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首页> 外文期刊>Physical review, D >Production of exotic tetraquarks QQqˉqˉ in heavy-ion collisions at the LHC
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Production of exotic tetraquarks QQqˉqˉ in heavy-ion collisions at the LHC

机译：在大型强子对撞机的重离子碰撞中生产奇异四夸克QQqˉqˉ

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We investigate the production of exotic tetraquarks, Q Q q ˉ q ˉ ≡ T Q Q ( Q = c or b and q = u or d ), in relativistic heavy-ion collisions using the quark coalescence model. The T Q Q yield is given by the overlap of the density matrix of the constituents in the emission source with the Wigner function of the produced tetraquark. The tetraquark wave function is obtained from exact solutions of the four-body problem using realistic constituent models. The production yields are typically one order of magnitude smaller than previous estimations based on simplified wave functions for the tetraquarks. We also evaluate the consequences of the partial restoration of chiral symmetry at the hadronization temperature on the coalescence probability. Such effects, in addition to increasing the stability of the tetraquarks, lead to an enhancement of the production yields, pointing towards an excellent discovery potential in forthcoming experiments. We discuss further consequences of our findings for the search of exotic tetraquarks in central Pb + Pb collisions at the LHC.
机译：我们使用夸克合并模型研究相对论重离子碰撞中奇异四夸克Q Q q q q T Q Q（Q = c或b且q = u或d）的产生。通过排放源中成分的密度矩阵与产生的四夸克的维格纳函数的重叠，可以得出T Q Q产量。四夸克波函数是使用逼真的组成模型从四体问题的精确解中获得的。产量通常比基于四夸克简化波函数的先前估计小一个数量级。我们还评估了强子化温度下手性对称性部分恢复对聚结概率的影响。除了增加四夸克的稳定性外，这种效应还导致产量的提高，这表明在即将进行的实验中具有极好的发现潜力。我们讨论了在大型强子对撞中心中铅与铅碰撞中寻找奇异四夸克时发现的进一步结果。

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