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def definition def or abbrev

zBosonMass

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formal statement (Lean)

  78noncomputable def zBosonMass (g g' v : ℝ) : ℝ := v * Real.sqrt (g^2 + g'^2) / 2

proof body

Definition body.

  79
  80/-- The W/Z mass ratio:
  81    m_W / m_Z = cos θ_W
  82    where θ_W is the Weinberg angle. -/

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