First Measurement of the $Λ_c^+ \to p η'$ decay
Creators: name: Belle Collaboration
name: Li, S. X.
name: Cui, J. X.
name: Shen, C. P.
name: Adachi, I.
name: Aihara, H.
name: Said, S. Al
name: Asner, D. M.
name: Atmacan, H.
name: Aushev, T.
name: Ayad, R.
name: Babu, V.
name: Behera, P.
name: Belous, K.
name: Bessner, M.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bilka, T.
name: Bodrov, D.
name: Bonvicini, G.
name: Borah, J.
name: Bozek, A.
name: Bracko, M.
name: Branchini, P.
name: Browder, T. E.
name: Budano, A.
name: Campajola, M.
name: Cervenkov, D.
name: Chang, M. -C.
name: Chang, P.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Cho, H. E.
name: Cho, K.
name: Cho, S. -J.
name: Choi, S. -K.
name: Choi, Y.
name: Choudhury, S.
name: Cinabro, D.
name: Cunliffe, S.
name: Das, S.
name: Dash, N.
name: De Nardo, G.
name: De Pietro, G.
name: Dhamija, R.
name: Di Capua, F.
name: Dolezal, Z.
name: Dong, T. V.
name: Epifanov, D.
name: Ferber, T.
name: Ferlewicz, D.
name: Fulsom, B. G.
name: Garg, R.
name: Gaur, V.
name: Gabyshev, N.
name: Giri, A.
name: Goldenzweig, P.
name: Golob, B.
name: Graziani, E.
name: Gu, T.
name: Hara, T.
name: Hayasaka, K.
name: Hayashii, H.
name: Hou, W. -S.
name: Inami, K.
name: Ishikawa, A.
name: Iwasaki, M.
name: Iwasaki, Y.
name: Jacobs, W. W.
name: Jang, E. -J.
name: Jia, S.
name: Jin, Y.
name: Joo, K. K.
name: Kahn, J.
name: Kaliyar, A. B.
name: Kang, K. H.
name: Kato, Y.
name: Kawasaki, T.
name: Kichimi, H.
name: Kiesling, C.
name: Kim, C. H.
name: Kim, D. Y.
name: Kim, Y. -K.
name: Kinoshita, K.
name: Kodys, P.
name: Konno, T.
name: Korobov, A.
name: Korpar, S.
name: Kovalenko, E.
name: Krizan, P.
name: Kroeger, R.
name: Krokovny, P.
name: Kumar, M.
name: Kumar, R.
name: Kumara, K.
name: Kwon, Y. -J.
name: Lam, T.
name: Laurenza, M.
name: Lee, S. C.
name: Li, J.
name: Li, L. K.
name: Li, Y.
name: Gioi, L. Li
name: Libby, J.
name: Liventsev, D.
name: Martini, A.
name: Masuda, M.
name: Matsuda, T.
name: Matvienko, D.
name: Maurya, S. K.
name: Meier, F.
name: Merola, M.
name: Miyabayashi, K.
name: Mizuk, R.
name: Mussa, R.
name: Nakao, M.
name: Narwal, D.
name: Natkaniec, Z.
name: Natochii, A.
name: Nayak, L.
name: Nisar, N. K.
name: Nishida, S.
name: Nishimura, K.
name: Ogawa, K.
name: Ogawa, S.
name: Ono, H.
name: Oskin, P.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pang, T.
name: Pardi, S.
name: Park, S. -H.
name: Patra, S.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Piilonen, L. E.
name: Podobnik, T.
name: Popov, V.
name: Prim, M. T.
name: Rohrken, M.
name: Rostomyan, A.
name: Rout, N.
name: Russo, G.
name: Sahoo, D.
name: Sandilya, S.
name: Sangal, A.
name: Sanuki, T.
name: Savinov, V.
name: Schnell, G.
name: Schueler, J.
name: Schwanda, C.
name: Schwartz, A. J.
name: Seino, Y.
name: Senyo, K.
name: Sevior, M. E.
name: Shapkin, M.
name: Sharma, C.
name: Shebalin, V.
name: Shiu, J. -G.
name: Shwartz, B.
name: Simon, F.
name: Solovieva, E.
name: Stanic, S.
name: Staric, M.
name: Stottler, Z. S.
name: Sumihama, M.
name: Sumisawa, K.
name: Sumiyoshi, T.
name: Sutcliffe, W.
name: Takizawa, M.
name: Tamponi, U.
name: Tanida, K.
name: Tenchini, F.
name: Trabelsi, K.
name: Uchida, M.
name: Unno, Y.
name: Uno, K.
name: Uno, S.
name: Urquijo, P.
name: Vahsen, S. E.
name: Van Tonder, R.
name: Varner, G.
name: Vinokurova, A.
name: Waheed, E.
name: Wang, D.
name: Wang, E.
name: Wang, M. -Z.
name: Watanuki, S.
name: Won, E.
name: Xu, X.
name: Yabsley, B. D.
name: Yan, W.
name: Ye, H.
name: Yin, J. H.
name: Yusa, Y.
name: Zhai, Y.
name: Zhilich, V.
name: Zhukova, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay $Λ_c^+ \to p η'$ with $η' \to ηπ^+π^-$, using a data sample corresponding to an integrated luminosity of 981 $\rm fb^{-1}$, collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. A significant $Λ_c^+$ signal is observed for the first time with a signal significance of 5.4$σ$. The relative branching fraction with respect to the normalization mode $Λ_c^+ \to pK^-π^+$ is measured to be \begin{equation*} \frac{{\cal B}(Λ_c^+ \to p η')}{{\cal B}(Λ_c^+ \to p K^-π^+)} = (7.54 \pm 1.32 \pm 0.75) \times 10^{-3}, \end{equation*} where the uncertainties are statistical and systematic, respectively. Using the world-average value of ${\cal B}(Λ_c^+ \to p K^-π^+) = (6.28\pm0.32)\times10^{-2}$, we obtain \begin{equation*} {\cal B}(Λ_c^+ \to p η') = (4.73 \pm 0.82 \pm 0.47 \pm 0.24)\times 10^{-4}, \end{equation*} where the uncertainties are statistical, systematic, and from ${\cal B}(Λ_c^+ \to pK^-π^+)$, respectively.
description: 14 pages, 2 figures, accepted for publication in JHEP