Observation of ψ(3686)→Λ¯Λη′ decay

• Using a sample of (27.12±0.14)×108  ψ(3686) events collected with the BESIII detector, the decay ψ(3686)→Λ¯Λη′ with η′ subsequently decaying into γπ+π− and ηπ+π− is observed for the first time. The branching fraction of ψ(3686)→Λ¯Λη′ is measured to be (7.34±0.94(stat)±0.43(sys))×10−6. No resonant structures are evident in the Λη′, ¯Λη′ and Λ¯Λ mass spectra.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Publication and Content Type

ref (subject category)

art (subject category)