TY - JOUR

T1 - Evidence for Two Excited Ω^{-} Hyperons

AU - BESIII Collaboration

AU - Achasov, M N

AU - Nikolaev, I B

AU - Мучной, Николай Юрьевич

PY - 2025/4/4

Y1 - 2025/4/4

N2 - 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[over ¯]^{+}+c.  c. with a significance of 4.1σ. The mass and width of Ω(2109)^{-} are measured to be 2108.5±5.2_{stat}±0.9_{syst}  MeV/c^{2} and 18.3±16.4_{stat}±5.7_{syst}  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[over ¯]^{+}+c.  c. with a significance of 3.5σ.

AB - 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[over ¯]^{+}+c.  c. with a significance of 4.1σ. The mass and width of Ω(2109)^{-} are measured to be 2108.5±5.2_{stat}±0.9_{syst}  MeV/c^{2} and 18.3±16.4_{stat}±5.7_{syst}  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[over ¯]^{+}+c.  c. with a significance of 3.5σ.

UR - https://pubmed.ncbi.nlm.nih.gov/40250399/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105003771746&origin=inward&txGid=650c0d8ab521041a83966a1c5c788caa

U2 - 10.1103/PhysRevLett.134.131903

DO - 10.1103/PhysRevLett.134.131903

M3 - Article

C2 - 40250399

VL - 134

SP - 131903

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 13

ER -