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arXiv 2104.09908hep-phhep-ex
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$ψ$衰变产生重子-反重子对的有效半径

The effective radius for production of baryon-antibaryon pairs from $ψ$ decays

Shu-Ming Wu, Jia-Jun Wu, Bing-Song Zou

摘要:

利用BESIII合作组的$ψ(1^-) \to B_8(1/2^+) \bar{B}_8(1/2^-)$的最新资料,利用协变L-S分波方法,推导了S波和D波贡献的比值。对于$J/ψ\to Λ\barΛ$和$J/ψ(ψ(2S))\to Σ^{+}\barΣ^{-}$,比率是固定的,并且计算平均角动量以估计这些过程的有效半径。结果表明,$J/ψ(ψ(2S))$的这些衰变的有效半径非常小,约为0.04 fm。因此,这是一个很好的地方,以寻找激发重子共振与低自旋的$J/ψ(ψ(2S))$衰变。此外,对于其他$ψ(1^-) \to B_8(1/2^+) \bar{B}_8(1/2^-)$反应,我们提出了一些方法来获得这样的有效半径。

英文摘要:

By using the covariant L-S Scheme for the partial wave analysis, we deduce the ratios between the S-wave and D-wave contributions from the recent data of $ψ(1^-) \to B_8(1/2^+) \bar{B}_8(1/2^-)$ from the BESIII collaboration. For the $J/ψ\to Λ\barΛ$ and $J/ψ(ψ(2S))\to Σ^{+}\barΣ^{-}$, the ratios are fixed and the average angular momenta are computed to estimate the effective radii of these processes. The results show that the effective radii of these decays of $J/ψ(ψ(2S))$ are very small, which are around 0.04 fm. Thus, it is a nice place to search excited baryon resonances with lower spin in the decays of $J/ψ(ψ(2S))$. Furthermore, for the other $ψ(1^-) \to B_8(1/2^+) \bar{B}_8(1/2^-)$ reactions, we propose some methods to get such effective radius.

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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