Li, L. K.Kinoshita, K.Adachi, I.Ahn, J. K.Aihara, H.Al Said, S.Asner, D. M.Aushev, T.Ayad, R.Babu, V.Bahinipati, S.Banerjee, SwBehera, P.Belous, K.Bennett, J.Bessner, M.Bhuyan, B.Bilka, T.Biswas, D.Bobrov, A.Bodrov, D.Bonvicini, G.Borah, J.Bozek, A.Bra, M.Branchini, P.Browder, T. E.Budano, A.Campajola, M.Chang, M. -C.Chen, A.Cheon, B. G.Chilikin, K.Cho, K.Cho, S. -J.Choi, Y.Choudhury, S.Cinabro, D.Das, S.De Nardo, G.De Pietro, G.Dhamija, R.Di Capua, F.Dingfelder, J.Dolezal, Z.Dong, T. V.Epifanov, D.Ferber, T.Ferlewicz, D.Fulsom, B. G.Garg, R.Gaur, V.Garmash, A.Giri, A.Goldenzweig, P.Golob, B.Gong, G.Graziani, E.Guan, Y.Gudkova, K.Hadjivasiliou, C.Halder, S.Han, X.Hayasaka, K.Hayashii, H.Hedges, M. T.Hou, W. -S.Hsu, C. -L.Inami, K.Ipsita, N.Ishikawa, A.Itoh, R.Iwasaki, M.Jacobs, W. W.Jang, E. -J.Ji, Q. P.Jia, S.Jin, Y.Joo, K. K.Kang, K. H.Kawasaki, T.Kim, C. H.Kim, D. Y.Kim, K. -H.Kim, Y. -K.Kodys, P.Korobov, A.Korpar, S.Kovalenko, E.Krizan, P.Krokovny, P.Kuhr, T.Kumar, M.Kumar, R.Kumara, K.Kwon, Y. -J.Lam, T.Lange, J. S.Lee, S. C.Li, C. H.Li, S. X.Li, Y.Li, Y. B.Li Gioi, L.Libby, J.Lieret, K.Lin, Y. -R.Liventsev, D.Luo, T.Masuda, M.Matsuda, T.Matvienko, D.Maurya, S. K.Meier, F.Merola, M.Metzner, F.Miyabayashi, K.Mizuk, R.Mussa, R.Nakamura, I.Nakano, T.Nakano, M.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Nisar, N. K.Nishida, S.Ogawa, S.Ono, H.Pakhlov, P.Pakhlova, G.Pardi, S.Park, H.Park, J.Passeri, A.Patra, S.Paul, S.Pestotnik, R.Piilonen, Leo E.Podobnik, T.Prencipe, E.Prim, M. T.Rostomyan, A.Rout, N.Russo, Y.Sakai, G.Sandilya, S.Savinov, V.Schnell, G.Schueler, J.Schwanda, C.Schwartz, A. J.Seino, Y.Senyo, K.Sevior, M. E.Shan, W.Shapkin, M.Sharma, C.Shen, C. P.Shiu, J. -G.Simon, F.Singh, J. B.Solovieva, E.Staric, M.Strube, J. F.Sumihama, M.Sumiyoshi, T.Takizawa, M.Tamponi, U.Tang, S. S.Tanida, K.Tenchini, F.Uchida, M.Uglov, T.Unno, Y.Uno, K.Uno, S.Urquijo, P.Vahsen, S. E.van Tonder, R.Varner, G.Varvell, K. E.Vinokurova, A.Vossen, A.Wang, D.Wang, M. -Z.Wang, X. L.Watanabe, M.Watanuki, S.Werbycka, O.Wiechczynski, J.Won, E.Xu, X.Yabsley, B. D.Yan, W.Yang, S. B.Yelton, J.Yin, J. H.Yuan, C. Z.Yuan, L.Yusa, Y.Zhang, Z. P.Zhilich, V.Zhukova, V.2024-01-222024-01-222023-02-152470-0010https://hdl.handle.net/10919/117449We present a study of a singly Cabibbo-suppressed decay Λc+→pKS0KS0 and a Cabibbo-favored decay Λc+→pKS0η based on 980 fb-1 of data collected by the Belle detector, operating at the KEKB energy-asymmetric e+e- collider. We measure their branching fractions relative to Λc+→pKS0: B(Λc+→pKS0KS0)/B(Λc+→pKS0)=(1.48±0.08±0.04)×10-2 and B(Λc+→pKS0η)/B(Λc+→pKS0)=(2.73±0.06±0.13)×10-1. Combining with the world average B(Λc+→pKS0), we have the absolute branching fractions, B(Λc+→pKS0KS0)=(2.35±0.12±0.07±0.12)×10-4 and B(Λc+→pKS0η)=(4.35±0.10±0.20±0.22)×10-3. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on B(Λc+→pKS0). The mode Λc+→pKS0KS0 is observed for the first time and has a statistical significance of >10σ. The branching fraction of Λc+→pKS0η has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average.9 page(s)application/pdfenIn CopyrightArticle - Refereedhttps://doi.org/10.1103/PhysRevD.107.0320041073Piilonen, Leo [0000-0001-6836-0748]2470-0029