Using a sample of (2.712 +/- 0.014) x 10(9)psi(3686) events collected with the BESIII detector at the electron positron collider BEPCII, the decay psi(3686) -> Xi K--(S)0(Omega) over bar (+) + c.c. is observed for the first time, which has a significance of 5.9 standard deviations. The branching fraction of this decay is measured to be (2.91 +/- 0.47 +/- 0.33) x 10(-6), where the first and second uncertainties are statistical and systematic, respectively. The ratio between B psi(3686)->Xi-KS0 (Omega) over bar++c.c and B psi(3686)->Omega-K+(Xi) over bar0+c.c. is determined to be 1.05 +/- 0.23 +/- 0.14, which deviates from the isospin symmetry conservation predicted value of 0.5 by 2.1 sigma.

Observation of ψ(3686) → Ξ-KS0(Ω)over-bar+ + c.c.

A. Amoroso;F. Bianchi;A. Bortone;M. Destefanis;F. De Mori;M. Greco;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2025-01-01

Abstract

Using a sample of (2.712 +/- 0.014) x 10(9)psi(3686) events collected with the BESIII detector at the electron positron collider BEPCII, the decay psi(3686) -> Xi K--(S)0(Omega) over bar (+) + c.c. is observed for the first time, which has a significance of 5.9 standard deviations. The branching fraction of this decay is measured to be (2.91 +/- 0.47 +/- 0.33) x 10(-6), where the first and second uncertainties are statistical and systematic, respectively. The ratio between B psi(3686)->Xi-KS0 (Omega) over bar++c.c and B psi(3686)->Omega-K+(Xi) over bar0+c.c. is determined to be 1.05 +/- 0.23 +/- 0.14, which deviates from the isospin symmetry conservation predicted value of 0.5 by 2.1 sigma.
2025
2025
6
1
17
https://link.springer.com/article/10.1007/JHEP06(2025)233
BESIII Experiment, Quarkonium, Charmonium Decay, Branching Fraction
M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, Y. Ban, H.-R. Bao, V. Batozskaya, K. Begzsuren, N...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2118971
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