تقرير
Novel method for identifying the heaviest QED atom
| العنوان: | Novel method for identifying the heaviest QED atom |
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| المؤلفون: | Fu, Jing-Hang, Jia, Sen, Zhou, Xing-Yu, Zhang, Yu-Jie, Shen, Cheng-Ping, Yuan, Chang-Zheng |
| المصدر: | Science Bulletin 2024; 69(10): 1386-1391 |
| سنة النشر: | 2023 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | The bound state of a $\tau^+\tau^-$ pair by the electromagnetic force is the heaviest and smallest QED atom. Since the discovery of the two lightest QED atoms more than 60 years ago, no evidence for the third one has been found. We demonstrate that the $J_\tau$ ($\tau^+\tau^-$ atom with $J^{PC}=1^{--}$) resonance signal can be observed with a significance larger than $5\sigma$ including both statistical and systematic uncertainties, via the process $e^+e^-\to X^+ Y^- \slashed{E}$ ($X,\,Y=e$, $\mu$, $\pi$, $K$, or $\rho$, and $\slashed{E}$ is the missing energy) with $1.5~{\rm ab^{-1}}$ data taken around the $\tau$ pair production threshold. The $\tau$ lepton mass can be measured in a precision of 2 keV with the same data sample. This is within one year's running time of the proposed super tau-charm factory or super charm-tau factory. Comment: 7 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.scib.2024.04.003 |
| URL الوصول: | http://arxiv.org/abs/2305.00171 |
| رقم الأكسشن: | edsarx.2305.00171 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.scib.2024.04.003 |
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