全局拟合共振参数的确定* * 国家自然科学基金资助项目（11805090

IF 3.6 2区物理与天体物理 Q1 PHYSICS, NUCLEAR

中国物理C Pub Date : 2024-06-01 DOI:10.1088/1674-1137/ad3943

Chunhua Li, Xijun Wang, Chen Wu

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引用次数: 0

摘要

贝尔实验首次在过程中的不变质谱中观测到该粒子，随后巴巴尔实验证实了这一点。两次实验都报告了该粒子在过程中的共振参数，并假设为 S 波布雷特-维格纳共振。我们对 Belle 和 BaBar 实验所测得的该粒子的不变质量分布进行了全局拟合，并结合 LHCb 实验所报告的测量结果，提取了该粒子的质量和宽度。我们得到了 MeV/ 和 MeV，与 PDG 的值一致，误差在一个标准差之内，但精度更高。

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Determination of the resonant parameters of with global fit* * Supported by National Natural Science Foundation of China (NSFC) (11805090)

Particle

was first observed by the Belle experiment in the

invariant mass spectrum in the process

and subsequently confirmed by the BaBar experiment. Both experiments reported the resonant parameters of this particle in the processes

and

assuming

as an S-wave Breit-Wigner resonance. We performed a global fit to the distributions of invariant mass of

measured by the Belle and BaBar experiments and additionally incorporated the measurements reported by the LHCb experiment to extract the mass and width of

. We obtained

MeV/

and

MeV, which are consistent with the values from PDG within one standard deviation but with higher precision.

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来源期刊

中国物理C 物理-物理：核物理

CiteScore

6.50

自引率

8.30%

发文量

8976

审稿时长

1.3 months

期刊介绍： Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of: Particle physics; Nuclear physics; Particle and nuclear astrophysics; Cosmology; Accelerator physics. The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication. The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal. The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.