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Evidence for the decays of ∧c^+→∑^+η and ∑^+η’

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摘要 We study the hadronic decays of ∧c^+ to the final states ∑^+η and ∑^+η, using an e^+e^- annihilation data sample of 567 pb^-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEPCII collider. We find evidence for the decays ∧^+→∑^+η and ∑^+η' and with statistical significance of and , respectively. Normalizing to the reference decays ∧^+→∑^+π^0 and ∑^+ω, we obtain the ratios of the branching fractions B(∧C^+→∑^+η)/V(∧^→∑^+π^0)and B(∧C^+→∑^+η)/B(∧C^+→∑^+ω)to be and , respectively. The upper limits at the 90% confidence level are set to be B(∧C^→∑^+η)/V(∧^+→∑^+π^0)<0.58 and B(∧C^+→∑^+η)/B(∧C^+→∑^+ω)<1.2. Using BESIII measurements of the branching fractions of the reference decays, we determine B(∧C^+→∑^+η)=(0.41±019±0.05)%(<0.68%) and B(∧C^+→∑^+η)=(1.34+0.53+0.19)%(<1.9%). Here, the first uncertainties are statistical and the second systematic. The obtained branching fraction of ∧C^+→∑^+η is consistent with the previous measurement, and the branching fraction of ∧C^+→∑^+η is measured for the first time.
作者 麦迪娜 M.N.Achasov S.Ahmed M.Albrecht M.Aleksee A.Amoroso 安芬芬 安琪 白羽 O.Bakina R. Baldini Ferroli 班勇 K.Begzsuren D.W.Bennett J.V.Bennett N.Berger M.Bertani D.Bettoni F.Bianchi I.Boyko R.A.Briere 蔡浩 蔡啸 O.Cakir A.Calcaterra 曹国富 S.A.Cetin J.Chai 常劲帆 W.L.Chang G.Chelkov 陈刚 陈和生 陈江川 陈玛丽 陈平亮 陈申见 陈元柏 成伟帅 G.Cibinetto F.Cossio 代洪亮 代建平 A.Dbeyssi D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇 董超 董静 董燎原 董明义 豆正磊 杜书先 段鹏飞 范荆州 方建 房双世 方易 R.Farinelli L.Fava S.Fegan F.Feldbauer G.Felici 封常青 M.Fritsch 傅成栋 付颖 高清 高鑫磊 高原宁 高勇贵 高榛 B.Garillon I.Garzia A.Gilman K.Goetzen 龚丽 龚文煊 W.Gradl M.Greco 谷立民 顾旻皓 顾运厅 郭爱强 郭立波 郭如盼 郭玉萍 A.Guskov Z.Haddadi 韩爽 郝喜庆 F.A.Harris 何康林 F.H.Heinsius T.Held 衡月昆 侯治龙 胡海明 胡继峰 胡涛 胡誉 黄光顺 黄金书 黄性涛 黄晓忠 黄智玲 T.Hussain N.Hu sken W.Ikegami Andersson M.Irshad 纪全 姬清平 季晓斌 季筱璐 江晓山 蒋兴雨 焦健斌 焦铮 金大鹏 金山 金毅 T.Johansson A.Julin N.Kalantar-Nayestanaki 康晓珅 M.Kavatsyuk 柯百谦 I.K.Keshk T.Khan A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kornicer M.Kuemmel M.Kuessner A.Kupsc M.Kurth W.Kuhn J.S.Lange P.Larin L.La M.Ablikim;F.F.An;Q.An;Y.Bai;Y.Ban;H.Cai;X.Cai;G.F.Cao;J.F.Chang;G.Chen;H.S.Chen;J.C.Chen;M.L.Chen;P.L.Chen;S.J.Chen;Y.B.Chen;W.Cheng;H.LDai;J.P.Dai;Z.Y.Deng;Y.Ding;C.Dong;J.Dong;L.Y.Dong;M.Y.Dong;Z.L.Dou;S.X.Du;P.F.Duan;J.Z.Fan;J.Fang;S.S.Fang;Y.Fang;C.Q.Feng;C.D.Fu;Y.Fu;Q.Gao;X.L.Gao;Y.Gao;Y.G.Gao;Z.Gao;L.Gong;W.X.Gong;L.M.Gu;M.H.Gu;Y.T.Gu;A.Q.Guo;L.B.Guo;R.P.Guo;Y.P.Guo;S.Han;X.Q.Hao;K.L.He;Y.K.Heng;Z.L.Hou;H.M.Hu;J.F.Hu;T.Hu;Y.Hu;G.S.Huang;J.S.Huang;X.T.Huang;X.Z.Huang;Z.L.Huang;Q.Ji;Q.P.Ji;X.B.Ji;X.L.Ji;X.S.Jiang;X.Y.Jiang;J.B.Jiao;Z.Jiao;D.P.Jin;S.Jin;Y.Jin;X.S.Kang;B.C.Ke;C.Li;Cheng Li;D.M.Li;F.Li;F.Y.Li;G.Li;H.B.Li;H.J.Li;J.C.Li;J.W.Li;Ke Li;Lei Li;P.L.Li;P.R.Li;Q.Y.Li;T.Li;W.D.Li;W.G.Li;X.L.Li;X.N. Li;X.Q.Li;Z.B.Li;H.Liang;Y.F.Liang;Y.T.Liang;G.R.Liao;L.Z.Liao;C.X.Lin;D.X.Lin;B.Liu;B.J.Liu;C.X.Liu;D.Liu;D.Y.Liu;F.H.Liu;Fang Liu;Feng Liu;H.B.Liu;H.L.Liu;H.M.Liu;Huanhuan Liu;Huihui Liu;J.B.Liu;J.Y.Liu;K.Liu;K.Y.Liu;Ke Liu;Q.Liu;S.B.Liu;X.Liu;Y.B.Liu;Z.A.Liu;Zhiqing Liu;Y.F.Long;X.C.Lou;H.J.Lu;J.D.Lu;J.G.Lu;Y.Lu;Y.P.Lu;C.L.Luo;M.X.Luo;T.Luo;X.L.Luo;X.R.Lyu;F.C.Ma;H.L.Ma;L.L.Ma;M.M.Ma;Q.M.Ma;X.N.Ma;X.X.Ma;X.Y.Ma;Y.M.Ma;Y.J.Mao;Z.P.Mao;Z.X.Meng;J.Min;T.J.Min;X.H.Mo;Y.J.Mo;Z.Ning;S.L.Niu;S.L.Olsen;Q.Ouyang;Y.Pan;H.P.Peng;J.L.Ping;R.G.Ping;H.R.Qi;M.Qi;T.Y.Qi;S.Qian;C.F.Qiao;N.Qin;Z.H.Qin;J.F.Qiu;S.Q.Qu;G.Rong;W.Shan;X.Y.Shan;M.Shao;C.P. Shen;P.X.Shen;X.Y.Shen;H.Y.Sheng;X.Shi;J.J.Song;X.Y.Song;G.X.Sun;J.F.Sun;L.Sun;S.S.Sun;X.H.Sun;Y.J.Sun;Y.K.Sun;Y.Z.Sun;Z.J.Sun;Z.T.Sun;Y.T.Tan;C.J.Tang;G.Y.Tang;X.Tang;B.Wang;B.L.Wang;C.W.Wang;D.Y.Wang;Dan Wang;K.Wang;L.L.Wang;L.S.Wang;M.Wang;Meng Wang;P.Wang;P.L.Wang;W.P.Wang;X.F.Wang;Y.Wang;Y.F.Wang;Z.Wang;Z.G.Wang;Z.Y.Wang;Zongyuan Wang;D.H.Wei;S.P.Wen;L.H.Wu;L.J.Wu;Z.Wu;L.Xia;Y.Xia;D.Xiao;Y.J.Xiao;Z.J.Xiao;Y.G.Xie;Y.H.Xie;X.A.Xiong;Q.L.Xiu;G.F.Xu;J.J.Xu;L.Xu;Q.J.Xu;Q.N.Xu;X.P.Xu;F.Yan;L.Yan;w.B.Yan;W.C.Yan;Y.H.Yan;H.J.Yang;H.X.Yang;L.Yang;S.L.Yang;Y.H.Yang;Y.X.Yang;Yifan Yang;Z.Q.Yang;M.Ye;M.H.Ye;J.H.Yin;Z.Y.You;B.X.Yu;C.X.Yu;J.S.Yu;C.Z.Yuan;Y.Yuan;Y.Zeng;B.X.Zhang;B.Y.Zhang;
出处 《中国物理C:英文版》 SCIE CAS CSCD 2019年第8期15-23,共9页 Chinese Physics C
基金 National Key Basic Research Program of China (2015CB856700) National Natural Science Foundation of China (NSFC)(11235011,11275266,11335008,11425524,11625523,11635010) the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program the CAS Center for Excellence in Particle Physics (CCEPP) Joint Large-Scale Scientific Facility Funds of the NSFC and CAS (U1332201,U1532257,U1532258) CAS (KJCX2-YW-N29,KJCX2-YW-N45,QYZDJ-SSW-SLH003) 100 Talents Program of CAS National 1000 Talents Program of China INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology German Research Foundation DFG (Collaborative Research Center CRC 1044,FOR 2359) Istituto Nazionale di Fisica Nucleare,Italy Koninklijke Nederlandse Akademie van Wetenschappen (KNAW)(530-4CDP03) Ministry of Development of Turkey (DPT2006K-120470) National Science and Technology fund The Swedish Research Council U. S. Department of Energy under (DE-FG02-05ER41374,DE-SC-0010118,DE-SC-0010504,DE-SC-0012069) University of Groningen (RuG) the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI),Darmstadt WCU Program of National Research Foundation of Korea (R32-2008-000-10155-0).
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