Ablikim, M.Achasov, M. N.Adlarson, P.Ai, X. C.Aliberti, R.Amoroso, A.Çetin, Serkant Ali2024-05-192024-05-1920242470-00102470-0029https://doi.org10.1103/PhysRevD.109.012006https://hdl.handle.net/20.500.12713/5843The first observation of the decays J=iy -> p over bar r+K0S and J=iy -> pr over bar -K0S is reported using (10087 +/- 44) x 106 J=iy events recorded by the BESIII detector at the BEPCII storage ring. The branching fractions of each channel are determined to be B(J=iy -> p over bar r+K0S) = (1.361 +/- 0.006 +/- 0.025) x 10-4, and B(J=iy -> pr over bar -K0S) = (1.352 +/- 0.006 +/- 0.025) x 10-4. The combined result is B(J=iy -> p over bar r+K0S+ c:c:) = (2.725 +/- 0.009 +/- 0.050) x 10-4, where the first uncertainty is statistical and the second systematic. The results presented are in good agreement with the branching fractions of the isospin partner decay J=iy -> pK-r over bar 0 + c:c:eninfo:eu-repo/semantics/openAccess[No Keywords]Article1091WOS:0011832351000012-s2.0-85182585614N/A10.1103/PhysRevD.109.012006Q1