NICA-MPD：方位角和飞秒粒子关联
NICA-MPD: azimuthal and femtoscopic particle correlations
摘要：
重点讨论了QCD的基本对称性（$\mathcal{P/CP}$）和粒子源的几何。本文研究了重离子碰撞中带电粒子分布相对于反应平面的绝对不对称性所对应的散射子组合。绝对不对称性的显着减少，观察到在中间的能量范围内，这可以被认为是作为可能的过渡到强子态的优势超过夸克-胶子自由度的混合相中创建的重离子碰撞在中间能量的指示。为了研究粒子源的几何性质的能量演化，建议使用以碰撞离子的平均半径为尺度的飞秒半径。这种方法允许扩展的一组相互作用类型，特别是，在碰撞的非对称离子束，可以在共同治疗的框架内进行研究。随着初始能量的增加，飞秒参数值没有急剧的变化。最后对今后NICA-MPD的研究提出了建议。
英文摘要：
The discussion is focused on the study of the fundamental symmetries ($\mathcal{P/CP}$) of QCD and geometry of the particle source. The combination of correlators corresponding to the absolute asymmetry of distribution of electrically charged particles with respect to the reaction plane in heavy ion collisions is studied. A significant decrease of the absolute asymmetry is observed in the intermediate energy range which can be considered as indication of possible transition to predominance of hadronic states over quark-gluon degrees of freedom in the mixed phase created in heavy ion collisions at intermediate energies. For the investigation of the energy evolution of the geometric properties of the particle source the use of femtoscopic radii scaled on the averaged radius of colliding ions is suggested. This approach allows the expansion of the set of interaction types, in particular, on the collisions of non-symmetrical ion beams which can be studied within the framework of common treatment. There is no sharp changing of femtoscopic parameter values with increasing of the initial energy. The suggestions are made for future advancement of these studies on NICA-MPD.
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