Observation of a resonant structure in \(e^{+}e^{-} \to K^{+}K^{-}\pi^{0}\pi^{0}\)

• Published in: arXiv.org
• Main Authors: Anita, Bai, Y, Berger, N, Bettoni, D, Cetin, S A, Chang, W L, Chen, M L, Denysenko, I, De Mori, F, Dong, M Y, Fang, J, Gao, Y G, Gong, W X, Guo, R P, Han, T T, Heng, Y K, Himmelreich, M, J ~F ~Hu, X ~B ~Ji, X ~Y ~Jiang, J ~B ~Jiao, Y ~Jin, X ~S ~Kang, M ~Kavatsyuk, P ~Larin, M ~Lellmann, T ~Lenz, Cheng~Li, G ~Li, H ~J ~Li, Lei~Li, W ~D ~Li, Z ~B ~Li, Y ~F ~Liang, B ~Liu, D ~Y ~Liu, Feng~Liu, J ~Y ~Liu, X ~C ~Lou, H ~J ~Lu, J ~D ~Lu, X ~L ~Lu, M ~X ~Luo, P ~W ~Luo, Q ~M ~Ma, Y ~M ~Ma, Y ~J ~Mao, S ~Marcello, G ~Mezzadri, R ~E ~Mitchell, S ~L ~Olsen, Y ~Pan, J ~Pettersson, V ~Prasad, H ~Qi, M ~Qi, L ~Q ~Qin, Y ~Schelhaas, C ~Schnier, W ~Shan, X ~Y ~Shen, Z ~J ~Sun, V ~Thoren, B ~L ~Wang, C ~W ~Wang, H ~P ~Wang, X ~Wang, X ~F ~Wang, Y ~F ~Wang, Z ~Wang, Z ~G ~Wang, Z ~Y ~Wang, T ~Weber, F ~Weidner, H ~W ~Wen, M ~Wolke, L ~Wollenberg, J ~F ~Wu, Z ~J ~Xiao, G ~F ~Xu, J ~J ~Xu, W ~Xu, Y ~X ~Yang, M ~Ye, B ~X ~Yu, C ~Z ~Yuan, X ~Q ~Yuan, Y ~Yuan, J ~Y ~Zhang, S ~F ~Zhang, T ~J ~Zhang, X ~Y ~Zhang, Yi~Zhang, Z ~H ~Zhang, J ~Zhao, Q ~Zhao, S ~J ~Zhao, A ~Zhemchugov, J ~P ~Zheng, S ~H ~Zhu
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 13.01.2020
• Subjects: Center of mass; Cross-sections; Luminosity; Parameter identification; Statistical methods
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2001.04131

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 \(\phi(2170)\).