arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.3652hep-ph
收藏

从J/psi -> phi a0测量a0(980)- f0(980)混合的可能性

Possibility of measuring a0(980)-f0(980) mixing from J/psi -> phi a0

Jia-Jun Wu, Qiang Zhao, B. S. Zou

摘要:

a0(980)-f0(980)混合强度在0.01 - 0.1之间,但缺乏可靠的实验观测。在北京正负电子对撞机上,利用BESIII探测器研究了从J/psi -> phi f0 -> phi a0反应中提取a0(980)-f0(980)混合的可能性。虽然通过a0(980)-f0(980)混合的该过程的分支比预期为约$O(10^{-6})$,类似于来自两个背景反应J/psi -> gamma* -> phi a0和J/psi -> K* K + c.c.的估计总量。-> phi a0,a0(980)-f0(980)混合的峰宽约为8 MeV,远小于其它机制的峰宽。利用BESIII的$10^9$ $J/ψ$事件,a0(980)-f0(980)混合强度有望得到明确而精确的测量。

英文摘要:

The a0(980)-f0(980) mixing intensity has been predicted to be in the range of 0.01 to 0.1 by various theoretical models, but lacking firm experimental observation. We examine the possibility of extracting the a0(980)-f0(980) mixing from J/psi -> phi f0 -> phi a0 reaction at upgraded Beijing Electron Positron Collider with BESIII detector. While the branching ratio of this process through the a0(980)-f0(980) mixing is expected to be about $O(10^{-6})$ similar to the estimated total amount from two background reactions J/psi -> gamma* -> phi a0 and J/psi -> K* K + c.c. -> phi a0, the peak width from the a0(980)-f0(980) mixing is about 8 MeV, much smaller than that from other mechanisms. With $10^9$ $J/ψ$ events at BESIII, the a0(980)-f0(980) mixing intensity is expected to be unambiguously and precisely measured.

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。

↑