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arXiv 2305.08043hep-ex
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BESIII上的轴子类粒子搜寻

ALPs searches at BESIII

Peicheng Jiang

AI总结:

基于BESIII的27亿$\psi(3686)$事例,搜寻轴子类粒子,未发现信号,设定$J/\psi\rightarrow\gamma a$分支比和ALP-光子耦合的最严格上限。

摘要:

本文介绍了利用BESIII探测器收集的27亿个$\psi(3686)$事例对轴子类粒子(ALP)的搜寻。未观察到显著信号,在$0.165\leq m_a\leq 2.84$ GeV/$c^2$质量范围内,于95%置信水平上设定了$J/\psi\rightarrow\gamma a$衰变分支比及ALP-光子耦合常数$g_{a\gamma\gamma}$的上限。在搜寻区域内,$B(J/\psi\rightarrow\gamma a)$的限制范围为$8.3\times10^{-8}$至$1.8\times10^{-6}$,且对ALP-光子耦合的约束在$0.165\leq m_a\leq 1.468$ GeV/$c^2$区间内为迄今最严格。

英文摘要:

A search for an axion-like particle with 2.7 billion $ψ(3686)$ events collected by the BESIII detector is presented. No significant signal is observed, and the upper limits on the branching fraction of $J/ψ\rightarrowγa$ and the ALP-photon coupling constant $g_{aγγ}$ are set at the 95% confidence level in the mass range of $0.165\leq m_a\leq 2.84$ GeV/$c^2$. The limits on $B(J/ψ\rightarrowγa)$ range from $8.3\times10^{-8}$ to $1.8\times10^{-6}$ over the search region, and the constraints on the ALP-photon coupling are the most stringent to date for $0.165\leq m_a\leq 1.468$ GeV/$c^2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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