講座主題：Kaon and hyperon decays shining light on dark photons
主講人： Jusak Tandean
工作單位：臺灣大學
活動時間：2020-9-9(周三) 15：00
講座地點：騰訊會議 281 338 262
主辦單位：煙臺大學光電信息科學技術學院
內容摘要：
If the dark photon exists and is massless, it can affect standard-model particles only via higher-dimensional operators. It would therefore have evaded the recent searches for the massive one based on its renormalizable interactions with ordinary fermions due to gauge kinetic mixing. This talk focuses on the case of massless dark photon and explores the possibility that it has flavor-changing dipole-type couplings to the down and strange quarks. These couplings give rise to the FCNC decays of strange hadrons (i.e. kaons and hyperons) into final states containing missing energy carried away by the dark photon. Interestingly, in the kaon sector there are a few such decays which are allowed by the pertinent constraints to have sizable rates potentially within the reaches of KOTO and NA62. Some of the lightest hyperons can undergo analogous decays with large rates which may be detectable by BESIII. Thus, one or more of these ongoing experiments might soon be able to offer important tests on the existence of massless dark photon.
主講人介紹：
Jusak Tandean is originally from Indonesia and earned his PhD in 1997 from the University of Massachusetts Amherst in the US. Since 2008 he has worked in Taiwan as a researcher, mostly at Taiwan University.
