Observation of the J/? and ?(3686) decays into ??+(?)over-bar-
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Physical Soc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The decays J/psi -> eta Sigma(+)(Sigma) over bar (-) and psi(3686) -> eta Sigma(+)(Sigma) over bar (-) are observed for the first time, using (10087 +/- 44) x 10(6) J/psi and (448.1 +/- 2.9) x 10(6) psi(3686) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be B(J/psi -> eta Sigma(+)(Sigma) over bar (-)) = (6.34 +/- 0.21 +/- 0.37) x 10(-5) and B(psi(3686) -> eta Sigma(+)(Sigma) over bar (-)) = ( 9.59 +/- 2.37 +/- 0.61) x 10(-6), where the first uncertainties are statistical and the second are systematic. The ratio of these two branching fractions is determined to be B(psi(3686) -> eta Sigma(+)(Sigma) over bar (-))/B(J/psi -> eta Sigma(+)(Sigma) over bar (-)) = (15.1 +/- 3.8)%, which is in agreement with the 12% rule.
Açıklama
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[No Keywords]
Kaynak
Physical Review D
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
106
Sayı
11
