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arXiv 1306.2350hep-phnucl-th
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在高多重数pp和pA碰撞中质子、π介子和K介子的横动量:彩色玻璃凝聚体的证据?

Transverse Momentum of Protons, Pions and Kaons in High Multiplicity pp and pA Collisions: Evidence for the Color Glass Condensate?

Larry McLerran, Michal Praszalowicz, Bjoern Schenke

摘要:

大型强子对撞机上的CMS实验最近提供了质子、kaons和pions的平均横向动量作为粒子多重性函数的数据。我们与粒子的多重性饱和动量使用最近公布的计算的相互作用半径确定的彩色玻璃凝聚体的理论。我们表明,PP和PA的实验数据规模在这些饱和动量。计算横向动量谱确定粒子使用玻尔兹曼型分布和相关的不同关联的多重性使用几何缩放,这些简单的分布再现所观察到的依赖性的平均横向动量粒子多重性看到在PP和PA相互作用的π介子良好的准确性,并公平协议的质子和K介子。

英文摘要:

The CMS experiment at the Large Hadron Collider has recently presented data on the average transverse momentum of protons, kaons and pions as a function of particle multiplicity. We relate the particle multiplicity to saturation momentum using recently published computations of the interaction radius determined from the theory of the Color Glass Condensate. We show that the pp and the pA experimental data scale in terms of these saturation momenta. Computing transverse momentum spectra for identified particles using Boltzmann-type distributions and relating different associated multiplicities using geometric scaling, these simple distributions reproduce the observed dependence of the mean transverse momentum on particle multiplicities seen in both pp and pA interactions for pions to good accuracy, and to fair agreement for protons and kaons.

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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