在\(e^{+}e^{-}\to(D^{*}D^{*\overline{}})^{0}\pi^{0}\)过程中对类中性粲偶素态\(Z_{c}(4025)^{0}\)的观测
Observation of a Neutral Charmoniumlike State Z_{c}(4025)^{0} in e^{+}e^{-}→(D^{*}D[over ¯]^{*})^{0}π^{0}.
作者信息
Ablikim M, Achasov M N, Ai X C, Albayrak O, Albrecht M, Ambrose D J, Amoroso A, An F F, An Q, Bai J Z, Ferroli R Baldini, Ban Y, Bennett D W, Bennett J V, Bertani M, Bettoni D, Bian J M, Bianchi F, Boger E, Boyko I, Briere R A, Cai H, Cai X, Cakir O, Calcaterra A, Cao G F, Cetin S A, Chang J F, Chelkov G, Chen G, Chen H S, Chen H Y, Chen J C, Chen M L, Chen S J, Chen X, Chen X R, Chen Y B, Cheng H P, Chu X K, Cibinetto G, Dai H L, Dai J P, Dbeyssi A, Dedovich D, Deng Z Y, Denig A, Denysenko I, Destefanis M, De Mori F, Ding Y, Dong C, Dong J, Dong L Y, Dong M Y, Du S X, Duan P F, Eren E E, Fan J Z, Fang J, Fang S S, Fang X, Fang Y, Fava L, Feldbauer F, Felici G, Feng C Q, Fioravanti E, Fritsch M, Fu C D, Gao Q, Gao X Y, Gao Y, Gao Z, Garzia I, Geng C, Goetzen K, Gong W X, Gradl W, Greco M, Gu M H, Gu Y T, Guan Y H, Guo A Q, Guo L B, Guo Y, Guo Y P, Haddadi Z, Hafner A, Han S, Han Y L, Hao X Q, Harris F A, He K L, He Z Y, Held T, Heng Y K, Hou Z L, Hu C, Hu H M, Hu J F, Hu T, Hu Y, Huang G M, Huang G S, Huang H P, Huang J S, Huang X T, Huang Y, Hussain T, Ji Q, Ji Q P, Ji X B, Ji X L, Jiang L L, Jiang L W, Jiang X S, Jiang X Y, Jiao J B, Jiao Z, Jin D P, Jin S, Johansson T, Julin A, Kalantar-Nayestanaki N, Kang X L, Kang X S, Kavatsyuk M, Ke B C, Kiese P, Kliemt R, Kloss B, Kolcu O B, Kopf B, Kornicer M, Kühn W, Kupsc A, Lange J S, Lara M, Larin P, Leng C, Li C, Li C H, Li Cheng, Li D M, Li F, Li G, Li H B, Li J C, Li Jin, Li K, Li K, Li Lei, Li P R, Li T, Li W D, Li W G, Li X L, Li X M, Li X N, Li X Q, Li Z B, Liang H, Liang Y F, Liang Y T, Liao G R, Lin D X, Liu B J, Liu C X, Liu F H, Liu Fang, Liu Feng, Liu H B, Liu H H, Liu H H, Liu H M, Liu J, Liu J B, Liu J P, Liu J Y, Liu K, Liu K Y, Liu L D, Liu P L, Liu Q, Liu S B, Liu X, Liu X X, Liu Y B, Liu Z A, Liu Zhiqiang, Liu Zhiqing, Loehner H, Lou X C, Lu H J, Lu J G, Lu R Q, Lu Y, Lu Y P, Luo C L, Luo M X, Luo T, Luo X L, Lv M, Lyu X R, Ma F C, Ma H L, Ma L L, Ma Q M, Ma T, Ma X N, Ma X Y, Maas F E, Maggiora M, Mao Y J, Mao Z P, Marcello S, Messchendorp J G, Min J, Min T J, Mitchell R E, Mo X H, Mo Y J, Morales C Morales, Moriya K, Muchnoi N Yu, Muramatsu H, Nefedov Y, Nerling F, Nikolaev I B, Ning Z, Nisar S, Niu S L, Niu X Y, Olsen S L, Ouyang Q, Pacetti S, Patteri P, Pelizaeus M, Peng H P, Peters K, Pettersson J, Ping J L, Ping R G, Poling R, Prasad V, Pu Y N, Qi M, Qian S, Qiao C F, Qin L Q, Qin N, Qin X S, Qin Y, Qin Z H, Qiu J F, Rashid K H, Redmer C F, Ren H L, Ripka M, Rong G, Rosner Ch, Ruan X D, Santoro V, Sarantsev A, Savrié M, Schoenning K, Schumann S, Shan W, Shao M, Shen C P, Shen P X, Shen X Y, Sheng H Y, Song W M, Song X Y, Sosio S, Spataro S, Sun G X, Sun J F, Sun S S, Sun Y J, Sun Y Z, Sun Z J, Sun Z T, Tang C J, Tang X, Tapan I, Thorndike E H, Tiemens M, Ullrich M, Uman I, Varner G S, Wang B, Wang B L, Wang D, Wang D Y, Wang K, Wang L L, Wang L S, Wang M, Wang P, Wang P L, Wang S G, Wang W, Wang X F, Wang Y D, Wang Y F, Wang Y Q, Wang Z, Wang Z G, Wang Z H, Wang Z Y, Weber T, Wei D H, Wei J B, Weidenkaff P, Wen S P, Wiedner U, Wolke M, Wu L H, Wu Z, Xia L G, Xia Y, Xiao D, Xiao Z J, Xie Y G, Xiu Q L, Xu G F, Xu L, Xu Q J, Xu Q N, Xu X P, Yan L, Yan W B, Yan W C, Yan Y H, Yang H J, Yang H X, Yang L, Yang Y, Yang Y X, Ye H, Ye M, Ye M H, Yin J H, Yu B X, Yu C X, Yu H W, Yu J S, Yuan C Z, Yuan W L, Yuan Y, Yuncu A, Zafar A A, Zallo A, Zeng Y, Zhang B X, Zhang B Y, Zhang C, Zhang C C, Zhang D H, Zhang H H, Zhang H Y, Zhang J J, Zhang J L, Zhang J Q, Zhang J W, Zhang J Y, Zhang J Z, Zhang K, Zhang L, Zhang S H, Zhang X Y, Zhang Y, Zhang Y N, Zhang Y H, Zhang Y T, Zhang Yu, Zhang Z H, Zhang Z P, Zhang Z Y, Zhao G, Zhao J W, Zhao J Y, Zhao J Z, Zhao Lei, Zhao Ling, Zhao M G, Zhao Q, Zhao Q W, Zhao S J, Zhao T C, Zhao Y B, Zhao Z G, Zhemchugov A, Zheng B, Zheng J P, Zheng W J, Zheng Y H, Zhong B, Zhou L, Zhou Li, Zhou X, Zhou X K, Zhou X R, Zhou X Y, Zhu K, Zhu K J, Zhu S, Zhu X L, Zhu Y C, Zhu Y S, Zhu Z A, Zhuang J, Zotti L, Zou B S, Zou J H
机构信息
Institute of High Energy Physics, Beijing 100049, People's Republic of China.
G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
出版信息
Phys Rev Lett. 2015 Oct 30;115(18):182002. doi: 10.1103/PhysRevLett.115.182002. Epub 2015 Oct 29.
We report a study of the process e^{+}e^{-}→(D^{}D[over ¯]^{})^{0}π^{0} using e^{+}e^{-} collision data samples with integrated luminosities of 1092 pb^{-1} at sqrt[s]=4.23 GeV and 826 pb^{-1} at sqrt[s]=4.26 GeV collected with the BESIII detector at the BEPCII storage ring. We observe a new neutral structure near the (D^{}D[over ¯]^{})^{0} mass threshold in the π^{0} recoil mass spectrum, which we denote as Z_{c}(4025)^{0}. Assuming a Breit-Wigner line shape, its pole mass and pole width are determined to be (4025.5_{-4.7}^{+2.0}±3.1) MeV/c^{2} and (23.0±6.0±1.0) MeV, respectively. The Born cross sections of e^{+}e^{-}→Z_{c}(4025)^{0}π^{0}→(D^{}D[over ¯]^{})^{0}π^{0} are measured to be (61.6±8.2±9.0) pb at sqrt[s]=4.23 GeV and (43.4±8.0±5.4) pb at sqrt[s]=4.26 GeV. The first uncertainties are statistical and the second are systematic.
我们报告了一项使用在北京正负电子对撞机（BEPCII）储存环上的北京谱仪III（BESIII）探测器收集的质心能量(\sqrt{s}=4.23) GeV时积分亮度为(1092) pb(^{-1})以及质心能量(\sqrt{s}=4.26) GeV时积分亮度为(826) pb(^{-1})的正负电子碰撞数据样本，对过程(e^{+}e^{-}\to(D^{}D[\overline{}])^{0}\pi^{0})进行的研究。我们在(\pi^{0})反冲质量谱中((D^{}D[\overline{}])^{0})质量阈值附近观测到一个新的中性结构，我们将其记为(Z_{c}(4025)^{0})。假设布赖特 - 维格纳线形，其极点质量和极点宽度分别确定为((4025.5_{-4.7}^{+2.0}\pm3.1)) MeV/(c^{2})和((23.0\pm6.0\pm1.0)) MeV。测量得到(e^{+}e^{-}\to Z_{c}(4025)^{0}\pi^{0}\to(D^{}D[\overline{}])^{0}\pi^{0})在(\sqrt{s}=4.23) GeV时的玻恩截面为((61.6\pm8.2\pm9.0)) pb，在(\sqrt{s}=4.26) GeV时为((43.4\pm8.0\pm5.4)) pb。第一个不确定度是统计性的，第二个是系统性的。
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