• Open Access

Observation of Ξ(1620)0 and Evidence for Ξ(1690)0 in Ξc+Ξπ+π+ Decays

M. Sumihama et al. (Belle Collaboration)
Phys. Rev. Lett. 122, 072501 – Published 21 February 2019

Abstract

We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξπ+ via Ξc+Ξπ+π+ decays based on a 980fb1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e collider. The mass and width are measured to be 1610.4±6.0(stat)4.2+6.1(syst)MeV/c2 and 59.9±4.8(stat)7.1+2.8(syst)MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=2.

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  • Received 15 October 2018
  • Revised 8 January 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.072501

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Nuclear Physics

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Vol. 122, Iss. 7 — 22 February 2019

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