6533b86efe1ef96bd12ccabb

RESEARCH PRODUCT

Search for the Lepton Flavor Violation Process J/ψ→eμ at BESIII

B. SpruckE. H. ThorndikeS. L. OlsenRoy A. BriereL. Q. QinKai LiuJ. P. DaiC. L. MaX. S. JiangY. NefedovM. H. GuH. Y. ShengShou-hua ZhuShan WangW. GradlC. X. YuO. CakirA. ZalloZ. G. ZhaoP. L. WangZ. G. WangYang QinB. S. ZouG. S. VarnerB. ZhengR. G. PingJ. MinH. B. LiuY. H. GuanC. GengQi-wen LüM. Y. DongB. KopfK. L. HeL. HuangX. T. LiaoDaniel P Cronin-hennessyN. WuKrisztian PetersM. QiHang LiuZ. J. SunH. LoehnerY. X. XiaH. Y. ZhangZhiqing LiuXiangdong RuanQ. LiuLei ZhaoX. LiuM. MaggioraLing ZhaoZ. Y. HeH. B. LiuG. F. ChenX. Q. LiJ. H. ZouZhiqiang LiuMiao HeM. GrecoJ. F. ChangZ. A. LiuL. G. XiaZ. L. HouYang YangR. Baldini FerroliA. Q. GuoD. J. AmbroseD. Y. WangS. B. LiuZ. J. XiaoX. T. HuangJ. Y. ZhangY. P. GuoO. FuksM. AblikimA. A. ZafarB. Q. WangG. RongY. BanP. WeidenkaffS. S. SunJ. C. LiJifeng HuL. P. ZhouC. P. ShenI. UmanX. L. JiS. P. YuX. CaiX. R. LiC. NicholsonJ. ZhuangS. P. WenY. H. ZhengG. M. XuR. ZhangX. S. QinX. R. ZhouT. GuoZ. P. MaoSerkant Ali CetinM. H. YeQ. L. XiuTalib HussainH. S. ChenM. X. LuoQ. J. XuJ. F. SunCong-feng QiaoO. AlbayrakJian WeiYucheng HuangD. V. DedovichJ. L. FuMeng WangK. Y. LiuM. KornicerH. P. ChengC. Z. YuanJ. FangY. K. HengW. M. SongG. R. LiaoCheng LiC. HuN. Yu. MuchnoiJürgen BeckerX. TangD. X. LinY. ZengZ. NingK. X. ZhaoR. E. MitchellE. PrencipeQ. P. JiF. LiHeng-yun YeY. H. ZhangF. C. MaAlexey ZhemchugovH. M. HuJ. M. BianZhenyu ZhangG. F. XuZhe SunW. LaiF. F. JingX. N. LiZhenli XuK. LiG. X. SunS. QianJialun PingFang LiuLi YanY. F. WangL. Y. DongL. H. WuC. S. JiQ. G. WenS. JinJ. W. ZhangHaiping PengHai YuS. H. ZhangX. Y. ShenX. K. ZhouH. LiangS. X. DuQ. OuyangZ. Y. WangY. B. ChenXiaofeng ZhuJ. Z. ZhangI. DenysenkoX. Y. ZhangQ. P. JiZ. JiaoFu-hu LiuD. H. ZhangH. B. LiX. Y. MaH. MoeiniJ. F. QiuS. S. FangW. D. LiW. X. GongM. UllrichY.n. GaoA. G. DenigC. L. LuoJ. C. ChenXuanhong LouL. FavaKe WangC. C. ZhangQun-yao WangFeng LiuNasser Kalantar-nayestanakiLili ZhangY. B. LiuY. J. SunB. Y. ZhangC. Morales MoralesY. DingX. Y. SongS. MaM. LeyheZ. H. QinB. ZhongL. B. GuoQ. M. MaLei LiUlrich WiednerFeng XueCui LiChuan LiuH. H. ZhangG. A. ChelkovW. M. DingD. TothR. PolingC. H. LiV. V. BytevY. YuanY. S. ZhuG. R. LuFenfen AnP. L. WangK. J. ZhuI. TapanZ. P. ZhangS. L. LiY. H. YanL. L. JiangXuantong ZhangJ. B. JiaoX. L. LuoZ. A. ZhuSanfeng WuP. LarinT. C. ZhaoY. T. LiangM. G. ZhaoZujian WangK. MoriyaZ. B. LiJ. W. ZhaoJ. S. HuangY. C. ZhuW. B. YanC. X. LiuY. M. ZhuM. N. AchasovZhenghao ZhangF. A. HarrisY. L. HanW. G. LiChi ZhangBrent J. LiuS. J. ChenX. H. ZhaoM. KavatsyukD. H. SunX. H. MoL. S. WangS. PacettiTao LuoJ. V. BennettO. BondarenkoM. H. YeY. B. ZhaoK. GoetzenHongsheng ZhaoS. SpataroX. P. XuC. ZhuW. KuehnB. X. YuXuejun WangL. L. WangH. CaiB. X. ZhangJ. Q. ZhangE. BogerT. HeldX. L. WangY. Q. WangC. J. TangH. M. LiuY. P. LuJianping ZhengI. B. NikolaevShujun ZhaoG. F. CaoH. L. DaiIgor BoykoK. H. RashidM. ShaoY. T. GuH. J. LuM. LvJ. G. LuZ. XueYao WangH. X. YangM. DestefanisQ. J. LiF. E. MaasT. HuQ. A. MalikHuihui LiuA. SarantsevD. H. WeiJ. P. LiuJ. S. LangeJ. G. MesschendorpG. S. HuangQiunan XuMichael WernerGuangming HuangA. CalcaterraA. CalcaterraZ. WuM. L. ChenY. F. LiangD. P. JinXian ChenDayong WangP. L. LiuT. MaYanping HuangJ. Z. BaiS. L. ZangY. P. ChuX. B. JiJie YuT. J. MinK. J. ZhuB. D. SchaeferG. LiC. D. FuC. Q. FengZ. Y. DengXingguo LiXiao-tong LuH. L. MaD. M. LiH. MuramatsuM. PelizaeusY. J. MaoP. FriedelY. ZhangQ. AnYuehong XieWei WuY. X. YangM. R. ShepherdQ. ZhaoY. Z. SunXiang ZhouGang ZhaoM. Bertani

subject

J/psi(3100)Nuclear and High Energy PhysicsParticle physicsflavor: violation [lepton]Electron–positron annihilationElectronannihilation [electron positron]High Energy Physics - ExperimentNuclear physicsJ/psi(3100) --> muon electronR-parityddc:530FlavorE ConversionPhysicsMuonBESBranching fractionbackgroundNumberR-ParitySupersymmetryDecayBeijing StorNucleiConstraintsHigh Energy Physics::ExperimentSupersymmetrybranching ratioleptonic decay [J/psi(3100)]TauLimit3.1 GeV-cmsLeptonexperimental results

description

We search for the lepton-flavor-violating decay of the $J/\psi$ into an electron and a muon using $(225.3\pm2.8)\times 10^{6}$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider. Four candidate events are found in the signal region, consistent with background expectations. An upper limit on the branching fraction of $\mathcal{B}(J/\psi \to e\mu)< 1.5 \times 10^{-7}$ (90% C.L.) is obtained.

10.1103/physrevd.87.112007https://juser.fz-juelich.de/record/139230