Speaker
Gerald Eigen
(University of Bergen (NO))
Description
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 $\Upsilon \to S \bar{\Lambda} \bar{\Lambda}$ decays with the $BABAR$ experiment. No signal is observed, and limits on the combined $\Upsilon(2S,3S) \to S \bar{\Lambda} \bar{\Lambda}$ branching fraction set stringent limits on the existence of such exotic particles.
Authors
Fabio Anulli
(Sapienza Universita e INFN, Roma I (IT))
Gerald Eigen
(University of Bergen (NO))
