M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. H. An, Y. Bai, O. Bakina, Y. Ban, H. R. Bao, X. L. Bao, Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. B. Bertani, D BETTONI, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, M. H. Cai, X. Cai, A Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, X. Y. Chai, J. F. Chang, T. T. Chang, G. R. Che, Y. Z. Che, C Chen, C Chen, G. Chen, H S Chen, H S Chen, M. L. Chen, S. M. Chen, S. M. Chen, T T Chen, W. Chen, X. R. Chen, X. R. Chen, X. Y. Chen, Y. B. Chen, Y. B. Chen, Z. K. Chen, J. Cheng, Lei Cheng, S. K. Choi, X. Chu, G. Cibinetto, F. Cossio, J. Cottee-Meldrum, H. L. Dai, J. P. Dai, X. C. Dai, A. Dbeyssi, R. E. de Boer, F. De Mori, D. Dedovich, C. Q. Deng, Z. Y. Deng, A. Denig, I. Denisenko, M. Destefanis, X. X. Ding, Y. Ding, Yan Ding, Y. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, M. C. Du, S. X. Du, Shaoxu Du, X. L. Du, Y. Q. Du, Y. Y. Duan, Z. H. Duan, P. Egorov, G. F. Fan, J. J. Fan, Y. H. Fan, J. Fang, Jin Fang, S. S. Fang, W. X. Fang, Y. Q. Fang, L. Fava, F Feldbauer, G. Felici
A bstract Based on a data sample corresponding to an integrated luminosity of 6.4 fb − 1 of e + e − annihilation and collected with the BESIII detector at 13 center-of-mass energy points ranging between 4.600 GeV and 4.950 GeV, we report the first observation of the singly Cabibbo-suppressed decay $$ {\Lambda}_c^{+}\to {\Sigma}^0{K}_S^0{\pi}^{+} $$ Λ c + → Σ 0 K S 0 π + with a statistical significance of 5.9 σ . The branching fraction is determined to be $$ B\left({\Lambda}_c^{+}\to {\Sigma}^0{K}_S^0{\pi}^{+}\right)=\left(0.58\pm 0.{14}_{\mathrm{stat}.}\pm 0.0{4}_{\mathrm{syst}.}\right)\times 1{0}^{-3} $$ B Λ c + → Σ 0 K S 0 π + = 0.58 ± 0 . 14 stat . ± 0.0 4 syst . × 1 0 − 3 . In addition, the decay $$ {\Lambda}_c^{+}\to {\Sigma}^0{K}_S^0{K}^{+} $$ Λ c + → Σ 0 K S 0 K + has also been investigated, and the evidence for this decay is obtained with a statistical significance of 3.7 σ .