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arXiv 1002.4917hep-ex
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TeV =1.96时ppbar碰撞直接光子对产生截面的测量

Measurement of direct photon pair production cross sections in ppbar collisions at sqrt(s)=1.96 TeV

The D0 Collaboration, V. Abazov

摘要:

本文利用费米实验室Tevatron质子-反质子对撞机D 0探测器收集的4.2 fb-1的数据测量了直接光子对产生的截面。我们测量单微分截面作为双光子质量的函数,双光子系统的横向动量,光子之间的方位角,和光子的极散射角,以及双微分截面考虑最后三个运动学变量在三个双光子质量箱。结果与不同的微扰QCD预言和事件发生器进行了比较。

英文摘要:

We present a measurement of direct photon pair production cross sections using 4.2 fb-1 of data collected with the D0 detector at the Fermilab Tevatron proton-antiproton Collider. We measure single differential cross sections as a function of the diphoton mass, the transverse momentum of the diphoton system, the azimuthal angle between the photons, and the polar scattering angle of the photons, as well as the double differential cross sections considering the last three kinematic variables in three diphoton mass bins. The results are compared with different perturbative QCD predictions and event generators.

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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