Update README.md

add citation to arxiv

README.md

@@ -108,8 +108,22 @@ Below is an example from the `question_answers` dataset:
 - **ground_truths_contexts**: Foundation models built by IBM \n\nIn IBM watsonx.ai, ...
 
 ---
-
-
+## Citation
+
+If you decide to use this dataset, please consider citing our preprint
+
+```bibtex
+@misc{orbach2025analysishyperparameteroptimizationmethods,
+      title={An Analysis of Hyper-Parameter Optimization Methods for Retrieval Augmented Generation}, 
+      author={Matan Orbach and Ohad Eytan and Benjamin Sznajder and Ariel Gera and Odellia Boni and Yoav Kantor and Gal Bloch and Omri Levy and Hadas Abraham and Nitzan Barzilay and Eyal Shnarch and Michael E. Factor and Shila Ofek-Koifman and Paula Ta-Shma and Assaf Toledo},
+      year={2025},
+      eprint={2505.03452},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2505.03452}, 
+}
+```
+---
 ## Contact
 
 For questions or feedback, please: