顶夸克作为弦共振的窗口
Top Quarks as a Window to String Resonances
摘要：
我们研究了在大型强子对撞机上发现衰变到$t\bar{t}$末态的弦共振的可能性。我们指出，顶夸克对产生是研究这种共振的一个有前途和有利的渠道，因为它们的低标准模型背景和独特的运动学。我们研究了通过弦共振交换的顶对产生截面的不变质量分布和角度依赖性。这些共振的质量比和不寻常的角分布可能有助于确定它们的基本性质，并将它们与其他新物理区分开来。我们发现，弦共振低于4 TeV的弦尺度可以检测到通过$t\bar{t}$通道，无论是从重建的$t\bar{t}$半轻子衰变或最近的技术，在确定高度提升顶部。
英文摘要：
We study the discovery potential of string resonances decaying to $t\bar{t}$ final state at the LHC. We point out that top quark pair production is a promising and an advantageous channel for studying such resonances, due to their low Standard Model background and unique kinematics. We study the invariant mass distribution and angular dependence of the top pair production cross section via exchanges of string resonances. The mass ratios of these resonances and the unusual angular distribution may help identify their fundamental properties and distinguish them from other new physics. We find that string resonances for a string scale below 4 TeV can be detected via the $t\bar{t}$ channel, either from reconstructing the $t\bar{t}$ semi-leptonic decay or recent techniques in identifying highly boosted tops.
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