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def definition def or abbrev

d_2_mass

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formal statement (Lean)

  45def d_2_mass : ℝ := -89 / 432

proof body

Definition body.

  46
  47/-- Matching factor for alpha_s at threshold (NLO accuracy).
  48    Returns alpha_s^(n) given alpha_s^(n+1) at the threshold scale. -/

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