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arXiv 1104.0326hep-ex
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用ATLAS探测器测量sqrt{s}=7 TeV处的非弹性质子-质子截面

Measurement of the Inelastic Proton-Proton Cross-Section at sqrt{s}=7 TeV with the ATLAS Detector

The ATLAS Collaboration

摘要:

首次测量了质子-质子碰撞的非弹性截面,能量为质心sqrt{s}=7 TeV,使用ATLAS探测器在大型强子对撞机。在对应于20 μ b-1的积分亮度的数据集中,通过要求在安装在探测器的前向区域中的闪烁计数器上的命中来选择事件。当xi > 5 × 10 ^-6时,测得的非弹性截面为60.3 +/- 2.1 mb,其中xi=M_X^2/s是根据强子的不变质量M_X计算出来的,强子的不变质量是用事件中最大的快度间隙来选择的。对于衍射事件,这对应于要求至少一个解离质量大于15.7 GeV。

英文摘要:

A first measurement of the inelastic cross-section is presented for proton-proton collisions at a center of mass energy sqrt{s}=7 TeV using the ATLAS detector at the Large Hadron Collider. In a dataset corresponding to an integrated luminosity of 20 mub-1, events are selected by requiring hits on scintillation counters mounted in the forward region of the detector. An inelastic cross-section of $60.3 +/- 2.1 mb is measured for xi > 5x10^-6, where xi=M_X^2/s is calculated from the invariant mass, M_X, of hadrons selected using the largest rapidity gap in the event. For diffractive events this corresponds to requiring at least one of the dissociation masses to be larger than 15.7 GeV.

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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