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Observation of Coulomb-Assisted Nuclear Bound State of ΞN14 System

S. H. Hayakawa et al. (J-PARC E07 Collaboration)
Phys. Rev. Lett. 126, 062501 – Published 11 February 2021
Physics logo See synopsis: Doubly Strange Nucleus Observed

Abstract

In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ+N14BeΛ10+HeΛ5. For the binding energy of the Ξ hyperon in the ΞN14 system a value of 1.27±0.21MeV was deduced. The energy level of Ξ is likely a nuclear 1p state which indicates a weak ΞNΛΛ coupling.

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  • Received 28 October 2020
  • Revised 19 November 2020
  • Accepted 23 December 2020

DOI:https://doi.org/10.1103/PhysRevLett.126.062501

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Doubly Strange Nucleus Observed

Published 11 February 2021

Particle physicists have detected a short-lived nucleus containing two strange quarks, whose properties could provide new insights into the behavior of other nuclear particles.

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Vol. 126, Iss. 6 — 12 February 2021

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