Gravitational waves from dark first order phase transitions and dark photons

主讲人 (Speaker): 
Antonino Marciano
主讲人单位 (Speaker's Institute): 
邀请人 (Invited by): 
黄志琦 (Zhiqi Huang)
时间 (Time): 
星期三, 2017/06/07 - 10:30 to 11:30
地点 (Location): 
摘要 (Abstract): 

Cold Dark Matter particles may interact with ordinary particles through a dark photon, which acquires a mass thanks to a spontaneous symmetry breaking mechanism. We discuss a dark photon model in which the scalar singlet associated to the  spontaneous symmetry breaking has an effective potential that induces a first order phase transition in the early Universe. Such a scenario provides a rich phenomenology for electron-positron colliders and gravitational waves interferometers, and may be tested in several different channels. The hidden first order phase transition implies the emission of gravitational waves signals, which may constrain the dark photon's space of parameters. Compared limits from electron-positron colliders, astrophysics, cosmology and future gravitational waves interferometers such as eLISA, U-DECIGO and BBO are discussed. This highly motivates a {\it cross-checking strategy} of data arising from experiments dedicated to gravitational waves, meson factories, the International Linear Collider (ILC), the Circular Electron Positron Collider (CEPC) and other underground direct detection experiments of cold dark matter candidates.


主讲人简介 (Speaker's CV): 
Antonino Marcianò 2008年在罗马大学获得博士学位。先后在法国Marseille理论物理中心,意大利罗马大学,美国Haverford College,美国普林斯顿大学任博士后。2014年开始在复旦大学任青年研究员。Antonino的研究兴趣包括早期宇宙暴涨,暗能量,量子宇宙学,唯象量子引力,已在SCI刊物上发表论文30余篇。