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The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app.

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A bstract: W e consi der Q C D correcti ons to H i ggs boson producti on through gl uon{gl uon fusi on i n hadron col l i si ons. U si ng the recentl y eval uated [ 14] two-l oop am pl i tude for thi s process and the correspondi ng factori zati on form ul ae [ 15,16,17,18] descri bi ng soft-gl uon brem sstrahl ung at O ( 2 S ), we com pute the soft and vi rtualcontri buti onsto the next-to-next-to-l eadi ng ordercrosssecti on. W e al so di scuss soft-gl uon resum m ati on at next-to-next-to-l eadi ng l ogari thm i c accuracy. N um eri cal resul ts for H i ggs boson producti on at the LH C are presented.