Search for new phenomena in events with a photon and missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector
Search for new phenomena in events with a photon and missing transverse momentum in pp collisions at √s=13 TeV with the ATLAS detector
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DOI：
10.1007/jhep06(2016)059
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发表时间：
2016-06-09
影响因子：
5.4
通讯作者：
Zwalinski, L.
中科院分区：
文献类型：
--
作者：
Aaboud, M.;Aad, G.;Zwalinski, L.
本文报道了在大型强子对撞机上用ATLAS实验寻找高能光子和大失横动量事件中的新现象的结果。这些数据是在质量中心能量为13 TeV的质子-质子碰撞中收集的，对应的积分光度为3.2 fb（-1）。观察到的数据与标准模型的预期一致。排除限制提出了新的现象，包括对生产的暗物质候选人或大额外的空间维度的模型。在暗物质和轴向矢量介质的简化模型中，搜索排除了低于710 GeV的介质质量低于150 GeV的暗物质候选质量。在一个有效的理论的暗物质生产，抑制规模M-* 的值高达570 GeV被排除在外，截断各种耦合值的效果报告。对于ADD大额外的空间维度模型的搜索地方更严格的限制比以前的搜索在相同的事件拓扑结构，不包括M-D高达约2.3（2.8）TeV的两个（六）额外的空间维度的限制减少了20 - 40%，这取决于额外的空间维度的数量时，应用截断程序。
Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the Large Hadron Collider are reported. The data were collected in proton-proton collisions at a centre-of- mass energy of 13TeV and correspond to an integrated luminosity of 3.2 fb(-1). The observed data are in agreement with the Standard Model expectations. Exclusion limits are presented in models of new phenomena including pair production of dark matter candidates or large extra spatial dimensions. In a simplified model of dark matter and an axial-vector mediator, the search excludes mediator masses below 710 GeV for dark matter candidate masses below 150 GeV. In an effective theory of dark matter production, values of the suppression scale M-* up to 570 GeV are excluded and the effect of truncation for various coupling values is reported. For the ADD large extra spatial dimension model the search places more stringent limits than earlier searches in the same event topology, excluding M-D up to about 2.3 (2.8) TeV for two (six) additional spatial dimensions; the limits are reduced by 20 40% depending on the number of additional spatial dimensions when applying a truncation procedure.