'+ h.c.' is used in mathematical or physics notation to indicate additional terms that are the Hermitian conjugates of all preceding terms.
Notes on verification
Confirmed by multiple independent physics sources (education forums, CERN-affiliated blog, arXiv paper) all consistent with standard notation convention in physics. [tier=gold indep_score=0.867 clusters=3 claim_tier=everyday]
Sources
- + h.c. (wikipedia)
- https://www.quantumdiaries.org/2011/06/26/cern-mug-summarizes-standard-model-but-is-off-by-a-factor-of-2/ (corroboration)
- https://www.physicsforums.com/threads/meaning-of-h-c-in-lagrangians-elsewhere.454071/ (corroboration)
- https://arxiv.org/pdf/1612.06184 (corroboration)