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arXiv 0710.0118nucl-ex
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在20 A和30 A GeV中心Pb+Pb碰撞中π介子和K介子的产生:解除禁闭开始的证据

Pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV: Evidence for the onset of deconfinement

NA49 Collaboration

摘要:

给出了20A和30AGeV中心Pb+Pb碰撞中带电π介子和K介子产生的结果,并与低能和高能的数据进行了比较。一个快速的变化的能量依赖性观察到30 A GeV附近的π介子和K介子的产率以及横向质谱的形状。这一变化与在碰撞早期阶段产生非精细物质状态的阈值位于低SPS能量的预测是一致的。

英文摘要:

Results on charged pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV are presented and compared to data at lower and higher energies. A rapid change of the energy dependence is observed around 30A GeV for the yields of pions and kaons as well as for the shape of the transverse mass spectra. The change is compatible with the prediction that the threshold for production of a state of deconfined matter at the early stage of the collisions is located at low SPS energies.

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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