Search for a Stable Six-Quark State at BABAR



Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, Yu G, Fritsch, M, Koch, H
et al (show 227 more authors) (2019) Search for a Stable Six-Quark State at BABAR. PHYSICAL REVIEW LETTERS, 122 (7). 072002-.

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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 ϒ→SΛ[over ¯]Λ[over ¯] decays based on a sample of 90×10^{6}ϒ(2S) and 110×10^{6}ϒ(3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined ϒ(2S,3S)→SΛ[over ¯]Λ[over ¯] branching fraction in the range (1.2-1.4)×10^{-7} are derived for m_{S}<2.05  GeV. These bounds set stringent limits on the existence of such exotic particles.

Item Type: Article
Uncontrolled Keywords: <i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration
Depositing User: Symplectic Admin
Date Deposited: 14 Mar 2019 16:21
Last Modified: 19 Jan 2023 00:57
DOI: 10.1103/PhysRevLett.122.072002
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3034244