Электронный каталог

Статья

Ablikim, M.
First Study of Reaction *X*0n *> *X*-p Using *X*0-Nucleus Scattering at an Electron-Positron Collider / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, S.Pogodin, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review Letters [Electronic resource]. – 2023. – Vol.130, No.25. – P.251902. – URL: https://doi.org/10.1103/PhysRevLett.130.251902. – Bibliogr.:65.

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→Ξ0¯Ξ0 and the neutron is a component of the 9Be, 12C, and 197Au nuclei in the beam pipe. A clear signal is observed with a statistical significance of 7.1σ. The cross section of the reaction Ξ0+9Be→Ξ−+p+8Be is determined to be σ(Ξ0+9Be→Ξ−+p+8Be)=(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.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки