Observation of an excited Ω^- baryon

2018/05/23 by J. Yelton, I. Adachi, J. K. Ahn +189 · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1103/physrevlett.121.052003

published as Phys. Rev. Lett. 121, 052003 (2018) · Submitted to PRL

arxiv created 2018/05/23 · arxiv updated 2018/08/08

Abstract

Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^*- candidate decaying into Ξ⁰K^- and Ξ^-K⁰_S with a mass of 2012.4±0.7 \rm (stat)± 0.6 (\rm syst) \rm MeV/c² and a width of Γ=6.4^+2.5_-2.0 \rm(stat)±1.6 \rm(syst) \rm MeV. The Ω^*- is seen primarily in Υ(1S), Υ(2S), and Υ(3S) decays.

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