Balkin Reuven, Perez Gilad, Weiler Andreas
1First Physik-Department, Technische Universität München, 85748 Garching, Germany.
2Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 7610001 Israel.
Eur Phys J C Part Fields. 2018;78(2):104. doi: 10.1140/epjc/s10052-018-5552-3. Epub 2018 Feb 5.
We examine the dark matter phenomenology of a composite electroweak singlet state. This singlet belongs to the Goldstone sector of a well-motivated extension of the Littlest Higgs with -parity. A viable parameter space, consistent with the observed dark matter relic abundance as well as with the various collider, electroweak precision and dark matter direct detection experimental constraints is found for this scenario. -parity implies a rich LHC phenomenology, which forms an interesting interplay between conventional natural SUSY type of signals involving third generation quarks and missing energy, from stop-like particle production and decay, and composite Higgs type of signals involving third generation quarks associated with Higgs and electroweak gauge boson, from vector-like top-partners production and decay. The composite features of the dark matter phenomenology allows the composite singlet to produce the correct relic abundance while interacting weakly with the Higgs via the usual Higgs portal coupling [Formula: see text], thus evading direct detection.
我们研究了一种复合电弱单态的暗物质现象学。这个单态属于具有宇称的最简希格斯模型合理扩展的戈德斯通部分。对于这种情形，我们找到了一个可行的参数空间，它与观测到的暗物质遗迹丰度以及各种对撞机、电弱精确测量和暗物质直接探测实验约束相一致。宇称意味着大型强子对撞机有丰富的现象学，这在涉及第三代夸克和缺失能量的传统自然超对称类型信号（源于类顶夸克粒子的产生和衰变）与涉及与希格斯玻色子和电弱规范玻色子相关的第三代夸克的复合希格斯类型信号（源于类矢量顶伙伴的产生和衰变）之间形成了有趣的相互作用。暗物质现象学的复合特征使得复合单态在通过通常的希格斯门户耦合[公式：见原文]与希格斯玻色子弱相互作用的同时产生正确的遗迹丰度，从而避开直接探测。
