Fix Chew-Mandelstam

Co-authored-by: Remco de Boer <[email protected]>
ComPWA · Mar 4, 2024 · f49769b · f49769b
1 parent 613ae22
commit f49769b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/ampform/dynamics/phasespace.py b/src/ampform/dynamics/phasespace.py
@@ -210,7 +210,7 @@ def chew_mandelstam_s_wave(s, m1, m2):
     right_term = (m1**2 - m2**2) * (1 / s - 1 / (m1 + m2) ** 2) * sp.log(m1 / m2)
     # evaluate=False in order to keep same style as PDG
     return sp.Mul(
-        1 / (2 * sp.pi),
+        1 / sp.pi,
         left_term - right_term,
         evaluate=False,
     )