diff --git a/docs/appendix/dynamics.ipynb b/docs/appendix/dynamics.ipynb
index d7ad25e4..e4744ea4 100644
--- a/docs/appendix/dynamics.ipynb
+++ b/docs/appendix/dynamics.ipynb
@@ -214,8 +214,15 @@
    },
    "outputs": [],
    "source": [
-    "Γ1, Γ2, m1_1, m2_1, m1_2, m2_2 = sp.symbols(\"Gamma1 Gamma2 m1_1 m2_1 m1_2 m2_2\")\n",
-    "display_doit(FlattéSWave(s, m, (Γ1, Γ2), (m1_1, m2_1), (m1_2, m2_2)))"
+    "Γ1, Γ2, m1, m2, mπ, mΣ = sp.symbols(\"Gamma1 Gamma2 m1 m2 m_pi m_Sigma\")\n",
+    "display_doit(FlattéSWave(s, m, (Γ1, Γ2), (m1, m2), (mπ, mΣ)))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "where, in this analysis, we couple the $\\Lambda(1405)$ resonance to the channel $\\Lambda(1405) \\to \\Sigma^-\\pi^+$."
    ]
   }
  ],
@@ -238,7 +245,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.18"
+   "version": "3.9.19"
   }
  },
  "nbformat": 4,