arXiv 1302.08312013-02hep-phnucl-th

LHC时代J/psi抑制的量子力学模型

Quantum mechanical model for J/psi suppression in the LHC era

C. Pena, D. Blaschke

备注：: 8 pages, 5 figures, Introduction enlarged, References added
DOI：: 10.1016/j.nuclphysa.2014.02.020

摘要：

在含时谐振子（THO）模型中，讨论了屏蔽、吸收和再生效应对夸克偶子态量子力学演化的影响.我们将计算结果与CERN和RHIC实验的R_AA/R_AA（CNM）数据进行了比较。在没有测量冷核物质（CNM）的影响，在大型强子对撞机，我们估计他们的作用，并解释最近的数据从ALICE实验。我们还讨论了振荡器频率的实部和虚部的温度依赖性，分别代表屏蔽和吸收/再生。我们指出，在SPS的In-In碰撞J/psi抑制图案的结构可能是最近发现的粲偶素谱中的X（3872）状态。强关联介质中重夸克偶素的等离子体哈密顿量的集团展开为这一假设提供了理论支持。

英文摘要：

We discuss the interplay of screening, absorption and regeneration effects, on the quantum mechanical evolution of quarkonia states, within a time-dependent harmonic oscillator (THO) model with complex oscillator strength. We compare the results with data for R_AA/R_AA(CNM) from CERN and RHIC experiments. In the absence of a measurement of cold nuclear matter (CNM) effects at LHC we estimate their role and interpret the recent data from the ALICE experiment. We also discuss the temperature dependence of the real and imaginary parts of the oscillator frequency which stand for screening and absorption/regeneration, respectively. We point out that a structure in the J/psi suppression pattern for In-In collisions at SPS is possibly related to the recently found X(3872) state in the charmonium spectrum. Theoretical support for this hypothesis comes from the cluster expansion of the plasma Hamiltonian for heavy quarkonia in a strongly correlated medium.

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