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¯Λ¯Λ decays based on a sample of 90×106Υ(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¯Λ¯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.

Search for a Stable Six-Quark State at BABAR

Lanceri, L.;Vitale, L.;
2019-01-01

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→S¯Λ¯Λ decays based on a sample of 90×106Υ(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¯Λ¯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.
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.122.072002.pdf

accesso aperto

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 595.39 kB
Formato Adobe PDF
595.39 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2941982
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 9
social impact