I know about the Plancherel measure, but I don't know where the term "Plancherel density" is defined.



What is the definition of Plancherel density?
the Plancherel density is derived from the Plancherel measure, see [arXiv:1812.00047](https://arxiv.org/abs/1812.00047) for the precise definition:


![](https://ilorentz.org/beenakker/MO/plancherel.png)


