Bai Yang, Han Zhenyu
Theoretical Physics Department, Fermilab, Batavia, Illinois 60510, USA.
Phys Rev Lett. 2009 Jul 31;103(5):051801. doi: 10.1103/PhysRevLett.103.051801. Epub 2009 Jul 27.
A long-range "dark force" has recently been proposed to mediate the dark matter (DM) annihilation. If DM particles are copiously produced at the Large Hadron Collider, the light dark force mediator will also be produced through radiation. We demonstrate how and how precise we can utilize this fact to measure the coupling constant of the dark force. The light mediator's mass is measured for the "lepton jet" to which it decays. In addition, the mass of the DM particle is determined using the m(T2) technique. Knowing these quantities is critical for calculating the DM relic density.
最近有人提出一种长程“暗力”来介导暗物质（DM）的湮灭。如果在大型强子对撞机中大量产生暗物质粒子，那么轻暗力媒介粒子也会通过辐射产生。我们展示了如何以及能够多么精确地利用这一事实来测量暗力的耦合常数。通过测量轻媒介粒子衰变产生的“轻子喷注”来确定其质量。此外，使用m(T2)技术来确定暗物质粒子的质量。了解这些量对于计算暗物质遗迹密度至关重要。
