TY - JOUR
T1 - First Study of Reaction Ξ0n → Ξ-p Using Ξ0 -Nucleus Scattering at an Electron-Positron Collider
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Kalantar-Nayestanaki, N.
AU - Kappert, R.
AU - Kavatsyuk, M.
AU - Messchendorp, J.
AU - Rodin, V.
N1 - Funding Information:
The BESIII Collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts No. 2020YFA0406300, No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 11635010, No. 11735014, No. 11835012, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12022510, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12150004; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP); Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1832207; CAS Key Research Program of Frontier Sciences under Contracts No. QYZDJ-SSW-SLH003, No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union’s Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement under Contract No. 894790; German Research Foundation DFG under Contracts No. 443159800, No. 455635585, Collaborative Research Center CRC 1044, FOR5327, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation of Thailand under Contract No. B16F640076; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; The Royal Society, UK under Contract No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.
Publisher Copyright:
© 2023 authors. Published by the American Physical Society.
PY - 2023/6/21
Y1 - 2023/6/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85164266853&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.130.251902
DO - 10.1103/PhysRevLett.130.251902
M3 - Article
C2 - 37418739
SN - 0031-9007
VL - 130
JO - Physical Review Letters
JF - Physical Review Letters
IS - 25
M1 - 251902
ER -