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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1409.0040nucl-thhep-phnucl-ex
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模拟C+C,Al+Al,Cu+Cu,Au+Au和Pb+Pb中心核碰撞的粒子谱和HBT半径(Sqrt(s)=62.4-2760 GeV)

Particle spectra and HBT radii for simulated central nuclear collisions of C+C, Al+Al, Cu+Cu, Au+Au, and Pb+Pb from Sqrt(s)=62.4-2760 GeV

M. Habich, J. L. Nagle, P. Romatschke

摘要:

本文采用一个结合了预平衡流、粘性流体力学和后期强子再散射的超杂化重离子碰撞模型(SONIC),研究了中心对称和助推不变核碰撞中的温度分布、π介子谱和HBT半径。特别是,我们模拟了Pb+Pb碰撞在Sqrt(s)=2.76 TeV,Au+Au,Cu+Cu,Al+Al和C+C碰撞在Sqrt(s)=200 GeV和Au+Au,Cu+Cu碰撞在Sqrt(s)=62.4 GeV。我们发现,SONIC提供了一个很好的匹配所有的碰撞系统和能量的π介子光谱和HBT半径,确认早期的工作,结合预平衡流,粘度和QCD状态方程可以解决所谓的HBT难题。作为参考,我们还显示了在Sqrt(s)=7 TeV的p+p碰撞。我们将所有系统的2+1维温度演化的数据制成表格,供将来的射流能量损失或类似研究使用。

英文摘要:

We study the temperature profile, pion spectra and HBT radii in central symmetric and boost-invariant nuclear collisions using a super hybrid model for heavy-ion collisions (SONIC) combining pre-equilibrium flow with viscous hydrodynamics and late-stage hadronic rescatterings. In particular, we simulate Pb+Pb collisions at Sqrt(s)=2.76 TeV, Au+Au, Cu+Cu, Al+Al, and C+C collisions at Sqrt(s)=200 GeV and Au+Au, Cu+Cu collisions at Sqrt(s)=62.4 GeV. We find that SONIC provides a good match to the pion spectra and HBT radii for all collision systems and energies, confirming earlier work that a combination of pre-equilibrium flow, viscosity and QCD equation of state can resolve the so-called HBT puzzle. For reference, we also show p+p collisions at Sqrt(s)=7 TeV. We make tabulated data for the 2+1 dimensional temperature evolution of all systems publicly available for the use in future jet energy loss or similar studies.

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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