Evidence for e(+)e(-)->gamma chi c1,2 at center-of-mass energies from 4.009 to 4.360 GeV
Evidence for e(+)e(-)->gamma chi c1,2 at center-of-mass energies from 4.009 to 4.360 GeV
复制标题
e( )e(-)->gamma chi c1,2 质心能量从 4.009 GeV 到 4.360 GeV 的证据
DOI：
10.1088/1674-1137/39/4/041001
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发表时间：
2015
影响因子：
3.6
通讯作者：
Boyko
中科院分区：
文献类型：
--
作者：
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.;Bondarenko O.;Boyko
类charmonium态Y（4260）是由BaBar[1]在初始态辐射过程e+e−→γISRπ+ π−J/ψ中首次观测到的，随后由CLEO[2]和Belle[3]实验证实。最近，BaBar和Belle用完整的数据集更新了他们的结果，并进一步证实了Y（4260）的存在[4,5]。由于Y（4260）是在e+e−湮灭中通过ISR产生的，所以它的量子数JP C= 1−−。然而，在传统的charmonium家族[6]中，似乎没有可用于Y（4260）的cc插槽。此外，许多不寻常的特征，如与隐藏魅力最终态的强耦合，表明Y（4260）是一个非常规的cc介子。这种状态的可能解释可以在参考文献中找到。[7-11]，但都需要进一步的实验输入。以往对Y（4260）的大多数研究都利用了强子跃迁。除了在π+ π−J/ψ衰变模式中观察到清晰的信号外，Belle实验未能通过e+e−→γISRηJ/ψ过程[12]找到Y（4260）存在的证据。根据收集的13.2 pb−1的e+e−数据
The charmonium-like state Y (4260) was first observed in the initial state radiation (ISR) process e+e−→ γISRπ+ π− J/ψ by BaBar [1], and later confirmed by the CLEO [2] and Belle [3] experiments. Recently, both BaBar and Belle updated their results with full data sets, and further confirmed the existence of the Y (4260)[4, 5]. Since it is produced through ISR in e+e− annihilation, the Y (4260) has the quantum numbers JP C= 1−−. However, there seems to be no cc slot available for the Y (4260) in the conventional charmonium family [6]. In addition, a number of unusual features, such as a strong coupling to hidden-charm final states, suggest that the Y (4260) is a non-conventional cc meson. Possible interpretations of this state can be found in Refs.[7–11], but all need further experimental input. Most of the previous studies of the Y (4260) have utilized hadronic transitions. Except for the clear signal observed in the π+ π− J/ψ decay mode, the Belle experiment failed to find evidence of the Y (4260) via the e+e−→ γISRηJ/ψ process [12]. Based on 13.2 pb− 1 of e+e− data collected at