After many months of work, the white paper of the LHC Long-Lived Particle Community appeared on the arXiv on 11 March 2019...

https://arxiv.org/abs/1903.04497

https://inspirehep.net/record/1724682

...and was published in the Journal of Physics G in September of 2020:

J. Phys. G: Nucl. Part. Phys. 47 090501

It received more than 100 citations in the first year of being public and has been cited >320 times as of this writing (August 2023).

Here's what we wrote about it at the time of publication:

We’re pleased to have reached this milestone.  It's a comprehensive document -- a combination review paper, set of recommendations, accounting of open discovery possibilities, record of accumulated knowledge, and speculation for the future -- that serves as the definitive guide to LLP searches at the LHC.  We congratulate everyone for their contributions and we’re especially grateful for the persistence of the chapter editors.

The entire document is the result of the joint work of everyone who has participated in our workshops and conversations and brainstorming sessions over the past several years, and we're very much looking forward to the future of LLP searches at the LHC.