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Measurement of branching fractions of J/psi and psi(3686) decays to Sigma(+) and (Sigma)over-bar(-)

Ablikim, M. ; Adlarson, Patrik ; Ikegami Andersson, Walter ; Johansson, Tord ; Kupsc, Andrzej ; Pettersson, Joachim ; Schönning, Karin ; Thorén, Viktor ; Wolke, Magnus ; Zou, J. H.

The journal of high energy physics, 2021-11 (11) [Periódico revisado por pares]

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Título:
Measurement of branching fractions of J/psi and psi(3686) decays to Sigma(+) and (Sigma)over-bar(-)
Autor: Ablikim, M. ; Adlarson, Patrik ; Ikegami Andersson, Walter ; Johansson, Tord ; Kupsc, Andrzej ; Pettersson, Joachim ; Schönning, Karin ; Thorén, Viktor ; Wolke, Magnus ; Zou, J. H.
Assuntos: Branching fraction ; e(+)-e(-) Experiments ; QCD
É parte de: The journal of high energy physics, 2021-11 (11)
Descrição: Using 1310.6 x 10(6) J/psi and 448.1 x 10(6) psi(3686) events collected with the BESIII detector, the branching fractions of J/psi decays to Sigma(+)(Sigma) over bar (-) is measured to be (10.61 +/- 0.04 +/- 0.36) x 10(-4), which is significantly more precise than the current world average. The branching fractions of psi(3686) decays to Sigma(+)(Sigma) over bar (-) is measured to be (2.52 +/- 0.04 +/- 0.09) x 10(-4), which is consistent with the previous measurements. In addition, the ratio of beta(psi(3686) -> Sigma(+)(Sigma) over bar (-)) / beta(J/psi -> Sigma(+)(Sigma) over bar (-)) is determined to be (23.8 +/- 1.1)% which violates the "12% rule".
Idioma: Inglês

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