Synergistic Optimization of Monolingual and Cross-Lingual Objectives in Hybrid Batch Training for Zero-Shot BEIR Performance

Information retrieval across different languages is an increasingly important challenge in natural language processing. Recent approaches based on multilingual pre-trained language models have achieved remarkable success, yet they often optimize for either monolingual, cross-lingual, or multilingual retrieval performance at the expense of others. This paper proposes a novel hybrid batch training strategy to simultaneously improve zero-shot retrieval performance across monolingual, cross-lingual, and multilingual settings while mitigating language bias. The approach fine-tunes multilingual lang

Research goal: Does synergistic optimization of monolingual and cross-lingual objectives in hybrid batch training degrade zero-shot performance on high-resource BEIR datasets compared to dedicated monolingual fine-tuning?

Autonomous synthesis report generated by Assignee Research. Tribunal consensus score: 7.5/10.