arXiv · 1705.11109
Observation of the decay $\Lambda_c^+\rightarrow \Sigma^- \pi^+\pi^+\pi^0$
Abstract
We report the first observation of the decay $\Lambda^+_{c}\rightarrow \Sigma^- \pi^+\pi^+\pi^0$, based on data obtained in $e^+e^-$ annihilations with an integrated luminosity of 567~pb$^{-1}$ at $\sqrt{s}=4.6$~GeV. The data were collected with the BESIII detector at the BEPCII storage rings. The absolute branching fraction $\mathcal{B}(\Lambda^+_{c}\rightarrow\Sigma^-\pi^+\pi^+\pi^0)$ is determined to be $(2.11\pm0.33({\rm stat.})\pm0.14({\rm syst.}))\%$. In addition, an improved measurement of $\mathcal{B}(\Lambda^+_{c}\rightarrow\Sigma^-\pi^+\pi^+)$ is determined as $(1.81\pm0.17({\rm stat.})\pm0.09({\rm syst.}))\%$.
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BESIII Collaboration, M Ablikim, M N Achasov, S Ahmed, M Albrecht, A Amoroso, F F An, Q An, J Z Bai, O Bakina, R Baldini Ferroli, Y Ban, D W Bennett, J V Bennett, N Berger, M Bertani, D Bettoni, J M Bian, F Bianchi, E Boger, I Boyko, R A Briere, H Cai, X Cai, O Cakir, A Calcaterra, G F Cao, S A Cetin, J Chai, J F Chang, G Chelkov, G Chen, H S Chen, J C Chen, M L Chen, S J Chen, X R Chen, Y B Chen, X K Chu, G Cibinetto, H L Dai, J P Dai, A Dbeyssi, D Dedovich, Z Y Deng, A Denig, I Denysenko, M Destefanis, F De Mori, Y Ding, C Dong, J Dong, L Y Dong, M Y Dong, O Dorjkhaidav, Z L Dou, S X Du, P F Duan, J Fang, S S Fang, X Fang, Y Fang, R Farinelli, L Fava, S Fegan, F Feldbauer, G Felici, C Q Feng, E Fioravanti, M Fritsch, C D Fu, Q Gao, X L Gao, Y Gao, Y G Gao, Z Gao, I Garzia, K Goetzen, L Gong, W X Gong, W Gradl, M Greco, M H Gu, S Gu, Y T Gu, A Q Guo, L B Guo, R P Guo, Y P Guo, Z Haddadi, S Han, X Q Hao, F A Harris, K L He, X Q He, F H Heinsius, T Held, Y K Heng, T Holtmann, Z L Hou. 2017-05-31. Observation of the decay $\Lambda_c^+\rightarrow \Sigma^- \pi^+\pi^+\pi^0$. https://doi.org/10.1016/j.physletb.2017.06.065
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