FACTUM: Mechanistic Detection of Citation Hallucination in Long-Form RAG.

@inproceedings{dassen-2026-factum, author = {Maxime Dassen and Rebecca Kotula and Kenton Murray and Andrew Yates and Dawn J. Lawrie and Efsun Selin Kayi and James Mayfield and Kevin Duh}, editor = {Ricardo Campos and Adam Jatowt and Yanyan Lan and Mohammad Aliannejadi and Christine Bauer and Sean MacAvaney and Avishek Anand and Zhaochun Ren and Suzan Verberne and Nan Bai and Masoud Mansoury}, title = {{FACTUM: Mechanistic Detection of Citation Hallucination in Long-Form RAG}}, booktitle = {{Advances in Information Retrieval - 48th European Conference on Information Retrieval, ECIR 2026, Delft, The Netherlands, March 29 - April 2, 2026, Proceedings, Part I}}, series = {Lecture Notes in Computer Science}, volume = {16483}, pages = {272--288}, publisher = {Springer}, year = {2026}, url = {https://doi.org/10.1007/978-3-032-21289-4_18}, doi = {https://doi.org/10.1007/978-3-032-21289-4_18} }