Gluon spin and physical helicity

ID: qcd.gluon.on_shell_helicity_boundary

The gluon is classified as spin one, while a physical on-shell massless gluon has helicities plus or minus one.

Status: canonical_reference

Uncertainty

• This canonical_reference badge is a theory locator; its claim still needs independent, claim-specific validation.

Sources

• https://pdg.lbl.gov/2024/reviews/rpp2024-rev-qcd.pdf

Claim boundaries

• This badge locates a theory claim; it does not validate a physical effect or engineering application.

Diagnostic context only. Cite independent evidence for claims about the world.