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First Study of Reaction Ξ^{0}n→Ξ^{-}p Using Ξ^{0}-Nucleus Scattering at an Electron-Positron Collider. / The BESIII Collaboration ; Мучной, Николай Юрьевич; Николаев, Иван Борисович.
в: Physical Review Letters, Том 130, № 25, 21.06.2023, стр. 251902.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - First Study of Reaction Ξ^{0}n→Ξ^{-}p Using Ξ^{0}-Nucleus Scattering at an Electron-Positron Collider
AU - BESIII Collaboration
AU - Achasov, M N
AU - Boyko, I
AU - Мучной, Николай Юрьевич
AU - Николаев, Иван Борисович
N1 - First Study of Reaction Ξ0n→Ξ−p Using Ξ0 -Nucleus Scattering at an Electron-Positron Collider / BESIII Collaboration // Physical Review Letters. – 2023. – Vol. 130, No. 25. – P. 251902. – DOI 10.1103/physrevlett.130.251902.
PY - 2023/6/21
Y1 - 2023/6/21
N2 - Using (1.0087±0.0044)×10^{10} J/ψ events collected with the BESIII detector at the BEPCII storage ring, the process Ξ^{0}n→Ξ^{-}p is studied, where the Ξ^{0} baryon is produced in the process J/ψ→Ξ^{0}Ξ[over ¯]^{0} and the neutron is a component of the ^{9}Be, ^{12}C, and ^{197}Au nuclei in the beam pipe. A clear signal is observed with a statistical significance of 7.1σ. The cross section of the reaction Ξ^{0}+^{9}Be→Ξ^{-}+p+^{8}Be is determined to be σ(Ξ^{0}+^{9}Be→Ξ^{-}+p+^{8}Be)=(22.1±5.3_{stat}±4.5_{sys}) mb at the Ξ^{0} 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.
AB - Using (1.0087±0.0044)×10^{10} J/ψ events collected with the BESIII detector at the BEPCII storage ring, the process Ξ^{0}n→Ξ^{-}p is studied, where the Ξ^{0} baryon is produced in the process J/ψ→Ξ^{0}Ξ[over ¯]^{0} and the neutron is a component of the ^{9}Be, ^{12}C, and ^{197}Au nuclei in the beam pipe. A clear signal is observed with a statistical significance of 7.1σ. The cross section of the reaction Ξ^{0}+^{9}Be→Ξ^{-}+p+^{8}Be is determined to be σ(Ξ^{0}+^{9}Be→Ξ^{-}+p+^{8}Be)=(22.1±5.3_{stat}±4.5_{sys}) mb at the Ξ^{0} 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.
KW - Electrons
KW - Neutrons
KW - Cell Nucleus
KW - Motion
UR - https://pubmed.ncbi.nlm.nih.gov/37418739/
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85164266853&origin=inward
UR - https://elibrary.ru/item.asp?id=62742201
U2 - 10.1103/PhysRevLett.130.251902
DO - 10.1103/PhysRevLett.130.251902
M3 - Article
C2 - 37418739
VL - 130
SP - 251902
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
ER -
ID: 68405742