講者：林彥勳
現職：中央研究院物理研究所 博士後研究員
講題：Exploring Light Dark Matter Boosted by Supernova Neutrinos in the Present and Past Universe
時間：5月24日（週五）下午13:20至15:00
地點：科技大樓一樓ST114教室
講題簡介：
In the realm of fundamental physics, the enigmatic nature of dark matter (DM) continues to captivate the minds of researchers worldwide. Recently, light DM, mχ ≲ O(MeV), has gained much attention in both theoretical and experimental aspects due to tight constraints have been set for mχ ≳ O(GeV). Our research advances in understanding the interactions between dark and visible sectors through boosted DM (BDM) by supernova neutrinos (SNν). The proposed novel scenario presents a paradigm shift for directly measuring mχ through time-of-flight information in the sub-MeV region. We further utilize SNν BDM contributions from galaxies that have hosted all SNe from the past to the present-day, forming a diffuse flux that represents a persistent and isotropic flux which parallels the famous diffuse SNν background. This proposed novel scenario offers a unified picture that depicts the elusiveness of DM through innovative methodologies with great advancements which I'll delineate in this talk.
在基礎物理學領域中，暗物質的神秘性一直吸引著全球研究者的注意。近年來，由於對質量較大的暗物質（mχ ≳ O(GeV)）設限嚴格，輕質暗物質（mχ ≲ O(MeV)）在理論和實驗方面都受到了更多關注。我們的研究探索了超新星中微子（SNν）如何激發暗物質（BDM），並提出了一種通過飛行時間信息直接測量亞MeV區域暗物質的新方法。我們進一步利用來自過去和現在所有超新星的SNν BDM貢獻，形成了一個類似於著名的擴散超新星中微子背景的持續且各向同性的通量。
這一新穎的研究場景提供了一個統一的圖景，通過創新的方法描繪暗物質的難以捉摸的特性，將在本次講座中詳細介紹最新進展。
歡迎大家踴躍參加！
