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First Study of Reaction Ξ0n→Ξ−p Using Ξ0-Nucleus Scattering at an Electron-Positron Collider

Authors: Ablikim, M.; Achasov, M. N.; Adlarson, P.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; +193 Authors

First Study of Reaction Ξ0n→Ξ−p Using Ξ0-Nucleus Scattering at an Electron-Positron Collider

Abstract

Using (1.0087±0.0044)×1010 J/ψ events collected with the BESIII detector at the BEPCII storage ring, the process Ξ0n→Ξ−p is studied, where the Ξ0 baryon is produced in the process J/ψ→Ξ0Ξ¯0 and the neutron is a component of the Be9, C12, and Au197 nuclei in the beam pipe. A clear signal is observed with a statistical significance of 7.1σ. The cross section of the reaction Ξ0+Be9→Ξ−+p+Be8 is determined to be σ(Ξ0+Be9→Ξ−+p+Be8)=(22.1±5.3stat±4.5sys) mb at the Ξ0 momentum of 0.818 GeV/c, where the first uncertainty is statistical and the second is systematic. No significant H-dibaryon signal is observed in the Ξ−p final state. This is the first study of hyperon-nucleon interactions in electron-positron collisions and opens up a new direction for such research.

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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