Add notebook with AmpForm v0.15.9 test

Author: redeboer

.github/workflows/deploy.yml

@@ -25,6 +25,7 @@ jobs:
             --no-dev \
             jupyter lite build \
               --contents docs/Dp-to-pip-pip-pim.ipynb \
+              --contents docs/Dp-to-pip-pip-pim-fixed.ipynb \
               --output-dir lite
       - uses: actions/upload-pages-artifact@v3
         with:

CONTRIBUTING.md

@@ -13,6 +13,7 @@ To contribute to this repository, all you need to install is [`uv`](https://docs
     --no-dev \
     jupyter lite build \
       --contents docs/Dp-to-pip-pip-pim.ipynb \
+      --contents docs/Dp-to-pip-pip-pim-fixed.ipynb \
       --output-dir lite
   ```
 - Run all notebooks

docs/Dp-to-pip-pip-pim-fixed.ipynb

@@ -0,0 +1,106 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Symmetrization of $D^+ \\to \\pi^+ \\pi^+ \\pi^-$"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%pip install ampform==0.15.9"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "jupyter": {
+     "source_hidden": true
+    },
+    "mystnb": {
+     "code_prompt_show": "Import Python libraries"
+    },
+    "tags": [
+     "hide-cell"
+    ]
+   },
+   "outputs": [],
+   "source": [
+    "import ampform\n",
+    "import qrules\n",
+    "from ampform.dynamics.builder import (\n",
+    "    RelativisticBreitWignerBuilder,\n",
+    "    create_non_dynamic_with_ff,\n",
+    ")\n",
+    "from ampform.io import aslatex\n",
+    "from IPython.display import Math"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "reaction = qrules.generate_transitions(\n",
+    "    initial_state=\"D+\",\n",
+    "    final_state=[\"pi+\", \"pi+\", \"pi-\"],\n",
+    "    allowed_intermediate_particles=[\"rho(770)0\"],\n",
+    "    formalism=\"helicity\",\n",
+    ")\n",
+    "resonances = reaction.get_intermediate_particles()\n",
+    "assert resonances.names == [\"rho(770)0\"]\n",
+    "resonances"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "bw_builder = RelativisticBreitWignerBuilder(\n",
+    "    energy_dependent_width=True,\n",
+    "    form_factor=True,\n",
+    ")\n",
+    "model_builder = ampform.HelicityAmplitudeBuilder(reaction)\n",
+    "model_builder.dynamics.assign(\"D+\", create_non_dynamic_with_ff)\n",
+    "for name in reaction.get_intermediate_particles().names:\n",
+    "    model_builder.dynamics.assign(name, bw_builder)\n",
+    "model = model_builder.formulate()\n",
+    "model.intensity\n",
+    "Math(aslatex(model.amplitudes, terms_per_line=1))"
+   ]
+  }
+ ],
+ "metadata": {
+  "colab": {
+   "toc_visible": true
+  },
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.11"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}