The ACM SIGIR International Conference on the Theory of Information Retrieval (ICTIR) is the premier conference of theoretical information retrieval (IR). General information about ICTIR is provided here.
The conference welcomes papers on core IR and any paper on connections between IR and its neighboring disciplines. ICTIR explicitly welcomes experimental and industrial papers that validate approaches from the lens of practical applicability. Such papers should, apart from validating the practical applicability of an existing approach, provide a clear message to the community as to which aspects need further (theoretical) investigation, based on the experimental findings. ICTIR also encourages papers attempting to define new tasks or apply fundamentally different ideas to information retrieval tasks.