Stored antiproton beams at the international FAIR facility will provide unique opportunities to study hyperons as well as antihyperons in nuclear systems. Precise $γ$-spectroscopy of multi-strange hypernuclei will serve as a laboratory for the hyperon-hyperon interaction. Exclusive hadron-antihadron pair production close to threshold can measure the potential of a antihadron relative to that of the coincident hadrons.
In the present work we explore the production of excited states in double hypernuclei following the micro-canonical break-up of an initially excited double hypernucleus which is created by the absorption and conversion of a stopped $Ξ^{-}$ hyperon. Generally the formation of excited hypernuclear states relative to ground states dominates in this model. For different initial target nuclei which absorb the $Ξ^-$, different double hypernuclei nuclei dominate. We also compare the model predictions with the correlated pion spectra measured by the E906 collaboration.
In antiproton nucleus reactions the event-by-event transverse momentum correlations of hadron-antihadron pairs produced close to threshold contain information on the difference between the nuclear potential of the hadron and the associated antihadron. For produced D-meson pairs at 6.7\gevc1 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 {\PgX\PagX} pairs produced at 2.9\gevc1 the asymmetry is sufficiently sensitive to predicted differences between the {\PgX} and {\PagX} potentials even if the momentum and density dependence of the the potential are taken into account.
Production of Light (anti-)Nuclei with E864 at the AGS
在相对论重离子碰撞中，轻核可以在中心反应区通过聚并产生。BNL的E864在快度$y\simeq1.9$和$p_{T}/A\leq300MeV/c$上测量了10个核数为A=1至A=7的稳定轻核的产生。用11.5 A $GeV/c$动量的Au束在具有不同实验设置的Pb或Pt靶上获取数据。不变量产率显示出惊人的指数依赖于核数超过10个数量级的惩罚因子约为50每增加一个核子。这个惩罚因子被用来估计在重子丰富和奇异增强的环境中奇异夸克物质（奇异夸克）的产生。还测量了反质子、反氘、超核（$^{3}_ΛH$、$^{4}_ΛH$）和强不稳定核态（$^{4}H$、$^{5}Li$、$^{5}Li^{*}$、$^{5}He$）的产生。在$T=112\pm10MeV$的温度，$μ_{B}=503\pm20MeV$的化学势和大约$\sqrt{V_{\perp}^{2}}\simeq0.5c$的流速的动力学冻结的径向流的局部热平衡的模型似乎能够描述的数据在总规模的反超子和超核的生产除外。大量的反超子产生和对超核产生的额外惩罚是相当令人惊讶的。
Triaxially deformed relativistic point-coupling model for $Λ$ hypernuclei: a quantitative analysis of hyperon impurity effect on nuclear collective properties
Quadrupole deformation $(β,γ)$ of light $Λ$ hypernuclei in constrained relativistic mean field model: shape evolution and shape polarization effect of $Λ$ hyperon
Loosely-bound objects produced in nuclear collisions at the LHC
在大型强子对撞机（LHC）的质子-质子和核碰撞中，大量产生了轻核等松散结合的物体，尽管这种碰撞中的典型能量尺度超过物体的结合能几个数量级。在这篇评论中，我们总结了实验观察，把它们放在以前的研究背景下，在较低的能量，并讨论了潜在的物理。这里讨论的大部分数据都是由ALICE合作组织在LHC Run 1期间获得的，该运行始于2009年，于2013年结束。具体来说，我们专注于生产（反）核和（反）超核。还包括寻找奇异的物体，如H-双重子，一种可能的$uuddss$六夸克态，或者一种可能的$Λ$超子和中子的束缚态。此外，还简要讨论了通过测量关联研究超子-核子和超子-超子相互作用的问题，特别是讨论了由这些重子组成的松散束缚态的可能存在。此外，在奇怪的和迷人的强子部门的一些结果，显示在这个方向上的松散约束对象的未来测量的能力。最后，在目前正在进行的运行2期间的LHC和在未来的LHC运行3的测量的前景。
$Ξ^-$ hyperon and hypernuclear production in the $(K^-,K^+)$ reaction on nucleon and nuclei in a field theoretical model
在协变的有效拉格朗日模型下，我们分别研究了质子和核靶上的$(K^-,K^+)$反应中级联超子（$Ξ$）和束缚$Ξ^-$超核的产生。$K^+Ξ^-$产生顶点是由$K^-$介子与入射通道中的自由或束缚质子初始碰撞中$Λ$和$Σ$共振态的激发、传播和衰变来描述的。共振顶点的参数取自以前的研究和SU（3）对称性的考虑。该模型能够很好地描述$p(K^-, K^+)Ξ^-$反应的总截面和微分截面。同样的机制被用来描述超核生产反应$^{12}$ C $(K^-,K^+)^{12}{/!/!/!_{/Xi^-}}$ Be和$^{28}$ Si $(K^-,K^+)^{28}{/!/!/!_{Ξ^-}}$ Mg，其中$Ξ$束缚态旋量计算内的唯象模型已被采用。元核和超核产生截面都主要由$Λ$（1520）中间共振态的贡献所决定。发现形成$Ξ$超核的$0^\circ$微分截面对束流动量的依赖性与以前在冲量近似模型计算中所观察到的有显著的不同
