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arXiv 1003.1913hep-ph
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关于LHC pp碰撞中带电强子产生的饱和

On saturation of charged hadron production in pp collisions at LHC

M. V. Tokarev, I. Zborovsky

摘要:

利用z标度方法分析了LHC CMS合作组首次获得的pp碰撞中带电强子横动量谱的结果。第一个LHC数据证实了z缩放。验证了在低能sqrt s = 19-1960 GeV pp和antp-pp相互作用中观测到的标度函数psi(z)的饱和区。到目前为止,在对撞机上达到的最高能量sqrt s = 2360 GeV时,发现带电强子的psi(z)饱和到z=0.05。强子生产的微观方案进行了讨论,在强子物质的相变的新的签名搜索。估计了组分能量损失及其对带电强子横动量和碰撞能的依赖性。建议在LHC上进行饱和区的束流能量扫描。

英文摘要:

First results on charged hadron transverse momentum spectra in pp collisions obtained by the CMS Collaboration at LHC were analyzed in z-scaling approach. The first LHC data confirm z-scaling. The saturation regime of the scaling function psi(z) observed in pp and antp-pp interactions at lower energy sqrt s = 19-1960 GeV is verified. The saturation of psi(z) for charged hadrons is found down to z=0.05 at the highest energy sqrt s = 2360 GeV reached till now at colliders. A microscopic scenario of hadron production is discussed in connection with search for new signatures of phase transitions in hadron matter. Constituent energy loss and its dependencies on the transverse momentum of charged hadrons and collision energy are estimated. The beam energy scan at LHC in the saturation region is suggested.

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