2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40201Electromagnetic masses of neutral $K^*(892)$ may be larger than one of charged $K^*(892)$. It is unusual and is called $K^*$-EM-mass anomaly. We review the studies on this issue, and point out that $K^*$-mass splitting can be measured in BES accurately.tex file, 4 pages, no figuresHigh Energy Physics - Phenomenologytext