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Search for Baryon and Lepton Number Violation in J/psitoΛ_c^+e^-+c.c.

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arxiv 1803.04789 v1 pith:POSBHS3F submitted 2018-03-13 hep-ex

Search for Baryon and Lepton Number Violation in J/psitoΛ_c^+e^-+c.c.

M.Ablikim , M.N.Achasov , S.Ahmed , M.Albrecht , A.Amoroso , F.F.An , Q.An , J.Z.Bai
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Y.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 P.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.DeMori Y.Ding C.Dong J.Dong L.Y.Dong M.Y.Dong 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 C.Hu H.M.Hu T.Hu Y.Hu G.S.Huang J.S.Huang X.T.Huang X.Z.Huang Z.L.Huang T.Hussain W.Ikegami Andersson 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 T.Johansson A.Julin N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk B.C.Ke T.Khan A.Khoukaz P.Kiese R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kornicer M.Kuemmel M.Kuessner M.Kuhlmann A.Kupsc W.K\"uhn J.S.Lange M.Lara P.Larin L.Lavezzi S.Leiber H.Leithoff C.Leng C.Li ChengLi D.M.Li F.Li F.Y.Li G.Li H.B.Li H.J.Li J.C.LI J.Q.Li K.J.Li KangLi KeLi LeiLi 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 D.X.Lin B.Liu B.J.Liu C.X.Liu D.Liu F.H.Liu FangLiu FengLiu H.B.Liu H.M.Liu HuanhuanLiu HuihuiLiu J.B.Liu J.P.Liu J.Y.Liu K.Liu K.Y.Liu KeLiu L.D.Liu P.L.Liu Q.Liu S.B.Liu X.Liu Y.B.Liu Z.A.Liu ZhiqingLiu Y.F.Long X.C.Lou H.J.Lu J.G.Lu Y.LU Y.P.Lu C.L.Luo M.X.Luo X.L.Luo X.R.Lyu F.C.Ma H.L.Ma L.L.Ma M.M.Ma Q.M.Ma T.Ma X.N.Ma X.Y.Ma Y.M.Ma F.E.Maas M.Maggiora Q.A.Malik Y.J.Mao Z.P.Mao S.Marcello Z.X.Meng J.G.Messchendorp G.Mezzadri J.Min T.J.Min R.E.Mitchell X.H.Mo Y.J.Mo C.Morales Morales G.Morello N.Yu.Muchnoi H.Muramatsu P.Musiol A.Mustafa Y.Nefedov F.Nerling I.B.Nikolaev Z.Ning S.Nisar S.L.Niu X.Y.Niu S.L.Olsen Q.Ouyang S.Pacetti Y.Pan M.Papenbrock P.Patteri M.Pelizaeus J.Pellegrino H.P.Peng K.Peters J.Pettersson J.L.Ping R.G.Ping A.Pitka R.Poling V.Prasad H.R.Qi M.Qi S.Qian C.F.Qiao N.Qin X.S.Qin Z.H.Qin J.F.Qiu Z.Y.Qu K.H.Rashid C.F.Redmer M.Richter M.Ripka M.Rolo G.Rong Ch.Rosner X.D.Ruan A.Sarantsev M.Savri\'e C.Schnier K.Schoenning W.Shan M.Shao C.P.Shen P.X.Shen X.Y.Shen H.Y.Sheng J.J.Song W.M.Song X.Y.Song S.Sosio C.Sowa S.Spataro G.X.Sun J.F.Sun L.Sun S.S.Sun X.H.Sun Y.J.Sun Y.KSun Y.Z.Sun Z.J.Sun Z.T.Sun C.J.Tang G.Y.Tang X.Tang I.Tapan M.Tiemens B.Tsednee I.Uman G.S.Varner B.Wang B.L.Wang D.Wang D.Y.Wang DanWang K.Wang L.L.Wang L.S.Wang M.Wang MengWang P.Wang P.L.Wang W.P.Wang X.F.Wang Y.Wang Y.D.Wang Y.F.Wang Y.Q.Wang Z.Wang Z.G.Wang Z.H.Wang Z.Y.Wang ZongyuanWang T.Weber D.H.Wei P.Weidenkaff S.P.Wen U.Wiedner M.Wolke L.H.Wu L.J.Wu Z.Wu L.Xia X.Xia Y.Xia D.Xiao H.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 L.Yan W.B.Yan W.C.Yan Y.H.Yan H.J.Yang H.X.Yang L.Yang Y.H.Yang Y.X.Yang YifanYang 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 A.Yuncu A.A.Zafar A.Zallo Y.Zeng Z.Zeng B.X.Zhang B.Y.Zhang C.C.Zhang D.H.Zhang H.H.Zhang H.Y.Zhang J.Zhang J.L.Zhang J.Q.Zhang J.W.Zhang J.Y.Zhang J.Z.Zhang K.Zhang K.L.Zhang L.Zhang S.Q.Zhang X.Y.Zhang Y.H.Zhang Y.T.Zhang YangZhang YaoZhang YuZhang Z.H.Zhang Z.P.Zhang Z.Y.Zhang G.Zhao J.W.Zhao J.Y.Zhao J.Z.Zhao LeiZhao LingZhao M.G.Zhao Q.Zhao S.J.Zhao T.C.Zhao Y.B.Zhao Z.G.Zhao A.Zhemchugov B.Zheng J.P.Zheng W.J.Zheng Y.H.Zheng B.Zhong L.Zhou X.Zhou X.K.Zhou X.R.Zhou X.Y.Zhou Y.X.Zhou J.Zhu K.Zhu K.J.Zhu S.Zhu S.H.Zhu X.L.Zhu Y.C.Zhu Y.S.Zhu Z.A.Zhu J.Zhuang B.S.Zou J.H.Zou
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classification hep-ex
keywords lambdabaryonleptonnumberprocesssearchtimes10beijing
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Using $1.31\times10^9$ $J/\psi$ events collected by the BESIII detector at the Beijing Electron Positron Collider, we search for the process $J/\psi\to\Lambda_c^+e^-+c.c.$ for the first time. In this process, both baryon and lepton number conservation is violated. No signal is found and the upper limit on the branching fraction $\mathcal{B}(J/\psi\to\Lambda_c^+e^-+c.c.)$ is set to be $6.9\times10^{-8}$ at the 90\% Confidence Level.

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