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48th ECIR 2026: Delft, The Netherlands - Part IV
- Ricardo Campos

, Adam Jatowt
, Yanyan Lan
, Mohammad Aliannejadi
, Christine Bauer
, Sean MacAvaney
, Avishek Anand
, Zhaochun Ren
, Suzan Verberne
, Nan Bai
, Masoud Mansoury
:
Advances in Information Retrieval - 48th European Conference on Information Retrieval, ECIR 2026, Delft, The Netherlands, March 29 - April 2, 2026, Proceedings, Part IV. Lecture Notes in Computer Science 16486, Springer 2026, ISBN 978-3-032-21320-4
Tutorial Papers
- Joel Mackenzie

, Sean MacAvaney
, Antonio Mallia
, Michal Siedlaczek
:
Practical, Efficient, In-Memory Inverted Indexes. 3-10 - Chuan Meng

, Fengran Mo
, Mohammad Aliannejadi
, Jeff Dalton
, Jian-Yun Nie
:
Conversational Search: Foundations, Large Language Models, and Agents. 11-18 - Chen Xu

, Clara Rus
, Yuanna Liu
, Marleen de Jonge
, Jun Xu
, Maarten de Rijke
:
Economic Perspectives on Fairness in Information Retrieval. 19-26 - Mohanna Hoveyda, Panagiotis Eustratiadis, Arjen P. de Vries, Maarten de Rijke:

Tutorial on Reasoning for IR & IR for Reasoning. 27-34 - Andrew Yates, Carlos Lassance, Cosimo Rulli, Eugene Yang, Sean MacAvaney, Siddharth A. K. Singh, Thong Nguyen, Yibin Lei:

Neural Lexical Search with Learned Sparse Retrieval. 35-43 - Catherine Chen

, Maria Heuss
, Carsten Eickhoff
:
Tutorial on Mechanistic Interpretability. 44-52 - Maxim Panov, Artem Shelmanov, Roman Vashurin, Artem Vazhentsev, Ekaterina Fadeeva, Lyudmila Rvanova, Timothy Baldwin:

Uncertainty Quantification for Large Language Models. 53-59
Industry Papers
- Bevan Koopman, Hang Li, Shuai Wang

, Guido Zuccon
:
Evalugator[inline-graphic not available: see fulltext] - Rapid, Agile Development and Evaluation of Retrieval Augmented Generation Systems Without Labels. 63-67 - Sofia Bennani, Charles Moslonka

:
A Systematic Analysis of Chunking Strategies for Reliable Question Answering. 68-73 - Shivani Upadhyay

, Messiah Ataey
, Syed Shariyar Murtaza
, Yifan Nie, Anirudh Aggarwal
, Jimmy Lin
:
Understanding Multi-Structured Documents via LLMs'. 74-81 - Suhaib Basir

, Mónica Marrero, Julián Urbano:
Exploring Neural IR in Europeana. 82-88 - Samarth Agrawal

, Jayanth Yetukuri
, Diptesh Kanojia
, Qunzhi Zhou, Zhe Wu
:
Improving Search Suggestions for Alphanumeric Queries. 89-93 - Natalija Glisovic

, Martin Tegner
, Danica Kragic
:
Data Augmentation with LLMs for Cold Start Recommendation in E-Commerce. 94-99 - Chao Gan, Fan Yang, Fangping Huang, Weijie Yuan, Nahid Anwar, Musen Wen, Konstantin Shmakov, Hong Yao, Kuang-chih Lee:

Display Ads Contextual Relevance Modeling with LLM Labels. 100-104 - Olivier Jeunen, Schaun Wheeler:

Behavioural Effects of Agentic Messaging - A Case Study on a Financial Service Application. 105-110 - Tamara Czinczoll

, Dong Liu
, Filippo Betello:
Iterative Reranking as a Compute-Scaling Method for LLM-Based Rankers. 111-117 - Daraksha Parveen, Doug Kang, Anwitha Paruchuri, Deep Kayal, Pavan Mallapragada:

Accelerating Personalization Signal Learning via Synthetic Data. 118-125
Demo Papers
- Lukas Wegmeth

, Moritz Baumgart
, Philipp Meister
, Bela Gipp
, Joeran Beel
:
OmniRec: The All-In-One Solution for Reproducible and Interoperable Recommender Systems Experimentation. 129-135 - Ornella Irrera

, Marco Martinelli, Samuel Piron
, Gianmaria Silvello
:
GutBrainKB: Exploring the Gut-Brain Interaction Through a Reliable Biomedical KB. 136-141 - Trung Vo

, An Trieu
, Vu Tran
, Yuji Matsumoto
, Le-Minh Nguyen
:
CancerRAGent: Evidence-Linked and Safety-Guided Oncology Question Answering. 142-147 - Wojciech Kusa

, Niklas Deckers
, Maik Fröbe
, Laura Dietz
, Birte Platow, Mark Sanderson
:
Talmud-IR: A Talmud-Inspired Interface for Discussing RAG Response Quality. 148-153 - Quang Hieu Vu, Behnaz Nojavanasghari, Frank Yang, Andrew Rabinovich:

Enhancing Job Search Effectiveness with LLM-Powered Context-Aware Query Reformulation. 154-158 - Emmanouil Georgios Lionis

, Craig Macdonald
, Sean MacAvaney
:
Pipeline Inspection, Visualization, and Interoperability in PyTerrier. 159-165 - Rodrigo Duarte

, Rodrigo Silva, António Branco, Hugo Proença, Ricardo Campos
:
ImageSeek: A Hybrid Text-to-Image Image Retrieval System for Domain-Specific Collections. 166-171 - Markos Dimitsas

, Jochen L. Leidner
:
LectureChat: Hybrid RAG over Wikipedia and Multilingual Lecture Videos. 172-178 - Gregor Donabauer, Samy Ateia, Udo Kruschwitz, Maximilian Burger, Matthias May, Christian Gilfrich, Maximilian Haas, Julio Ruben Rodas Garzaro, Christoph Eckl:

MedNuggetizer: Confidence-Based Information Nugget Extraction from Medical Documents. 179-186 - Andrew Parry

, Debasis Ganguly
, Sean MacAvaney
:
[inline-graphic not available: see fulltext] SuiteEval: Simplifying Retrieval Benchmarks. 187-192 - Rodrigo Silva, José Pedro Evans

, José Isidro, Miguel Marques, Afonso Fonseca, Ricardo Morais
, João Canavilhas
, Arian Pasquali
, Purificação Silvano
, Alípio Jorge
, Nuno Guimarães
, Sérgio Nunes
, Ricardo Campos:
CitiLink: Enhancing Municipal Transparency and Citizen Engagement Through Searchable Meeting Minutes. 193-199 - Rishiraj Saha Roy

, Chris Hinze
, Luzian Hahn
, Fabian Küch:
Context Engineering for Agentic Data Science. 200-205 - Alexander Nussbaumer

, Michael Dinzinger
, Sebastian Heineking
, Gijs Hendriksen
, Felix Holz, Saber Zerhoudi
, Martin Potthast
, Michael Granitzer
:
Creating Specialized RAG-Based Search Engines Using the Open Web Index. 206-211
CLEF Overview Papers
- Liana Ermakova

, Hosein Azarbonyad
, Jan Bakker, Gautam Kishore Shahi
, Benjamin Vendeville
, Jaap Kamps
:
CLEF 2026 SimpleText Track - Simplify Scientific Text (and Nothing More). 215-224 - Janek Bevendorff, Maik Fröbe, André Greiner-Petter, Andreas Jakoby, Maximilian Mayerl, Preslav Nakov, Henry Plutz, Martin Potthast, Benno Stein, Minh Ngoc Ta, Yuxia Wang, Eva Zangerle:

Overview of PAN 2026: Voight-Kampff Generative AI Detection, Text Watermarking, Multi-author Writing Style Analysis, Generative Plagiarism Detection, and Reasoning Trajectory Detection. 225-232 - Anxo Pérez

, Javier Parapar
, Xi Wang
, Fabio Crestani
:
eRisk 2026: Tasks on Symptoms Ranking, Contextual and Conversational Approaches for Early Mental Health Detection. 233-241 - Liana Ermakova

, Igor Kuzmin
, Poojan Vachharajani
, Tristan Miller
, Anne-Gwenn Bosser
, Jaap Kamps
:
CLEF 2026 JOKER Track - Humour Detection, Search, and Translation. 242-250 - Luis Gascó

, Hermenegildo Fabregat, Laura García-Sardiña, Paula Estrella, Casimiro Pio Carrino, Daniel Deniz, Álvaro Rodrigo, Rabih Zbib:
TalentCLEF at CLEF2026: Skill and Job Title Intelligence for Human Capital Management. 251-258 - Jussi Karlgren

, Maria Barrett, Ondrej Bojar, Marie Isabel Engels, Diandra Fabre, Lorraine Goeuriot, Josiane Mothe, Philippe Mulhem, Mario Piacentini, Luis Francisco Vargas Madriz, Didier Schwab, Pavel Sindelár, George Stampoulidis, Katherina Thomas, Markarit Vartampetian:
ELOQUENT Lab at CLEF 2026: Evaluation of Generative Language Model Quality. 259-266 - Zhuohan Xie, Rania Elbadry, Fan Zhang, Georgi Georgiev

, Xueqing Peng, Lingfei Qian, Jimin Huang
, Dimitar Dimitrov
, Vanshikaa Jani, Yuyang Dai
, Jiahui Geng
, Yuxia Wang
, Ivan Koychev
, Veselin Stoyanov, Preslav Nakov
:
The CLEF-2026 FinMMEval Lab: Multilingual and Multimodal Evaluation of Financial AI Systems. 267-276 - Johannes Kiesel

, Marc Feger
, Tim Hagen
, Sebastian Heineking
, Maximilian Heinrich
, Maik Fröbe
, Katarina Boland, Wilhelm Pertsch, Julia Romberg
, Ines Zelch
, Stefan Dietze, Matthias Hagen
, Martin Potthast
, Benno Stein
:
Overview of Touché 2026: Argumentation Systems - Extended Abstract. 277-286 - Alexis Joly

, Lukás Picek
, Stefan Kahl
, Hervé Goëau
, Lukás Adam
, Robert Bossy
, Kostas Papafitsoros
, Vojtech Cermák
, Holger Klinck
, Willem-Pier Vellinga
, Robert Planqué
, Tom Denton
, Laura Chrobak, Kevin Barnard
, Claire Nédellec
, Louise Deléger, Marine Courtin
, Giulio Martellucci, Fabrice Vinatier
, Pierre Bonnet
:
LifeCLEF 2026 Teaser: AI Challenges for Biodiversity Understanding and Ecosystem Management. 287-296 - Laura Plaza, Jorge Carrillo-de-Albornoz, Elena Gomis-Vicent, Iván Árcos, María Aloy-Mayo, Paolo Rosso, Damiano Spina:

EXIST 2026: Physiological Data for Multimodal Sexism Characterization in Social Media. 297-305 - Andrea Pasin, Maurizio Ferrari Dacrema

, Paolo Cremonesi, Washington Cunha
, Marcos André Gonçalves, Nicola Ferro:
QuantumCLEF 2026 The Third Edition of the Quantum Computing Lab at CLEF. 306-314 - Anastasios Nentidis, Georgios Katsimpras, Anastasia Krithara, Martin Krallinger, Miguel Rodríguez-Ortega, Eduard Rodriguez-López, Natalia V. Loukachevitch, Igor Rozhkov, Elena Tutubalina, Grigorios Tsoumakas, George Giannakoulas, Dimitris Dimitriadis, Alexandra Bekiaridou, Athanasios Samaras, Vasiliki Patsiou, Giorgio Maria Di Nunzio, Nicola Ferro, Stefano Marchesin, Marco Martinelli, Gianmaria Silvello

, Georgios Paliouras:
BioASQ at CLEF2026: The Fourteenth Edition of the Large-Scale Biomedical Semantic Indexing and Question Answering Challenge. 315-324 - Julia Maria Struß

, Sebastian Schellhammer
, Stefan Dietze
, Venktesh V.
, Vinay Setty
, Tanmoy Chakraborty
, Preslav Nakov
, Avishek Anand
, Primakov Chungkham
, Salim Hafid
, Dhruv Sahnan
, Konstantin Todorov
:
The CLEF-2026 CheckThat! Lab: Advancing Multilingual Fact-Checking. 325-335 - Bogdan Ionescu, Henning Müller, Dan-Cristian Stanciu, Ahmedkhan Radzhabov, Alba García Seco de Herrera, Alexandra-Georgiana Andrei, Alexandra Baicoianu, Ana Neacsu, Andrea M. Storås, Asma Ben Abacha, Benjamin Bracke, Lea Reinartz, Benjamin Lecouteux, Christoph M. Friedrich

, Cynthia Sabrina Schmidt, Corneliu Florea, Diandra Fabre, Didier Schwab, Dimitar Dimitrov, Emmanuelle Esperança-Rodier, Mihai Gabriel Constantin, Hendrik Damm, Henning Schäfer, Ivan Koychev, Josiane Mothe, Liviu-Daniel Stefan, Maja J. Hjuler, Mehmet Kurt, Meliha Yetisgen, Michael A. Riegler, Mihai Dogariu, Mihai Ivanovici, Ming Shan Hee, Mohammad El Sakka, Momina Ahsan, Obioma Pelka, Pål Halvorsen, Preslav Nakov, Raphael Brüngel, Sarfraz Ahmad
, Steven Alexander Hicks, Sushant Gautam
, Tabea Margareta Grace Pakull, Bahadir Eryilmaz, Vajira Thambawita, Vassili Kovalev, Wen-Wai Yim, Yuri Prokopchuk, Zhuohan Xie:
ImageCLEF 2026: Multimodal Challenges in Medicine, Science, Agritech, and Security. 336-344 - Timo Breuer

, Matteo Cancellieri
, Alaa El-Ebshihy
, Maik Fröbe
, Petra Galuscáková
, Lorraine Goeuriot
, Gabriel Iturra-Bocaz
, Jüri Keller
, Petr Knoth
, Andreas Konstantin Kruff
, Philippe Mulhem
, Florina Piroi
, David Pride
, Philipp Schaer
, Didier Schwab
:
Evaluating Information Retrieval Models Along Time: The LongEval Lab at CLEF 2026. 345-353 - Juri Opitz, Corina Julia Raclé, Emanuela Boros, Andrianos Michail, Matteo Romanello, Maud Ehrmann, Simon Clematide:

CLEF HIPE-2026: Evaluating Accurate and Efficient Person-Place Relation Extraction from Multilingual Historical Texts. 354-363
Resource Papers
- Hideaki Joko

, Shakiba Amirshahi
, Charles L. A. Clarke
, Faegheh Hasibi
:
WildClaims: Conversational Information Access in the Wild(Chat). 367-382 - Laura Caspari

, Michael Dinzinger
, Kanishka Ghosh Dastidar
, Christofer Fellicious
, Jelena Mitrovic
, Michael Granitzer
:
CoRECT: A Framework for Evaluating Embedding Compression Techniques at Scale. 383-398 - Marjan Azimi

, Alistair Moffat
, Justin Zobel
:
FaE: A Resource of Logs, Profiles, and Rankings for Academic Expert Finding. 399-414 - Ariel Smith

, David Contreras
, Maria Salamó
, Ludovico Boratto
:
GREAT: A Group Recommendation Evaluation and Analysis Tool. 415-431 - Mariam Arustashvili

, Krisztian Balog
:
SciNUP: Natural Language User Interest Profiles for Scientific Literature Recommendation. 432-446 - Ludovico Boratto

, Gianni Fenu
, Mirko Marras
, Giacomo Medda
, Giovanni Zedda
:
FoodNexus: Massive Food Knowledge for Recommender Systems. 447-462 - Rodrigo Duarte

, António Branco, Hugo Proença, Ricardo Campos
:
pt-image-ir-dataset: An Image Retrieval Dataset in European Portuguese. 463-478 - Jana Isabelle Friese

, Andreas Konstantin Kruff
, Philipp Schaer
, Norbert Fuhr
, Nicola Ferro
:
LISP - A Rich Interaction Dataset and Loggable Interactive Search Platform. 479-495 - Nolwenn Bernard

, Krisztian Balog
:
UserSimCRS v2: Simulation-Based Evaluation for Conversational Recommender Systems. 496-510 - Ricardo Campos

, Ana Filipa Pacheco
, Ana Luísa Fernandes
, Inês Cantante
, Rute Rebouças, Luís Filipe Cunha
, José Isidro, José Pedro Evans
, Miguel Marques, Rodrigo Batista, Evelin Amorim
, Alípio Jorge, Nuno Guimarães
, Sérgio Nunes
, Antonio Leal
, Purificação Silvano:
CitiLink-Minutes: A Multilayer Annotated Dataset of Municipal Meeting Minutes. 511-527 - Maik Fröbe

, Ferdinand Schlatt
, Cosimo Rulli
, Tim Hagen
, Jan Heinrich Merker
, Gijs Hendriksen
, Carlos Lassance
, Franco Maria Nardini
, Rossano Venturini
, Martin Potthast
:
Evaluating the Efficiency and Effectiveness of Learned Sparse Retrieval with the lsr_benchmark. 528-543 - Ricardo Campos

, Raquel Sequeira
, Sara Nerea, Inês Cantante
, Diogo Folques, Luís Filipe Cunha
, João Canavilhas
, António Branco, Alípio Jorge
, Sérgio Nunes
, Nuno Guimarães
, Purificação Silvano:
ClaimPT: A Portuguese Dataset of Annotated Claims in News Articles. 544-560 - Jan Heinrich Merker

, Simon Ruth, Harrisen Scells
, Martin Potthast
:
An Open SERP Mining Infrastructure for the Archive Query Log. 561-577 - Eugene Yang

, Andrew Yates
, Dawn J. Lawrie
, James Mayfield
, Trevor Adriaanse
:
RoutIR: Fast Serving of Retrieval Pipelines for Retrieval-Augmented Generation. 578-593 - Andreas Konstantin Kruff, Christin Katharina Kreutz, Timo Breuer, Philipp Schaer, Krisztian Balog:

Sim4IA-Bench: A User Simulation Benchmark Suite for Next Query and Utterance Prediction. 594-609 - Richard A. A. Jonker

, Bárbara Maria Ribeiro de Abreu Martins, Sérgio Matos
:
BioGraphletQA: Knowledge-Anchored Generation of Complex QA Datasets. 610-625 - Saber Zerhoudi

, Michael Granitzer:
Beyond the Click: A Framework for Inferring Cognitive Traces in Search. 626-640

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