Looking for lights from the darkness: MeV-scale solar ALP signals

by Prof. Yongchao Zhang（张永超） (Southeast University)

Thursday 28 May 2026, 11:00 → 12:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N600 - Lecture Room (Tsung-Dao Lee Institute)

Abstract: 

MeV-scale axion-like particles (ALPs) can be produced abundantly in the Sun. The photons from ALP decay could deviate significantly from the original ALP direction, or even from roughly the opposite direction of the Sun. The nontrivial angular and spectral distributions enable us new methods to detect the lights from the darkness. We consider the space detection and terrestrial experiments at the South Pole. It is found that there is a critical height for the terrestrial searches, below which there is no flux at all for some regions of the parameter space. In the next-generation experiments, we can explore the coupling of ALP to photons up to 10^{−12} GeV^{−1}, surpassing the current supernova limits.

Brief biography:

 Dr. Yongchao Zhang, Professor at Southeast University, got his Ph.D. from Peking University in 2014. He was once a visiting scholar at the University of Maryland and the Institute of Theoretical Physics, CAS, and a postdoc at the Université Libre de Bruxelles and the Washington University in St. Louis. He is mainly interested in beyond standard model phenomenology and relevant astrophysics and cosmology, such as neutrino physics, axi.

Alternative online link: https://meeting.tencent.com/dm/mcEVjP0J4HAS

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