6533b7d7fe1ef96bd1267989

RESEARCH PRODUCT

Observation ofZc(3900)0ine+e−→π0π0J/ψ

Yang QinS. HanY. X. XiaX. K. ChuX. L. JiG. A. ChelkovG. A. ChelkovG. A. ChelkovS. L. NiuX. K. ZhouFang LiuI. DenysenkoF. LiP. L. WangX. Q. LiM. GrecoJ. B. JiaoZ. T. SunZ. A. LiuV. PrasadPeilian LiuLingxuan ZhangY. BanP. WeidenkaffF. C. MaS. P. WenL. H. WuX. S. QinX. R. ZhouCheng LiM. SavrieB. Y. ZhangX. L. LuoH. X. YangH. B. LiA. G. DenigC. L. LuoM. H. GuI. GarziaX. Y. GaoA. YuncuH. Y. ShengJin LiYaquan FangY. G. XieC. X. YuM. MaggioraLing ZhaoM. BertaniY. DingK. Y. LiuB. ZhengLi ZhouZ. B. LiK. GoetzenR. G. PingC. C. ZhangY. GaoB. ZhongL. B. GuoG. LiX. Y. JiangY. N. PuS. X. DuOrhan CakirSai-juan ChenLei ZhaoZ. HaddadiC. LengJ. F. QiuW. P. WangP. KieseL. YangS. L. OlsenM. Y. DongP. R. LiF. BianchiH. MuramatsuHuihui LiuUlrich WiednerRoy A. BriereH. B. LiuY. H. GuanC. D. FuM. KornicerKai LiuZ. H. WangZ. Y. HeZ. L. HouX. S. JiangYang YangC. Q. FengJie ZhaoJ. P. LiuX. R. ChenL. FavaO. B. KolcuO. B. KolcuY. J. MaoTao LuoJ. H. ZouT. MaJ. G. MesschendorpW. KühnZ. Y. DengC. F. RedmerD. X. LinF. De MoriS. S. SunH. M. HuD. Y. WangShan WangXiao-rui LyuF. NerlingJ. P. DaiK. SchoenningB. S. ZouY. L. HanS. SchumannZ. A. ZhuM. G. ZhaoY. NefedovA. CalcaterraZ. G. ZhaoI. UmanX. T. HuangM. AblikimG. RongJ. Y. LiuXingguo LiQiunan XuH. P. HuangW. C. YanYao WangY. N. ZhangM. H. YeR. E. MitchellG. X. SunJ. V. BennettLi YanX. Y. ZhouJ. W. ZhangA. A. ZafarZ. J. SunH. LoehnerY. F. WangG. S. VarnerC. Z. YuanJ. Q. ZhangZhiqiang LiuJ. Z. BaiW. G. LiYu ZhangX. M. LiW. GradlM. RipkaL. P. ZhouK. H. RashidG. F. XuYunlong ZhangC. P. ShenJ. M. BianZhenyu ZhangS. J. ZhaoBibo KeS. SpataroZ. JiaoFu-hu LiuCui LiD. H. ZhangT. HussainJ. C. LiW. B. YanX. Y. MaS. JinW. X. GongJ. ZhuangB. X. YuY. B. ZhaoX. P. XuM. UllrichZ. P. MaoH. W. YuE. E. ErenM. N. AchasovQ. GaoM. X. LuoJian WeiGiulietto FeliciYucheng HuangD. V. DedovichC. H. LiW. ShanX. B. JiM. TiemensJ. DongH. P. ChengJ. FangTao LiS. PacettiX. LiuH. J. LuJ. G. LuY. ZhangQ. AnZ. J. XiaoP. PatteriY. Q. WangXiao-hai LiuZ. GaoLei LiH. M. LiuY. J. MoS. NisarQ. OuyangL. D. LiuL. Y. DongF. E. MaasT. HuD. BettoniJ. L. ZhangR. PolingX. N. MaY. T. LiangA. ZalloP. LarinKe LiP. L. WangH. S. ChenY. GuoX. Y. SongX. F. WangR. KliemtC. J. TangCh. RosnerY. HuGuangshun HuangJ. C. ChenJ. MinY. P. LuS. S. FangJ. Z. FanA. ZhemchugovA. ZhemchugovQ. M. MaB. KlossH. S. ChenSerkant Ali CetinHuan RenM. FritschJianping ZhengJie YuT. WeberG. F. CaoB. WangX. Y. NiuY. B. LiuH. L. DaiIgor BoykoY. YuanY. S. ZhuH. LiangD. XiaoC. Morales MoralesY. X. YangM. KavatsyukQ. P. JiS. ZhuQ. P. JiA. Q. GuoXiangdong RuanH. H. ZhangT. J. MinK. J. ZhuG. CibinettoS. QianJialun PingQ. LiuY. P. GuoGuangming HuangP. X. ShenW. J. ZhengK. ZhangZ. G. WangF. A. HarrisZ. P. ZhangH. Y. ZhangB. KopfLiqing XuS. H. ZhangX. Y. ShenZ. WuV. SantoroW. M. SongX. Y. ZhangL. L. MaL. W. JiangJ. S. HuangD. W. BennettZujian WangL. G. XiaA. AmorosoM. LaraJ. B. LiuR. Baldini FerroliK. L. HeM. LvC. X. LiuZhiqing ZhangY. J. SunE. BogerE. BogerA. DbeyssiAndrzej KupscQ. J. XuW. L. YuanY. P. LuM. Z. WangG. F. ChenB. X. ZhangA. JulinX. N. LiQ. L. XiuA. HafnerQ. ZhaoJimin ZhaoHaiping PengX. C. LouM. L. ChenJ. H. LiuZ. H. QinKe WangJ. Y. ZhangY. Z. SunP. F. DuanFenfen AnB. L. WangT. C. ZhaoXiang ZhouR. Q. LuJ. J. ZhangM. QiH. J. YangM. DestefanisX. H. MoL. S. WangN. Kalantar-nayestanakiM. H. YeX. FangL. L. WangH. CaiGang ZhaoFeng LiuY. K. HengMagnus WolkeI. B. NikolaevY. F. LiangS. B. LiuC. DongD. P. JinJ. H. YinS. SosioM. ShaoY. T. GuDayong WangN. QinH. L. MaJoachim PetterssonD. M. LiE. FioravantiL. ZottiM. PelizaeusC. HuX. L. KangX. TangA. SarantsevA. SarantsevD. H. WeiJ. S. LangeQ. W. ZhaoD. J. AmbroseXiaocong AiM. AlbrechtW. D. LiI. TapanY. H. YanK. J. ZhuJ. W. ZhaoY. C. ZhuK. MoriyaT. HeldZ. NingChi ZhangBrent J. LiuE. H. ThorndikeL. Q. QinZhiqing LiuF. FeldbauerX. C. ChenT. JohanssonJ. F. ChangKrisztian PetersC. GengX. CaiY. H. ZhengCong-feng QiaoO. AlbayrakN. Yu. MuchnoiX. S. KangHeng-yun YeY. H. ZhangZ. Y. WangX. Q. HaoG. R. LiaoJ. F. HuL. L. JiangJ. F. SunS. MarcelloY. ZengY. B. ChenXiaofeng ZhuJ. Z. Zhang

subject

Physics010308 nuclear & particles physicsElectron–positron annihilationAnalytical chemistryGeneral Physics and AstronomyState (functional analysis)01 natural sciencesAtomic mass0103 physical sciencesPiTetraquarkAtomic physics010306 general physicsNeutral stateZc(3900)

description

Using a data sample collected with the BESIII detector operating at the BEPCII storage ring, we observe a new neutral state Z(c)(3900)(0) with a significance of 10.4 sigma. The mass and width are measured to be 3894.8 +/- 2.3 +/- 3.2 MeV/c(2) and 29.6 +/- 8.2 +/- 8.2 MeV, respectively, where the first error is statistical and the second systematic. The Born cross section for e(+)e(-) -> pi(0)pi(0) J/Psi and the fraction of it attributable to pi(0)Z(c)(3900)(0) -> pi(0)pi(0) J/Psi in the range E-c.m. = 4.19-4.42 GeV are also determined. We interpret this state as the neutral partner of the four-quark candidate Z(c)(3900)(+/-).

https://doi.org/10.1103/physrevlett.115.112003