Observation of the decay psi(3686)-> Sigma(-) (Sigma)over-bar(+) and measurement of its angular distribution

• Using (448.1 +/- 2.9) x 10(6) psi(3686) events collected with the BESIII detector at the BEPCII collider, the decay psi(3686) -> Sigma(-) (Sigma) over bar (+) is observed for the first time with a branching fraction of (2.82 +/- 0.04(stat). +/- 0.08(syst).) x 10(-4), and the angular parameter alpha(Sigma)- is measured to be 0.96 +/- 0.09(stat). +/- 0.03(syst.).

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)

Keyword

Branching fraction

e(+)-e(-)

Experiments

Particle and Resonance Production

Spectroscopy

Publication and Content Type

ref (subject category)

art (subject category)