Study of the resonance structures in the process e+e−<mml:mo stretchy=
Study of the resonance structures in the process e+e−<mml:mo stretchy=
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DOI：
10.1103/physrevd.106.072001
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发表时间：
2022-10
影响因子：
5
通讯作者：
M. Ablikim;M. N. Achasov;P. Adlarson;M. Albrecht;R. Aliberti;A. Amoroso;M. An;Q. An;X. B
中科院分区：
文献类型：
--
作者：
M. Ablikim;M. N. Achasov;P. Adlarson;M. Albrecht;R. Aliberti;A. Amoroso;M. An;Q. An;X. B
利用在BEPCII存储环上运行的BESIII探测器收集的大约1 / 3的数据，在质量中心能量为3.7730至4.7008 GeV的范围内进行了born截面的精确测量。在能量依赖截面中观察到两个结构，被确定为状态和状态，其显著性大于。两种结构的质量和宽度分别为（M，Γ）=（4221.4±1.5±2.0 MeV/c2,41.8±2.9±2.7 MeV）和（M，Γ）=（4298±12±26 MeV/ c2127±17±10 MeV）。4.5 GeV左右的微弱增强，其意义为，与，相容，也可能表明谱中存在额外的共振。在截面拟合中包含这一额外贡献会影响状态的共振参数。
Using aboutof data collected with the BESIII detector operating at the BEPCII storage ring, a precise measurement of theBorn cross section is performed at center-of-mass energies from 3.7730 to 4.7008 GeV. Two structures, identified as theand thestates, are observed in the energy-dependent cross section with a significance larger than. The masses and widths of the two structures are determined to be (M,Γ)=(4221.4±1.5±2.0 MeV/c2,41.8±2.9±2.7 MeV) and (M,Γ)=(4298±12±26 MeV/c2,127±17±10 MeV), respectively. A small enhancement around 4.5 GeV with a significance about, compatible with the, might also indicate the presence of an additional resonance in the spectrum. The inclusion of this additional contribution in the fit to the cross section affects the resonance parameters of thestate.