Update README.md

README.md

@@ -39,7 +39,7 @@ PathFinder-PRM-7B is a hierarchical discriminative Process Reward Model (PRM) de
 <!-- Provide the basic links for the model. -->
 
 - **Repository:** https://github.com/declare-lab/PathFinder-PRM
-<!-- - **Paper:** [More Information Needed] -->
+- **Paper:** https://arxiv.org/abs/2505.19706
 
 For more details, please refer to our paper and Github repository.