Measurement of the total cross section from elastic scattering in pp collisions at √s=7 TeV with the ATLAS detector
Measurement of the total cross section from elastic scattering in pp collisions at √s=7 TeV with the ATLAS detector
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DOI：
10.1016/j.nuclphysb.2014.10.019
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发表时间：
2014-12-01
影响因子：
2.8
通讯作者：
Zwalinski, L.
中科院分区：
文献类型：
--
作者：
Aad, G.;Abbott, B.;Zwalinski, L.
测量总pp截面在LHC在根s = 7 TeV。在一个特殊的运行与高β * 光束光学，80 μ B（-1）的积分光度积累，以测量微分弹性截面作为曼德尔动量转移变量t的函数。使用ATLAS的ALFA子探测器进行测量。使用对垂直棒t垂直棒中的微分弹性截面的拟合，从0.01 GeV 2到0.1 GeV 2的范围外推到垂直棒t垂直棒-> 0，通过光学定理测量总截面，sigma（tot）（pp -> X）为：sigma（tot）（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性的，第二个误差考虑了所有实验系统不确定性，最后一个误差与外推到垂直条t垂直条--> 0的不确定性有关。此外，还确定了小竖杆t竖杆处弹性截面的斜率为B = 19.73 +/- 0.14（stat.）+/- 0.26（系统）GeV-2。(C)2014作者由爱思唯尔公司出版
A measurement of the total pp cross section at the LHC at root s = 7 TeV is presented. In a special run with high-beta* beam optics, an integrated luminosity of 80 mu b(-1) was accumulated in order to measure the differential elastic cross section 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 vertical bar t vertical bar range from 0.01 GeV2 to 0.1 GeV2 to extrapolate to vertical bar t vertical bar --> 0, the total cross section, sigma(tot)(pp --> X), is measured via the optical theorem to be:sigma(tot)(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 vertical bar t vertical bar --> 0. In addition, the slope of the elastic cross section at small vertical bar t vertical bar is determined to be B = 19.73 +/- 0.14 (stat.) +/- 0.26 (syst.) GeV-2. (C) 2014 The Authors. Published by Elsevier B.V.