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arXiv 1205.3142hep-ex
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CMS在sqrt(s)=7 TeV的非弹性质子-质子截面测量

Inelastic proton-proton cross section measurements in CMS at sqrt(s)=7 TeV

Anna Julia Zsigmond

摘要:

我们目前的测量总的非弹性PP截面在7 TeV获得的CMS检测器。使用了两种不同的方法。在低事件堆积的运行中,我们利用大的伪快度覆盖(|η| <5.2)的CMS量热计,以获得具有可接受范围内的任何活度的事件的截面。此外,通过将总可见截面作为参数的泊松分布拟合到重建的主顶点的数量来使用具有高事件堆积的运行。这两个测量都被修正到强子水平定义的非弹性截面。

英文摘要:

We present measurements of the total inelastic pp cross section at 7 TeV obtained with the CMS detector. Two different methods are used. In runs with low event pile-up, we exploit the large pseudorapidity coverage (|η|<5.2) of the CMS calorimeters to obtain the cross section for events with any activity in the acceptance range. In addition, runs with high event pile-up are used by fitting a Poisson distribution with the total visible cross section as parameter to the number of reconstructed primary vertices. Both measurements are corrected to a hadron level definition of the inelastic cross section.

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