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arXiv · 2108.11301

Measurement of the branching fraction of $\Lambda_c^+ \to p \omega$ decay at Belle

Belle Collaboration·S. X. Li·L. K. Li·C. P. Shen·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·T. Aushev·P. Behera·K. Belous·J. Bennett·M. Bessner·V. Bhardwaj·B. Bhuyan·T. Bilka·J. Biswal·A. Bobrov·D. Bodrov·J. Borah·A. Bozek·M. Bračko·P. Branchini·T. E. Browder·A. Budano·M. Campajola·D. Červenkov·M. -C. Chang·P. Chang·A. Chen·B. G. Cheon·K. Chilikin·H. E. Cho·K. Cho·S. -J. Cho·S. -K. Choi·Y. Choi·S. Choudhury·D. Cinabro·S. Cunliffe·S. Das·G. De Nardo·G. De Pietro·R. Dhamija·F. Di Capua·Z. Doležal·T. V. Dong·D. Epifanov·T. Ferber·B. G. Fulsom·R. Garg·V. Gaur·N. Gabyshev·A. Giri·P. Goldenzweig·B. Golob·E. Graziani·T. Gu·Y. Guan·K. Gudkova·C. Hadjivasiliou·S. Halder·O. Hartbrich·K. Hayasaka·H. Hayashii·W. -S. Hou·C. -L. Hsu·T. Iijima·K. Inami·A. Ishikawa·R. Itoh·M. Iwasaki·Y. Iwasaki·W. W. Jacobs·S. Jia·Y. Jin·K. K. Joo·A. B. Kaliyar·K. H. Kang·Y. Kato·H. Kichimi·C. H. Kim·D. Y. Kim·K. -H. Kim·K. T. Kim·Y. -K. Kim·K. Kinoshita·P. Kodyš·T. Konno·A. Korobov·S. Korpar·E. Kovalenko·P. Križan·R. Kroeger·P. Krokovny·R. Kumar·K. Kumara·Y. -J. Kwon·Y. -T. Lai·J. S. Lange
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Abstract

Using 980.6 $\rm fb^{-1}$ of data collected with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we present a measurement of the branching fraction of the singly Cabibbo-suppressed decay $\Lambda_c^+ \to p \omega$. A clear $\Lambda_c^+$ signal is observed for $\Lambda_c^+ \to p \omega$ with a statistical significance of 9.1 standard deviations, and we measure the ratio of branching fractions ${\cal B}(\Lambda_c^+ \to p \omega)/{\cal B}(\Lambda_c^+ \to p K^- \pi^+) = (1.32 \pm 0.12 (\rm stat) \pm 0.10 (\rm syst))\times 10^{-2}$, from which we infer the branching fraction ${\cal B}(\Lambda_c^+ \to p \omega) = (8.27 \pm 0.75 (\rm stat) \pm 0.62 (\rm syst) \pm 0.42 (\rm ref))\times 10^{-4}$. The first quoted uncertainty is statistical, the second systematic, and the third from the reference mode $\Lambda_c^+ \to p K^- \pi^+$.

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Belle Collaboration, S. X. Li, L. K. Li, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. -C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, Y. Kato, H. Kichimi, C. H. Kim, D. Y. Kim, K. -H. Kim, K. T. Kim, Y. -K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, R. Kumar, K. Kumara, Y. -J. Kwon, Y. -T. Lai, J. S. Lange. 2021-08-25. Measurement of the branching fraction of $\Lambda_c^+ \to p \omega$ decay at Belle. https://doi.org/10.1103/physrevd.104.072008

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