论文标题

观察$ e^{+} e^{ - } \ to k^{+} k^{ - }π^{0}π^{0} $中的共振结构的观察

Observation of a resonant structure in $e^{+}e^{-} \to K^{+}K^{-}π^{0}π^{0}$

论文作者

Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Amoroso, A., An, Q., Anita, Bai, Y., Bakina, O., Ferroli, R. Baldini, Balossino, I., Ban, Y., Begzsuren, K., Bennett, J. V., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Biernat, J., Bloms, J., Boyko, I., Briere, R. A., Cai, H., Cai, X., Calcaterra, A., Cao, G. F., Cao, N., Cetin, S. A., Chang, J. F., Chang, W. L., Chelkov, G., Chen, D. Y., Chen, G., Chen, H. S., Chen, M. L., Chen, S. J., Chen, X. R., Chen, Y. B., Cheng, W., Cibinetto, G., Cossio, F., Cui, X. F., ~Dai, H. ~L., Dai, J. P., Dai, X. C., 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., Fang, J., Fang, S. S., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C. Q., Fritsch, M., Fu, C. D., Fu, Y., Gao, X. L., Gao, Y., Gao, Y., Gao, Y. G., Garzia, I., Gersabeck, E. M., Gilman, A., Goetzen, K., Gong, L., Gong, W. X., Gradl, W., Greco, M., Gu, L. M., Gu, M. H., Gu, S., Gu, Y. T., Guan, C. Y, Guo, A. Q., Guo, L. B., Guo, R. P., Guo, Y. P., Guo, Y. P., Guskov, A., Han, S., Han, T. T., Han, T. Z., Hao, X. Q., Harris, F. A., He, K. L., Heinsius, F. H., Held, T., Heng, Y. 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论文摘要

使用$ e^{+} e^{ - } $ collision数据示例,质量中心能量范围从2.000到2.644 GEV,由BESIII检测器收集在BEPCII碰撞器上,总体整合的亮度为300 pb^{ - 1},部分波},$ e^e^$ e} k^{+} k^{ - }π^{0}π^{0} $。该过程的总横截面$ e^{+} e^{ - } \ to k^{+} k^{ - }π^{0}π^{0} $,以及天生的跨部门f或子程序$ e^{+e^{+} $ k^{+}(1460)k^{ - } $,$ k^{+} _ {1} _ {1}(1400)k^{ - } $,$ k^{+} _ {1}(1270)(1270)k^{ - } - } $ and $ k^{*+} {*+}(*+}(892) 活力。 $ e^{+} e^{ - } \ to k^{+} k^{ - }π^{0}π^{0} $和$ ϕπ^{0}π^{0}π^{0} $的相应结果$ k^{+}(1460)k^{ - } $,$ k^{+} _ {1} _ {1}(1400)k^{ - } $,$ k^{+} _ {1}(1270)(1270)k^{ - } k^{ - } $ and $ k^{*+} k^+} k^k^ - 16.8 $ \ pm $ 12.4)〜MEV/c^{2}和宽度$γ$ =(106.9 $ \ pm $ 32.1 $ \ pm $ \ pm $ 28.1)〜MEV的总体统计显着性为6.3 $σ$,尽管在Subprocess $ e^{+e^{+} e^e^e^e^^e^^^e^^e^e^^e^^e^^e^^e^^e^^e^^^^^^^^ - ^^^ - ^^^^^^^ - - - - - - k^{+} _ {1}(1270)k^{ - } $和$ k^{*+}(892)k^{* - }(892)$。观察到的结构的共振参数表明它可以用$ ϕ(2170)$识别,因此结果为$ ϕ(2170)$的内部性质提供了有价值的输入。

Using $e^{+}e^{-}$ collision data samples with center-of-mass energies ranging from 2.000 to 2.644 GeV, collected by the BESIII detector at the BEPCII collider, and with a total integrated luminosity of 300 pb^{-1}, a partial-wave analysis is performed for the process $e^{+}e^{-} \to K^{+}K^{-}π^{0}π^{0}$. The total Born cross sections for the process $e^{+}e^{-} \to K^{+}K^{-}π^{0}π^{0}$, as well as the Born cross sections f or the subprocesses $e^{+}e^{-} \to ϕπ^{0}π^{0}$, $K^{+}(1460)K^{-}$, $K^{+}_{1}(1400)K^{-}$, $K^{+}_{1}(1270)K^{-}$ and $K^{*+}(892)K^{*-}(892)$, are measured versus the center-of-mass energy. The corresponding results for $e^{+}e^{-} \to K^{+}K^{-}π^{0}π^{0}$ and $ϕπ^{0}π^{0}$ are consistent with those of BaBar and have much improved precision.By analyzing the cross sections for the four subprocesses, $K^{+}(1460)K^{-}$, $K^{+}_{1}(1400)K^{-}$, $K^{+ }_{1}(1270)K^{-}$ and $K^{*+}K^{*-}$, a structure with mass $M$ = (2126.5 $\pm$ 16.8 $\pm$ 12.4)~MeV/c^{2} and width $Γ$ = (106.9 $\pm$ 32.1 $\pm$ 28.1)~MeV is observed with an overall statistical significance of 6.3 $σ$, although with very limited significance in the subprocesses $e^{+}e^{-} \to K^{+}_{1}(1270)K^{-}$ and $K^{*+}(892)K^{*-}(892)$. The resonant parameters of the observed structure suggest it can be identified with the $ϕ(2170)$, thus the results provide valuable input to the internal nature of the $ϕ(2170)$.

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