Observation of a resonant structure in $e^{+}e^{-} \to K^{+}K^{-}\pi^{0}\pi^{0}$
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. 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.,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. K.,Himmelreich M.,Holtmann T.,~Hou Y. ~R.,~Hou Z. ~L.,~Hu H. ~M.,~Hu J. ~F.,~Hu T.,~Hu Y.,~Huang G. ~S.,~Huang L. ~Q.,~Huang X. ~T.,~Huesken N.,~Hussain T.,Andersson W. ~Ikegami,~Imoehl W.,~Irshad M.,~Jaeger S.,~Janchiv S.,~Ji Q.,~Ji Q. ~P.,~Ji X. ~B.,~Ji X. ~L.,~Jiang H. ~B.,~Jiang X. ~S.,~Jiang X. ~Y.,~Jiao J. ~B.,~Jiao Z.,~Jin D. ~P.,~Jin S.,~Jin Y.,~Johansson T.,~Kalantar-Nayestanaki N.,~Kang X. ~S.,~Kappert R.,~Kavatsyuk M.,~Ke B. ~C.,~Keshk I. ~K.,~Khoukaz A.,~Kiese P.,~Kiuchi R.,~Kliemt R.,~Koch L.,~Kolcu O. ~B.,~Kopf B.,~Kuemmel M.,~Kuessner M.,~Kupsc A.,~Kurth M. ~ G.,~Kühn W.,~Lane J. ~J.,~Lange J. ~S.,~Larin P.,~Lavezzi L.,~Leithoff H.,~Lellmann M.,~Lenz T.,~Li C.,~Li C. ~H.,Cheng~Li,~Li D. ~M.,~Li F.,~Li G.,~Li H. ~B.,~Li H. ~J.,~Li J. ~C.,~Li J. ~L.,Ke~Li,~Li L. ~K.,Lei~Li,~Li P. ~L.,~Li P. ~R.,~Li S. ~Y.,~Li W. ~D.,~Li W. ~G.,~Li X. ~H.,~Li X. ~L.,~Li X. ~N.,~Li Z. ~B.,~Li Z. ~Y.,~Liang H.,~Liang Y. ~F.,~Liang Y. ~T.,~Liao L. ~Z.,~Libby J.,~Lin C. ~X.,~Lin D. ~X.,~Liu B.,~Liu B. ~J.,~Liu C. ~X.,~Liu D.,~Liu D. ~Y.,~Liu F. ~H.,Fang~Liu,Feng~Liu,~Liu H. ~B.,~Liu H. ~M.,Huanhuan~Liu,Huihui~Liu,~Liu J. ~B.,~Liu J. ~Y.,~Liu K.,~Liu K. ~Y.,Ke~Liu,~Liu L.,~Liu L. ~Y.,~Liu Q.,~Liu S. ~B.,Shuai~Liu,~Liu T.,~Liu X.,~Liu X. ~Y.,~Liu Y. ~B.,~Liu Z. ~A.,~Liu Z. ~Q.,~Long Y. ~F.,~Lou X. ~C.,~Lu H. ~J.,~Lu J. ~D.,~Lu J. ~G.,~Lu X. ~L.,~Lu Y.,~Lu Y. ~P.,~Luo C. ~L.,~Luo M. ~X.,~Luo P. ~W.,~Luo T.,~Luo X. ~L.,~Lusso S.,~Lyu X. ~R.,~Ma F. ~C.,~Ma H. ~L.,~Ma L. ~L.,~Ma M. ~M.,~Ma Q. ~M.,~Ma R. ~Q.,~Ma R. ~T.,~Ma X. ~N.,~Ma X. ~X.,~Ma X. ~Y.,~Ma Y. ~M.,~Maas F. ~E.,~Maggiora M.,~Maldaner S.,~Malde S.,~Malik Q. ~A.,~Mangoni A.,~Mao Y. ~J.,~Mao Z. ~P.,~Marcello S.,~Meng Z. ~X.,~Messchendorp J. ~G.,~Mezzadri G.,~Min J.,~Min T. ~J.,~Mitchell R. ~E.,~Mo X. ~H.,~Mo Y. ~J.,Morales C. ~Morales,~Muchnoi N. ~Yu.,~Muramatsu H.,~Nakhoul S.,~Nefedov Y.,~Nerling F.,~Nikolaev I. ~B.,~Ning Z.,~Nisar S.,~Olsen S. ~L.,~Ouyang Q.,~Pacetti S.,~Pan X.,~Pan Y.,~Papenbrock M.,~Pathak A.,~Patteri P.,~Pelizaeus M.,~Peng H. ~P.,~Peters K.,~Pettersson J.,~Ping J. ~L.,~Ping R. ~G.,~Pitka A.,~Poling R.,~Prasad V.,~Qi H.,~Qi H. ~R.,~Qi M.,~Qi T. ~Y.,~Qian S.,~Qiao C. ~F.,~Qin L. ~Q.,~Qin X. ~P.,~Qin X. ~S.,~Qin Z. ~H.,~Qiu J. ~F.,~Qu S. ~Q.,~Rashid K. ~H.,~Ravindran K.,~Redmer C. ~F.,~Richter M.,~Rivetti A.,~Rodin V.,~Rolo M.,~Rong G.,~Rosner Ch.,~Rump M.,~Sarantsev A.,~Savrié M.,~Schelhaas Y.,~Schnier C.,~Schoenning K.,~Shan D. ~C.,~Shan W.,~Shan X. ~Y.,~Shao M.,~Shen C. ~P.,~Shen P. ~X.,~Shen X. ~Y.,~Sheng H. ~Y.,~Shi H. ~C.,~Shi R. ~S.,~Shi X.,~D~Shi X.,~Song J. ~J.,~Song Q. ~Q.,~Song X. ~Y.,~Song Y. ~X.,~Sosio S.,~Sowa C.,~Spataro S.,~Sui F. ~F.,~Sun G. ~X.,~Sun J. ~F.,~Sun L.,~Sun S. ~S.,~Sun T.,~Sun W. ~Y.,~Sun Y. ~J.,~K~Sun Y.,~Sun Y. ~Z.,~Sun Z. ~J.,~Sun Z. ~T.,~Tan Y. ~X.,~Tang C. ~J.,~Tang G. ~Y.,~Tang J.,~Tang X.,~Thoren V.,~Tsednee B.,~Uman I.,~Wang B.,~Wang B. ~L.,~Wang C. ~W.,~Wang D. ~Y.,~Wang H. ~P.,~Wang K.,~Wang L. ~L.,~Wang L. ~S.,~Wang M.,~Wang M. ~Z.,Meng~Wang,~Wang P. ~L.,~Wang W. ~P.,~Wang X.,~Wang X. ~F.,~Wang X. ~L.,~Wang Y.,~Wang Y. ~D.,~Wang Y. ~F.,~Wang Y. ~Q.,~Wang Z.,~Wang Z. ~G.,~Wang Z. ~Y.,Ziyi~Wang,Zongyuan~Wang,~Weber T.,~Wei D. ~H.,~Weidenkaff P.,~Weidner F.,~Wen H. ~W.,~Wen S. ~P.,~White D. ~J.,~Wiedner U.,~Wilkinson G.,~Wolke M.,~Wollenberg L.,~Wu J. ~F.,~Wu L. ~H.,~Wu L. ~J.,~Wu X.,~Wu Z.,~Xia L.,~Xiao H.,~Xiao S. ~Y.,~Xiao Y. ~J.,~Xiao Z. ~J.,~Xie Y. ~G.,~Xie Y. ~H.,~Xing T. ~Y.,~Xiong X. ~A.,~Xu G. ~F.,~Xu J. ~J.,~Xu Q. ~J.,~Xu W.,~Xu X. ~P.,~Yan L.,~Yan W. ~B.,~Yan W. ~C.,Xu~Yan,~Yang H. ~J.,~Yang H. ~X.,~Yang L.,~Yang R. ~X.,~Yang S. ~L.,~Yang Y. ~H.,~Yang Y. ~X.,Yifan~Yang,Zhi~Yang,~Ye M.,~Ye M. ~H.,~Yin J. ~H.,~You Z. ~Y.,~Yu B. ~X.,~Yu C. ~X.,~Yu G.,~Yu J. ~S.,~Yu T.,~Yuan C. ~Z.,~Yuan W.,~Yuan X. ~Q.,~Yuan Y.,~Yue C. ~X.,~Yuncu A.,~Zafar A. ~A.,~Zeng Y.,~Zhang B. ~X.,~Zhang B. ~Y.,~Zhang C. ~C.,~Zhang D. ~H.,Guangyi~Zhang,~Zhang H. ~H.,~Zhang H. ~Y.,~Zhang J. ~L.,~Zhang J. ~Q.,~Zhang J. ~W.,~Zhang J. ~Y.,~Zhang J. ~Z.,Jianyu~Zhang,Jiawei~Zhang,~Zhang L.,Lei~Zhang,~Zhang S.,~Zhang S. ~F.,~Zhang T. ~J.,~Zhang X. ~Y.,~Zhang Y.,~Zhang Y. ~H.,~Zhang Y. ~T.,Yan~Zhang,Yao~Zhang,Yi~Zhang,~Zhang Z. ~H.,~Zhang Z. ~Y.,~Zhao G.,~Zhao J.,~Zhao J. ~W.,~Zhao J. ~Y.,~Zhao J. ~Z.,Lei~Zhao,Ling~Zhao,~Zhao M. ~G.,~Zhao Q.,~Zhao S. ~J.,~Zhao T. ~C.,~Zhao Y. ~B.,~Zhao Z. ~G.,~Zhemchugov A.,~Zheng B.,~Zheng J. ~P.,~Zheng Y.,~Zheng Y. ~H.,~Zhong B.,~Zhong C.,~Zhou L.,~Zhou L. ~P.,~Zhou Q.,~Zhou X.,~Zhou X. ~K.,~Zhou X. ~R.,~Zhu A. ~N.,~Zhu J.,~Zhu K.,~Zhu K. ~J.,~Zhu S. ~H.,~Zhu W. ~J.,~Zhu X. ~L.,~Zhu Y. ~C.,~Zhu Y. ~S.,~Zhu Z. ~A.,~Zhuang J.,~Zou B. ~S.,~Zou J. ~H.
arxiv（2020）
引用46|浏览122
暂无评分
摘要
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 $e^{+}e^{-} \to K^{+}K^{-}\pi^{0}\pi^{0}$. The total Born cross sections for the process $e^{+}e^{-} \to K^{+}K^{-}\pi^{0}\pi^{0}$, as well as the Born cross sections f or the subprocesses $e^{+}e^{-} \to \phi \pi^{0}\pi^{0}$, $K^{+}(1460)K^{-}$, $K^{+}_{1}(1400)K^{-}$, $K^{+}_{1}(1270)K^{-}$ and $K^{*+}(892)K^{*-}(892)$, are measured versus the center-of-mass energy. The corresponding results for $e^{+}e^{-} \to K^{+}K^{-}\pi^{0}\pi^{0}$ and $\phi \pi^{0}\pi^{0}$ 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 $\Gamma$ = (106.9 $\pm$ 32.1 $\pm$ 28.1)~MeV is observed with an overall statistical significance of 6.3 $\sigma$, 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 $\phi(2170)$, thus the results provide valuable input to the internal nature of the $\phi(2170)$.
