Using e+e- collision data corresponding to an integrated luminosity of 19 fb-1 collected by the BESIII detector at center-of-mass energies ranging from 4.13 to 4.70 GeV, we report the first evidence for a new excited ω- hyperon, the ω(2109)-, through the process e+e-→ω(2109)-ω¯++c. c. with a significance of 4.1σ. The mass and width of ω(2109)- are measured to be 2108.5±5.2stat±0.9syst MeV/c2 and 18.3±16.4stat±5.7syst MeV, respectively. We also present evidence for a new production mechanism for the previously identified ω(2012)- via the process e+e-→ω(2012)-ω¯++c. c. with a significance of 3.5σ.

Evidence for Two Excited ω- Hyperons

Garzia, I.;
2025

Abstract

Using e+e- collision data corresponding to an integrated luminosity of 19 fb-1 collected by the BESIII detector at center-of-mass energies ranging from 4.13 to 4.70 GeV, we report the first evidence for a new excited ω- hyperon, the ω(2109)-, through the process e+e-→ω(2109)-ω¯++c. c. with a significance of 4.1σ. The mass and width of ω(2109)- are measured to be 2108.5±5.2stat±0.9syst MeV/c2 and 18.3±16.4stat±5.7syst MeV, respectively. We also present evidence for a new production mechanism for the previously identified ω(2012)- via the process e+e-→ω(2012)-ω¯++c. c. with a significance of 3.5σ.
2025
Ablikim, M.; Achasov, M.  n.; Adlarson, P.; Afedulidis, O.; Ai, X.  c.; Aliberti, R.; Amoroso, A.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Bao, H...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2600412
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