6533b823fe1ef96bd127e9a9

RESEARCH PRODUCT

Search forηandη′→π+e−ν¯e+c.c.decays inJ/ψ→ϕηandϕη′

G. R. LiaoY. H. ZhengCong-feng QiaoO. AlbayrakJ. B. JiaoF. F. JingMeng WangN. Yu. MuchnoiI. B. NikolaevHeng-yun YeK. H. RashidY. H. ZhangY. DingShou-hua ZhuA. ZalloM. ShaoY. T. GuQ. OuyangQ. G. WenB. J. LiuQingnian XuYang QinM. Y. DongH. H. ZhangZ. Y. WangY. X. XiaXuejun WangQ. J. LiM. G. ZhaoS. S. FangA. SarantsevD. H. WeiJ. S. LangeH. B. LiuJ. H. ZouB. S. ZouX. L. JiS. P. YuG. A. ChelkovG. A. ChelkovTalib HussainG. R. LuZ. A. ZhuZ. NingY. B. LiuG. F. XuS. JinH. J. LuJ. G. LuX. Y. SongY. H. GuanS. S. SunZ. G. ZhaoXiangdong RuanLei ZhaoTao LuoM. H. YeC. S. JiH. LiangD. H. SunM. MaggioraLing ZhaoX. K. ZhouJürgen BeckerF. E. MaasH. X. YangY. G. XieQ. P. JiT. HuD. X. LinH. M. HuL. HuangJ. V. BennettR. E. MitchellL. Y. DongZ. Y. HeZ. L. HouYang YangD. Y. WangK. Moriya MoralesS. X. DuMichael WernerL. G. XiaZ. G. WangH. Y. ZhangE. H. ThorndikeM. QiJ. W. ZhangY. F. WangZ. J. SunH. LoehnerHuihui LiuGuangming HuangQ. L. XiuB. X. YuJ. P. LiuP. L. WangQi-wen LüJ. G. MesschendorpP. L. WangS. QianJialun PingA. CalcaterraA. CalcaterraA. CalcaterraG. F. ChenC. HuL. Q. QinX. TangN. G. GulerN. G. GulerZ. WuH. B. LiA. G. DenigZujian WangJ. Y. ZhangW. M. DingD. J. AmbroseC. L. LuoW. B. YanX. Y. ZhangX. L. LuoM. N. AchasovX. Y. MaH. MoeiniW. X. GongG. M. XuR. ZhangG. S. HuangShan WangZhiqiang LiuMiao HeM. KornicerJ. P. DaiY. F. LiangD. P. JinC. Z. YuanC. C. ZhangS. PacettiB. ZhongL. B. GuoY. J. SunE. BogerE. BogerA. Q. GuoZ. A. LiuJifeng HuQ. P. JiL. P. ZhouG. S. VarnerB. SpruckX. H. ZhaoY. K. HengC. L. MaL. L. JiangW. M. SongHang LiuJ. M. BianZhenyu ZhangW. LaiZ. P. MaoLei LiUlrich WiednerF. LiFeng LiuK. LiC. H. LiFang LiuXian ChenDayong WangY. NefedovY. B. ZhaoHao-ran YuH. S. ChenS. H. ZhangX. Y. ShenShujun ZhaoH. P. ChengF. C. MaJ. FangX. H. MoL. S. WangP. L. LiuY. M. ZhuE. PrencipeY. BanP. WeidenkaffZhiyong ZhangC. GengI. DenysenkoM. H. YeI. U. UmanI. U. UmanF. A. HarrisX. Q. LiM. LeyheZ. H. QinX. LiuY. Q. WangJ. C. ChenH. L. DaiIgor BoykoQ. M. MaX. L. WangC. J. TangNasser Kalantar-nayestanakiW. D. LiChuan LiuS. P. WenZ. J. XiaoJ. Q. ZhangW. G. LiX. S. QinX. R. ZhouJ. L. FuB. Y. ZhangCheng LiY. P. LuT. MaYanping HuangM. GrecoZhiqing LiuJ. F. QiuL. L. WangH. CaiY. P. GuoL. FavaKai LiuB. Z. ZenginK. J. ZhuXuantong ZhangT. GuoSerkant Ali CetinM. L. ChenFeng XueCui LiS. SpataroX. P. XuJ. F. ChangC. ZhuChangjin ZhangQian LiuK. Y. LiuK. X. ZhaoJ. B. WeiY. YuanY. S. ZhuJ. C. LiKe WangK. LiuS. B. LiuY. D. WangH. M. LiuI. TapanS. L. LiY. H. YanX. CaiX. R. LiS. L. OlsenJoong-won ParkJ. ZhuangG. F. CaoJ. W. ZhaoM. X. LuoY. L. HanV. V. BytevJ. MinYong-feng HuangD. Cronin-hennessyRoy A. BriereY. C. ZhuX. S. JiangFenfen AnC. NicholsonD. V. DedovichT. C. ZhaoQun-yao WangH. B. LiuG. X. SunLi YanO. CakirZhenghao ZhangZ. JiaoFu-hu LiuD. H. ZhangM. UllrichLili ZhangX. T. LiaoT. HeldB. KopfHongsheng ZhaoK. L. HeR. Baldini FerroliM. H. GuR. PolingZhenli XuH. Y. ShengQ. J. XuJianping ZhengC. X. YuX. N. LiB. ZhengR. G. PingM. LvHaiping PengZ. XueM. DestefanisN. WuKrisztian PetersQ. A. MalikM. BertaniW. GradlB. Q. WangC. P. ShenC. P. ShenJ. F. SunY. ZengZhe SunY. B. ChenXiaofeng ZhuJ. Z. ZhangK. GoetzenW. KuehnS. MaD. TothSanfeng WuJ. S. HuangC. X. LiuXiao-tong LuH. L. MaD. M. LiH. MuramatsuM. PelizaeusY. J. MaoP. FriedelY. ZhangQ. AnWei WuA. ZhemchugovA. ZhemchugovY. X. YangM. R. ShepherdQ. ZhaoY. Z. SunXiang ZhouGang ZhaoS. J. ChenO. BondarenkoX. T. HuangM. AblikimA. A. ZafarG. RongL. H. WuY.n. GaoY. T. LiangC. MoralesZ. B. LiM. KavatsyukB. X. ZhangJie YuT. J. MinK. J. ZhuB. D. SchaeferG. LiH. S. SazakC. D. FuC. Q. FengZ. Y. DengXingguo LiJ. Z. BaiS. L. ZangY. P. ChuX. B. Ji

subject

Semileptonic decayPhysicsNuclear and High Energy PhysicsMesonElectron–positron annihilationPiAnalytical chemistryHigh Energy Physics::ExperimentNuclear ExperimentBar (unit)

description

Using a sample of 225.3 million J/psi events collected with the BESIII detector at the BEPCII e(+)e(-) collider in 2009, searches for the decays of eta and eta' -> pi(+)e(-)(v) over bar (e) + c.c. in J/psi -> phi eta and phi eta' are performed. The phi signals, which are reconstructed in K+K- final states, are used to tag eta and eta' semileptonic decays. No signals are observed for either eta or eta', and upper limits at the 90% confidence level are determined to be 7.3 x 10(-4) and 5.0 x 10(-4) for the ratios B(eta ->pi(+)e(-)(v) over bar (e) + c.c)/B(eta ->pi(+)pi(-)pi(0)) and B(eta'->pi(+)e(-)(v) over bar (e) + c.c)/B(eta'->pi(+)pi(-)eta) respectively. These are the first upper- limit values determined for eta and eta' semileptonic weak decays. DOI: 10.1103/PhysRevD.87.032006

https://doi.org/10.1103/physrevd.87.032006