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arXiv 0808.0358hep-ph
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多组分强子气体中的J/ $ψ$吸收

J/$ψ$ absorption in a multicomponent hadron gas

Dariusz Prorok, Ludwik Turko, David Blaschke

摘要:

本文提出了高能重离子碰撞中反常$J/Ψ$抑制的模型。作为标准核吸收之外的附加抑制机制,考虑了强子物质的非弹性$J/Ψ$散射。强子物质被建模为一个不断演变的多组分气体的点状非相互作用粒子(MCHG)。给出了MCHG的声速估计,并将状态方程与格点量子色动力学数据在退禁闭相变附近进行了比较。给出了纵向膨胀引起的近似冷却模式。结果表明,在这些条件下,所得到的$J/Ψ$抑制模式与NA 38和NA 50数据吻合得很好。

英文摘要:

A model for anomalous $J/Ψ$ suppression in high energy heavy ion collisions is presented. As the additional suppression mechanism beyond standard nuclear absorption inelastic $J/Ψ$ scattering with hadronic matter is considered. Hadronic matter is modeled as an evolving multi-component gas of point-like non-interacting particles (MCHG). Estimates for the sound velocity of the MCHG are given and the equation of state is compared with Lattice QCD data in the vicinity of the deconfinement phase transition. The approximate cooling pattern caused by longitudinal expansion is presented. It is shown that under these conditions the resulting $J/Ψ$ suppression pattern agrees well with NA38 and NA50 data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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