C. N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, New York 11794, USA.
Phys Rev Lett. 2012 Jul 20;109(3):031801. doi: 10.1103/PhysRevLett.109.031801. Epub 2012 Jul 17.
New physics that exhibits irregular tracks such as kinks, intermittent hits, or decay in flight may easily be missed at hadron colliders. We demonstrate this by studying viable models of light, O(10 GeV), colored particles that decay predominantly inside the tracker. Such particles can be produced at staggering rates, and yet, may not be identified or triggered on at the LHC, unless specifically searched for. In addition, the models we study provide an explanation for the original measurement of the anomalous charged track distribution by CDF. The presence of irregular tracks in these models reconcile that measurement with the subsequent reanalysis and the null results of ATLAS and CMS. Our study clearly illustrates the need for a comprehensive study of irregular tracks at the LHC.
新物理表现出不规则的轨迹，如扭结、间歇性命中或在飞行中衰减，这些很容易在强子对撞机中被忽略。我们通过研究可行的轻、O(10 GeV)色粒子模型来证明这一点，这些粒子主要在轨道内衰减。这些粒子的产生率可能非常高，但除非专门搜索，否则在 LHC 上可能无法识别或触发。此外，我们研究的模型为 CDF 对异常带电轨迹分布的原始测量提供了一种解释。这些模型中的不规则轨迹的存在使该测量结果与随后的重新分析以及 ATLAS 和 CMS 的零结果相一致。我们的研究清楚地表明，需要在 LHC 上对不规则轨迹进行全面研究。
