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arXiv 1409.3704hep-exnucl-ex
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用ATLAS探测器测量在sqrt(s)=7 TeV处弹性散射的LHC的总截面

Measurement of the total cross section at the LHC at sqrt(s)=7 TeV from elastic scattering with the ATLAS detector

Hasko Stenzel

摘要:

在这方面的贡献测量的总$pp$截面与ATLAS探测器在LHC在sqrt(s)=7 TeV。在一个特殊的运行与高β *,束流光学,微分弹性截面测量作为曼德尔动量传递变量t的函数。使用ATLAS的ALFA子探测器进行测量。使用对|t|范围从0.01 GeV^2至0.1 GeV^2中的微分弹性截面的拟合以外推至|t| --> 0,通过光学定理测量的总截面sigmatot(pp--> X)为:sigmatot(pp--> X)= 95.35 +/- 0.38 \(stat.)+/- 1.25(实验)+/- 0.37(拉伸)mb,其中第一个误差是统计误差,第二个误差考虑了所有实验系统的不确定性,最后一个误差与外推到|t| --> 0的不确定性有关。此外,在小|t|处的弹性截面的斜率被确定为B = 19.73 +/- 0.14(统计)。+/- 0.26(系统)GeV^-2。

英文摘要:

In this contribution a measurement of the total $pp$ cross section with the ATLAS detector at the LHC at sqrt(s)=7 TeV is presented. In a special run with high-beta*, beam optics, the differential elastic cross section is measured as a function of the Mandelstam momentum transfer variable t. The measurement is performed with the ALFA sub-detector of ATLAS. Using a fit to the differential elastic cross section in the |t| range from 0.01 GeV^2 to 0.1 GeV^2 to extrapolate to |t|--> 0, the total cross section, sigmatot(pp--> X), is measured via the optical theorem to be: sigmatot(pp--> X) = 95.35 +/- 0.38 \; (stat.) +/- 1.25 (exp.) +/- 0.37 (extr.) mb, where the first error is statistical, the second accounts for all experimental systematic uncertainties and the last is related to uncertainties in the extrapolation to |t| --> 0. In addition, the slope of the elastic cross section at small |t| is determined to be B = 19.73 +/- 0.14 (stat.) +/- 0.26 (syst.) GeV^-2.

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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