6533b862fe1ef96bd12c7576

RESEARCH PRODUCT

Observation of a Charged Charmoniumlike Structure ine+e−→(D*D¯*)±π∓ats=4.26  GeV

J. F. QiuM. YeJ. MinH. B. LiuI. UmanQ. A. MalikZhiqiang LiuMiao HeS. BraunJifeng HuS. X. WuH. P. ChengJ. FangG. R. LiaoF. F. JingQ. OuyangN. WuKe WangB. KopfW. B. YanZ. P. MaoH. LiangM. UllrichX. L. WangS. S. FangO. FuksO. FuksShou-hua ZhuA. ZalloYang QinK. L. HeM. Z. WangF. F. AnKejun ZhuX. LiuS. JinG. LiY. B. LiuC. S. JiI. B. NikolaevI. B. NikolaevDing-xiong WangQ. P. JiJianhao ZhangJ. C. LiY. X. XiaKai LiuZ. J. XiaoY. P. GuoJ. ZhuangChi ZhangM. QiM. X. LuoShan WangC. D. FuZ. G. WangH. Y. ZhangHaiwen LiuG. F. ChenJ. Y. ZhangP. R. LiY. NefedovV. V. BytevZ. NingM. ShaoY. F. LiangD. P. JinT. GuoSerkant Ali CetinQ. P. JiZ. L. HouJian WeiYucheng HuangXiao-tong LuZ. WuZ. Y. DengD. V. DedovichY. D. WangS. H. ZhangX. Y. ShenB. SpruckDayong WangWei LiP. L. LiuE. H. ThorndikeX. K. ZhouK. PetersH. P. PengH. L. MaXingguo LiD. J. AmbroseD. M. LiL. Q. QinT. C. ZhaoRui ZhangH. MuramatsuG. S. VarnerJ. F. SunQun-yao WangHang LiuZhenghao ZhangM. PelizaeusX. R. ChenLili ZhangG. X. SunLi YanE. PrencipeY. X. YangM. BertaniZhiqing LiuO. BondarenkoZ. JiaoFu-hu LiuC. Q. FengY. ZengH. H. ZhangW. D. LiS. QianJialun PingJ. F. ChangTao LuoM. R. ShepherdX. Y. ZhangJ. V. BennettCui LiM. LaraC. GengQ. L. XiuY. Z. SunX. CaiX. R. LiM. L. ChenB. X. YuY. B. ChenP. L. WangE. BogerE. BogerXiaofeng ZhuJ. Z. ZhangM. MaggioraM. MaggioraLing ZhaoXiang ZhouJ. M. BianZhenyu ZhangY. P. LuW. LaiZ. Y. HeX. L. LuoY. H. ZhengW. GradlYang YangCong-feng QiaoO. AlbayrakY. BanP. WeidenkaffH. Y. ShengGang ZhaoB. Y. ZhangN. Yu. MuchnoiN. Yu. MuchnoiHeng-yun YeY. J. MaoC. Z. YuanY. H. ZhangQ. G. WenJ. C. ChenZ. Y. WangX. S. QinJ. L. FuNasser Kalantar-nayestanakiP. FriedelZ. T. SunF. Y. LiC. Morales MoralesH. S. ChenY. N. GaoShujun ZhaoB. S. ZouWei WuZ. G. ZhaoA. ZhemchugovA. ZhemchugovH. L. DaiIgor BoykoS. P. WenP. LarinM. H. GuS. P. YuG. A. ChelkovG. A. ChelkovJ. Q. ZhangA. CalcaterraH. J. LuJ. G. LuL. FavaL. FavaC. X. YuF. E. MaasT. HuMichael WernerL. HuangY. G. XieGuangming HuangB. ZhengR. G. PingM. G. ZhaoLi ZhouZhiqing ZhangS. X. DuYuekun HengStefano SpataroStefano SpataroZ. J. SunH. LoehnerB.y. WangHongsheng ZhaoFeng LiuQ. AnR. PolingXuejun WangH. B. LiA. G. DenigC. L. LuoJianping ZhengC. C. ZhangB. ZhongL. B. GuoLei LiUlrich WiednerM. KornicerT. MaX. H. MoM. LvS. L. OlsenRoy A. BriereX. S. JiangW. M. SongL. L. WangH. CaiJie YuM. DestefanisM. DestefanisY. C. ZhuQ. M. MaO. CakirB. KlossT. J. MinL. S. WangY. T. LiangY. DingB. J. LiuX. Q. LiM. GrecoM. GrecoZ. B. LiY. YuanY. S. ZhuY. T. GuC. F. RedmerJ.b. JiaoD. X. LinQ. J. LiM. KavatsyukG. R. LuX. T. HuangA. SarantsevD. H. WeiJ. S. LangeH. M. HuK. Y. LiuY. B. ZhaoM. H. YeYun-zhi ZhangM. AblikimX. T. LiaoL. D. LiuL. Y. DongY. F. WangZ. A. ZhuR. Baldini FerroliJ. Z. BaiQ. J. XuT. HussainX. Y. MaH. MoeiniW. X. GongW. M. DingS. L. ZangX. N. LiY. Q. WangHai YuYulei HanY. P. ChuQiang ZhaoB. X. ZhangX. B. JiC. J. TangC. H. LiZ. A. LiuD. H. SunC. P. ShenX. R. ZhouY. J. SunJ. W. ParkZujian WangX. H. ZhaoCheng LiC. HuX. TangK. J. ZhuXuantong ZhangK. MoriyaXiangdong RuanQ. LiuLei ZhaoM. Y. DongP. L. WangX. C. LouX. C. LouH. B. LiuL. G. XiaJ. H. ZouS. S. SunF. A. HarrisS. MaJürgen BeckerD. TothR. E. MitchellL. L. JiangD. H. ZhangK. LiFang LiuI. DenysenkoJ. S. HuangC. X. LiuK. GoetzenJ P DaiW. KuehnI. TapanY. H. YanJ. W. ZhaoY.h. GuanD. Cronin-hennessyA. A. ZafarS. B. LiuK. H. RashidT. HeldA. Q. GuoG. RongM. LeyheZ. H. QinZhihao XuChuan LiuX. P. XuC. ZhuG. F. CaoS. J. ChenX. L. JiH. X. YangHuihui LiuJ. P. LiuJ. G. MesschendorpG. S. HuangQiunan XuM. N. AchasovM. N. AchasovS. PacettiS. PacettiL. H. WuZ. XueG. F. XuX. Y. SongF. C. Ma

subject

PhysicsHigh energyPositronRecoilElectron–positron annihilationMass spectrumAnalytical chemistryPiGeneral Physics and AstronomyHigh Energy Physics::ExperimentBar (unit)

description

We study the process e(+)e(-) -> (D* (D) over bar*)(+/-)pi(-/+) at a center-of-mass energy of 4.26 GeV using a 827 pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137 +/- 9 +/- 15) pb. We observe a structure near the (D* (D) over bar*)(+/-) threshold in the pi(-/+) recoil mass spectrum, which we denote as the Z(c)(+/-) (4025). The measured mass and width of the structure are (4026.3 +/- 2.6 +/- 3.7) MeV/c(2) and (24.8 +/- 5.6 +/- 7.7) MeV, respectively. Its production ratio sigma(e(+)e(-) -> Z(c)(+/-)(4025)pi(-/+)-> (D* (D) over bar*)(+/-)pi(-/+)/sigma(e(+)e(-) -> (D* (D) over bar*)(+/-)pi(-/+) is determined to be 0.65 +/- 0.09 +/- 0.06. The first uncertainties are statistical and the second are systematic.

https://doi.org/10.1103/physrevlett.112.132001