Joint Institute for Nuclear Research, Dubna, Russia.
Phys Rev Lett. 2010 Nov 26;105(22):221802. doi: 10.1103/PhysRevLett.105.221802. Epub 2010 Nov 24.
We report a search for diphoton events with large missing transverse energy produced in pp collisions at √s=1.96 TeV. The data were collected with the D0 detector at the Fermilab Tevatron Collider and correspond to 6.3 fb(-1) of integrated luminosity. The observed missing transverse energy distribution is well described by the standard model prediction, and 95% C.L. limits are derived on two realizations of theories beyond the standard model. In a gauge-mediated supersymmetry breaking scenario, the breaking scale Λ is excluded for Λ<124 TeV. In a universal extra dimension model including gravitational decays, the compactification radius R(c) is excluded for R(c)(-1)<477 GeV.
我们报告了在 √s=1.96 TeV 的 pp 对撞中，利用 D0 探测器在费米实验室 Tevatron 对撞机上收集的 6.3 fb(-1)的积分亮度数据，寻找具有大横向能量缺失的双光子事件。标准模型预测很好地描述了观测到的横向能量缺失分布，并且在两个超出标准模型的理论实现中推导出了 95%置信度限制。在规范介导的超对称破缺情景中，排除了Λ<124 TeV 的破缺标度Λ。在包含引力衰变的普遍额外维度模型中，排除了 R(c)(-1)<477 GeV 的紧致化半径 R(c)。
