# The Giant Pairing Vibration in Heavy Nuclei: Present Status and Future Studies

## TL;DR

This paper reviews the theoretical background, experimental efforts, and future prospects for detecting the Giant Pairing Vibration in heavy nuclei, highlighting recent evidence in light nuclei and challenges in heavier systems.

## Contribution

It provides a comprehensive review of the current status and future directions for observing the Giant Pairing Vibration in heavy nuclei, including new experimental approaches.

## Key findings

- Evidence for the mode in $^{14,15}$C nuclei
- Challenges in identifying the mode in Sn and Pb nuclei
- Potential of weakly-bound projectiles to overcome reaction limitations

## Abstract

The Giant Pairing Vibration, a two-nucleon collective mode originating from the second shell above the Fermi surface, has long been predicted and expected to be strongly populated in two-nucleon transfer reactions with cross sections similar to those of the normal Pairing Vibration. Recent experiments have provided evidence for this mode in $^{14,15}$C but, despite sensitive studies, it has not been definitively identified either in Sn or Pb nuclei where pairing correlations are known to play a crucial role near their ground states. In this paper we review the basic theoretical concepts of this "elusive" state and the status of experimental searches in heavy nuclei. We discuss the hindrance effects due to Q-value mismatch and the use of weakly-bound projectiles as a way to overcome the limitations of the (p,t) and (t,p) reactions. We also discuss the role of the continuum and conclude with some possible future developments.