From HEPfeickert https://twitter.com/HEPfeickert on Twitter: A reminder that the PDG 2020 is available for pre-order! Physicists, order your updated particle book! We did a lot of good work in the last 2 years, and if for not other reason then having a reminder of that in your backpack go get it. :) # https://pdg.lbl.gov/2020/html/receive_our_products.html https://twitter.com/HEPfeickert/status/1344784216433848323/photo/1 https://chirp.cooleysekula.net/attachment/70047