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arXiv 1406.2736hep-ph
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200个GeV和7个TeV p+p碰撞中胶子干涉的方位角四极关联

Azimuthal quadrupole correlation from gluon interference in 200 GeV and 7 TeV p+p collisions

R. L. Ray

摘要:

将Levin和Rezaeian的Balitskii-Fadin-Kuraev-Lipatov(BFKL)多Pomeron模型推广到胶子饱和区,应用于$\sqrt{s}$ = 200~GeV和7~TeV p+p碰撞中产生的低动量末态强子的长程赝快度关联.通过拟合最小偏差p+p多重数频率分布估计了模型中的多Pomeron交换几率。当使用理论上预期的胶子饱和动量标度时,多Pomeron模型对最小偏置平均四极关联的振幅(与$\cos 2(ϕ_1 - ϕ_2)$成正比)的预测与200 GeV的数据是一致的.对高多重数7~TeV p+p碰撞数据的关联预测也与数据中观测到的小相对方位角下的长程赝快度关联相一致。结果表明,目前的应用程序的多部分子簇射,胶子干涉机制产生的远程赝快度,方位角四极关联是不排除的数据。

英文摘要:

The Balitskii-Fadin-Kuraev-Lipatov (BFKL) multi-Pomeron model of Levin and Rezaeian, with extension to the gluon saturation region, is applied to long-range pseudorapidity correlations on relative azimuth for low momentum final-state hadrons produced in $\sqrt{s}$ = 200~GeV and 7~TeV p+p collisions. The multi-Pomeron exchange probabilities in the model were estimated by fitting the minimum-bias p+p multiplicity frequency distributions. The multi-Pomeron model prediction for the amplitude of the minimum-bias average quadrupole correlation, proportional to $\cos 2(ϕ_1 - ϕ_2)$, is consistent with the 200~GeV data when theoretically expected gluon saturation momentum scales are used. Correlation predictions for the high multiplicity 7~TeV p+p collision data are also consistent with the long-range pseudorapidity correlations at small relative azimuth observed in the data. The results presented here show that the present application of a multiple parton-shower, gluon interference mechanism for generating the long-range pseudorapidity, azimuthal quadrupole correlation is not excluded by the data.

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