Agent Q-Mix: Selecting the Right Action for LLM Multi-Agent Systems through Reinforcement Learning. - Eric Hanchen Jiang; Levina Li; Rui Sun 011; Xiao Liang; Yubei Li; Yuchen Wu; Haozheng Luo; Hengli Li; Zhi Zhang 012; Zhaolu Kang; Kai-Wei Chang 001; Ying Nian Wu (CoRR, 2026)