6533b86cfe1ef96bd12c89a8
RESEARCH PRODUCT
Observation of the Dalitz decayη′→γe+e−
F. C. MaZ. A. LiuJ. Z. BaiJ. F. QiuZhiyong ZhangY. H. ZhengCong-feng QiaoO. AlbayrakL. FavaMeng WangY. DingY. BanP. WeidenkaffX. LiuM. QiH. P. HuangN. Yu. MuchnoiX. S. KangHeng-yun YeY. H. ZhangBibo KeW. B. YanB. J. LiuS. P. WenSteffen SchumannX. S. QinX. R. ZhouY. J. MaoZ. J. XiaoXiangdong RuanM. N. AchasovCheng LiY. P. GuoJ. Y. LiuGiulietto FeliciS. PacettiW. KühnSerkant Ali CetinD. W. BennettZujian WangLei ZhaoX. B. JiM. TiemensZ. G. WangP. R. LiZ. Y. WangZ. A. ZhuY. B. ZhaoW. ShanT. WeberG. X. SunJ. V. BennettLi YanZ. JiaoFu-hu LiuD. H. ZhangJ. DongY. Q. WangS. NisarC. J. TangYifei ZhangY. HuY. P. LuKai LiuH. Y. ZhangL. L. MaL. G. XiaXin FangD. XiaoH. J. LuJ. G. LuY. H. GuanP. PatteriA. AmorosoXiao-hai LiuE. H. ThorndikeG. F. ChenQ. GaoF. E. MaasT. HuA. DbeyssiX. K. ChuTeng LiS. QianJialun PingK. ZhangI. TapanY. H. YanZ. GaoC. P. ShenFeng LiuL. Q. QinF. FeldbauerX. Y. ZhangJ. W. ZhaoJ. F. SunY. ZhangQ. AnY. NefedovJ. Y. ZhangM. KornicerM. LaraY. J. SunPeilian LiuG. LiA. JulinF. De MoriK. LiX. K. ZhouFang LiuI. DenysenkoY. ZengGuangming HuangC. D. FuP. X. ShenC. Q. FengLingxuan ZhangX. L. JiTalib HussainY. P. LuQun-yao WangY. J. MoZ. Y. DengS. B. LiuJ. MinYong-feng HuangD. Cronin-hennessyY. C. ZhuE. BogerX. C. ChenQian LiuZ. WuH. X. YangI. GarziaA. CalcaterraZ. G. ZhaoB. Y. ZhangY. B. ChenXiaofeng ZhuJ. Z. ZhangY. X. YangL. W. JiangQ. A. MalikC. DongS. SosioM. H. GuXingguo LiX. Y. ZhouB. KopfT. HeldH. S. ChenX. H. MoL. S. WangM. H. YeMagnus WolkeJoachim PetterssonZhiqing ZhangO. B. KolcuC. F. RedmerXiaocong AiR. KliemtZhiqing LiuA. YuncuJ. B. JiaoY. F. LiangH. Y. ShengC. GengQ. P. JiK. L. HeJingzhou FanY. G. XieD. J. AmbroseD. P. JinC. X. YuLi ZhouG. F. XuY. L. HanJ. F. ChangJie YuH. H. ZhangM. Y. DongJ. P. LiuZ. J. SunKrisztian PetersA. HafnerQ. M. MaQ. ZhaoY. Z. SunJ. G. MesschendorpL. L. WangH. CaiC. LengH. LoehnerG. A. ChelkovX. T. HuangS. X. DuLiqing XuS. H. ZhangJimin ZhaoX. Y. ShenH. B. LiuV. SantoroX. R. ChenS. JinM. AblikimA. A. ZafarDayong WangN. QinB. ZhengR. G. PingT. J. MinK. J. ZhuG. RongJ. P. DaiB. KlossX. Y. NiuD. BettoniJ. H. ZouM. AlbrechtG. S. HuangI. B. NikolaevR. Q. LuY. YuanY. S. ZhuShan WangXiao-rui LyuJ. L. ZhangG. R. LiaoJ. F. HuP. L. WangGang ZhaoY. GuoA. Q. GuoJ. H. YinK. H. RashidI. UmanM. ShaoY. T. GuX. CaiM. MaggioraLing ZhaoH. LiangS. S. SunXuejun WangM. BertaniW. D. LiJianping ZhengS. ZhuQ. P. JiJ. Q. ZhangW. M. SongZ. Y. HeZ. HaddadiL. YangXiaokang ZhouHao-ran YuX. Y. SongQingnian XuZ. L. HouG. S. VarnerM. LvYang YangX. Q. HaoH. B. LiA. G. DenigZ. H. QinY. N. PuE. FioravantiD. Y. WangC. L. LuoR. E. MitchellW. G. LiS. J. ChenZ. NingJ. J. ZhangM. DestefanisM. UllrichX. M. LiO. BondarenkoS. SpataroX. P. XuX. L. KangA. SarantsevD. H. WeiH. L. MaJ. S. LangeQ. W. ZhaoL. ZottiC. HuK. GoetzenLei LiH. M. LiuS. HanM. H. YeD. M. LiH. MuramatsuX. TangC. Z. YuanW. C. YanJie ZhaoD. X. LinW. GradlM. RipkaC. C. ZhangAlexey ZhemchugovH. M. HuZhao-long WangG. F. CaoZhiqiang LiuB. ZhongL. B. GuoM. PelizaeusL. D. LiuL. H. WuL. Y. DongM. SavrieB. WangY.n. GaoK. J. ZhuUlrich WiednerW. J. ZhengX. Y. GaoF. NerlingL. P. ZhouAndrzej KupscT. MaS. MaD. TothM. L. ChenH. H. LiuJ. W. ZhangZ. P. MaoJ. C. LiH. P. ChengJ. FangL. L. JiangJ. S. HuangJ. ZhuangM. X. LuoD. V. DedovichC. X. LiuF. A. HarrisA. ZalloYaquan FangYang QinTao LuoY. X. XiaK. SchoenningB. S. ZouW. L. YuanB. X. YuX. N. MaY. T. LiangH. S. ChenZ. B. LiY. K. HengShujun ZhaoM. FritschH. L. DaiIgor BoykoM. KavatsyukG. CibinettoR. Baldini FerroliP. LarinB. X. ZhangChangjin ZhangJ. M. BianQ. J. XuQ. OuyangHuan RenYao WangZhenyu ZhangW. LaiX. N. LiHaiping PengJ. H. LiuKe WangS. S. FangR. PolingP. F. DuanFenfen AnB. L. WangT. C. ZhaoY. B. LiuJ. C. ChenXuanhong LouNasser Kalantar-nayestanakiC. Morales MoralesJin LiP. L. WangM. G. ZhaoX. L. LuoW. P. WangF. BianchiS. MarcelloY. F. WangK. MoriyaX. Y. MaW. X. GongC. H. LiS. L. NiuX. Q. LiM. GrecoK. Y. LiuJ. B. WeiTord JohanssonOrhan CakirQ. L. XiuS. L. OlsenRoy A. BriereX. S. JiangZ. T. SunF. Lisubject
PhysicsNuclear and High Energy PhysicsParticle physicsMeson010308 nuclear & particles physicsBranching fractionAstrophysics::High Energy Astrophysical PhenomenaForm factor (quantum field theory)Vector meson dominance01 natural sciencesGamma gammaNuclear physics0103 physical sciencesHigh Energy Physics::ExperimentInvariant massVector mesonNuclear Experiment010306 general physicsdescription
We report the first observation of the Dalitz decay eta' -> gamma e(+)e(-), based on a data sample of 1.31 billion J/psi events collected with the BESIII detector. The eta' mesons are produced via the J/psi -> gamma eta' decay process. The ratio (eta' -> gamma e(+)e(-))/Gamma (eta' -> gamma gamma) is measured to be (2.13 +/- 0.09(stat) +/- 0.07(sys)) x 10(-2). This corresponds to a branching fraction B(eta' -> gamma e(+)e(-)) = (4.69 +/- 0.20(stat) +/- 0.23(sys)) x 10(-4). The transition form factor is extracted and different expressions are compared to the measured dependence on the e(+)e(-) invariant mass. The results are consistent with the prediction of the vector meson dominance model.
year | journal | country | edition | language |
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2015-07-01 | Physical Review D |