探索含反质子核中反超子的势能
Exploring the potential of antihyperons in nuclei with antiprotons
摘要：
本文提出了一种利用反质子核相互作用中接近阈值的超子-反超子对的产生来研究核中反超子相互作用的简单方法。由于能量和动量守恒，所产生的超子和反超子的逐事件横向动量关联包含了它们之间的势能差的信息。用蒙特卡罗模拟模拟了1.66GeV/c反质子+ $^{12}$ C $\to {Λ\barΛ}$反应的灵敏度。对于6.7GeV/c的D介子对，横动量关联的灵敏度可能太小，无法推导出D $^+$和D $^-$介子的势差。然而，对于在2.9GeV/c产生的$Ξ\barΞ$对，不对称性对预测的$Ξ$和$\barΞ$电位之间的差异足够敏感。
英文摘要：
A simple method to explore the interaction of antihyperons in nuclei by exclusive hyperon-antihyperon pair production close to threshold in antiproton nucleus interactions is proposed. Due to energy and momentum conservation event-by-event transverse momentum correlations of the produced hyperons and antihyperons contain information on the difference between their potentials. A schematic Monte Carlo simulation is used to illustrate the sensitivities of the proposed method for the reaction 1.66GeV/c antiproton+$^{12}$C $\to {Λ\barΛ}$. For produced D-meson pairs at 6.7GeV/c the sensitivity of the transverse momenta correlation will probably be to small to deduce differences between the potentials for D$^+$ and D$^-$ mesons. However, for $Ξ\barΞ$ pairs produced at 2.9GeV/c the asymmetry is sufficiently sensitive to predicted differences between the $Ξ$ and $\barΞ$ potentials.
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