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arXiv 0906.4335hep-ph
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在LHC上测试双Dijet生产中比例因子的比例依赖性

Testing the Scale Dependence of the Scale Factor in Double Dijet Production at the LHC

Svend Domdey, Hans-Jurgen Pirner, Urs Achim Wiedemann

摘要:

标度因子是描述高能强子碰撞中双喷注产生率的有效截面。它对强子射弹中的两部分子分布很敏感。原则上,比例因子取决于质心能量和对双双射流截面有贡献的射流的最小横向能量。在这里,我们指出,质子-质子碰撞在大型强子对撞机将提供第一次实验访问这些规模的依赖性在一个gramically宽,名义上微扰运动学范围内的最小横向能量在10 GeV和100 GeV之间。这限制了两个部分子分布函数在碰撞参量空间中对部分子动量分数和部分子局域化的依赖性。在半硬比约肯x(0.001 < x < 0.1)和高分辨率Q ^[2]范围内,关于强子分布函数的横向增长的新信息是值得期待的。我们讨论在何种程度上可以解开不同的图片的$x$ -演化的两部分子分布在横向平面上测量双硬散射事件在大型强子对撞机。

英文摘要:

The scale factor is the effective cross section used to characterize the measured rate of inclusive double dijet production in high energy hadron collisions. It is sensitive to the two-parton distributions in the hadronic projectile. In principle, the scale factor depends on the center of mass energy and on the minimal transverse energy of the jets contributing to the double dijet cross section. Here, we point out that proton-proton collisions at the LHC will provide for the first time experimental access to these scale dependences in a logarithmically wide, nominally perturbative kinematic range of minimal transverse energy between 10 GeV and 100 GeV. This constrains the dependence of two-parton distribution functions on parton momentum fractions and parton localization in impact parameter space. Novel information is to be expected about the transverse growth of hadronic distribution functions in the range of semi-hard Bjorken x (0.001 < x < 0.1) and high resolution Q^2. We discuss to what extent one can disentangle different pictures of the $x$-evolution of two-parton distributions in the transverse plane by measuring double-hard scattering events at the LHC.

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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