G.; Biasini, M.; Casarosa, G.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Rama, M.; Zani, L.; Smith, A. J. S.; Ferroni, F.; Pilloni, A.; Bünger, C.; Dittrich, S.; Voß, C.; Vasseur, G.; Aston, D.; Dunwoodie, W.; Ebert, M.; Field, R. C.; Graham, M. T.; Hast, C.; Kim, P.; Luitz, S.; Roodman, A.; Wilson, J. R.; Randle-Conde, A.; Sekula, S. J.; Ahmed, H.; Bellis, M.; Puccio, E. M. T.; Ernst, J. A.; Schwitters, R. F.; Bianchi, F.; Beaulieu, A.; Kowalewski, R.; Lueck, T.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.; Tasneem, N.; Gershon, T. J.; Harrison, P. F.; Latham, T. E.

    Physical review letters, 02/2019, Volume: 122, Issue: 7
    Journal Article

    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→S$\bar{Λ}\bar{Λ}$ decays based on a sample of 90×10$^{6}$Υ(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) → S$\bar{Λ}\bar{Λ}$ 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.