Charmonium, B c and X(3872) Transport at the LHC

Charmonium, B c and X(3872) Transport at the LHC
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Charmium、B c 和 X(3872) 在大型强子对撞机上的传输

DOI:
10.1051/epjconf/202327602001
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发表时间:
2023
影响因子:
--
通讯作者:
Rapp, Ralf
Rapp, Ralf
中科院分区:
--
文献类型:
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作者:
Wu, Biaogang;Tang, Zhanduo;He, Min;Rapp, Ralf

文献摘要

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我们采用动力学速率方程来评估超相对论重离子碰撞中 J/ψ、ψ(2S)、Bcan 和 X(3872) 的输运,并将它们的产生率与大型强子对撞机的实验数据进行比较。速率方程有两个主要传输参数:平衡极限和每个状态的反应速率。与温度相关的平衡极限包括基于初始产生的粲夸克和底夸克逸度。 chamonia、bottomonia 和 Bcly 的反应速率取决于热力学 T 矩阵方法中的粲夸克质量和底夸克质量以及结合能。对于 X(3872) 粒子,内部结构信息通过两种不同的场景编码在强子相的反应速率和初始条件中:松散束缚的强子分子与致密的四夸克。
We deploy a kinetic-rate equation to evaluate the transport ofJ/ψ, ψ(2S),BcandX(3872) in ultrarelativistic heavy-ion collisions and compare their production yields to experimental data from the Large Hadron Collider. The rate equation has two main transport parameters: the equilibrium limit and reaction rate for each state. The temperature-dependent equilibrium limits include charm- and bottom-quark fugacities based on their initial production. The reaction rates for charmonia, bottomonia andBcrely on charm- and bottomquark masses and binding energies from a thermodynamicT-matrix approach. For theX(3872) particle, internal structure information is encoded in reaction rates and initial conditions in the hadronic phase via two different scenarios: a loosely bound hadronic molecule vs. a compact tetraquark.