The decays J/ψ→ης+ς¯- and ψ(3686)→ης+ς¯- are observed for the first time, using (10087±44)×106 J/ψ and (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be B(J/ψ→ης+ς¯-)=(6.34±0.21±0.37)×10-5 and B(ψ(3686)→ης+ς¯-)=(9.59±2.37±0.61)×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(ψ(3686)→ης+ς¯-)B(J/ψ→ης+ς¯-)=(15.1±3.8)%, which is in agreement with the "12% rule."

Observation of the J(ψ) and ψ(3686) decays into ηΣ+ Σ ̄ −

A. Amoroso;F. Bianchi;A. Bortone;M. Destefanis;F. De Mori;L. Fava;M. Greco;J. ???F. Hu;L. Lavezzi;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2022-01-01

Abstract

The decays J/ψ→ης+ς¯- and ψ(3686)→ης+ς¯- are observed for the first time, using (10087±44)×106 J/ψ and (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be B(J/ψ→ης+ς¯-)=(6.34±0.21±0.37)×10-5 and B(ψ(3686)→ης+ς¯-)=(9.59±2.37±0.61)×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(ψ(3686)→ης+ς¯-)B(J/ψ→ης+ς¯-)=(15.1±3.8)%, which is in agreement with the "12% rule."
2022
Inglese
Esperti anonimi
106
11
112007-1
112007-10
10
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.106.112007
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M. Ablikim; M.???N. Achasov; P. Adlarson; M. Albrecht; R. Aliberti; A. Amoroso; M.???R. An; Q. An; Y. Bai; O. Bakina; R. Baldini Ferroli; I. Balossino...espandi
info:eu-repo/semantics/article
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1891371
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