<?xml version="1.0" encoding="utf-8" ?>

<HelicityKinematics>
  <InitialState>
    <Particle Name="J/psi" Id="0" PositionIndex="0"></Particle>
  </InitialState>
  <FinalState>
    <Particle Name="gamma" Id="2" PositionIndex="0"></Particle>
    <Particle Name="pi0" Id="3" PositionIndex="1"></Particle>
    <Particle Name="pi0" Id="4" PositionIndex="2"></Particle>
  </FinalState>
</HelicityKinematics>

<ParticleList>
  <Particle Name="J/psi">
    <Pid>443</Pid>
    <Parameter Type="Mass" Name="Mass_jpsi">
      <Value>3.096900</Value>
      <Fix>true</Fix>
    </Parameter>
    <QuantumNumber Class="Spin" Type="Spin" Value="1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charge" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Parity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Cparity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Gparity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Spin" Type="IsoSpin" Value="0" Projection="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="BaryonNumber" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charm" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Strangeness" Value="0"></QuantumNumber>
    <DecayInfo Type="nonResonant"></DecayInfo>
  </Particle>
  <Particle Name="gamma">
    <Pid>22</Pid>
    <Parameter Type="Mass" Name="Mass_gamma">
      <Value>0.0</Value>
    </Parameter>
    <QuantumNumber Class="Spin" Type="Spin" Value="1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charge" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Parity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Cparity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Spin" Type="IsoSpin" Value="0" Projection="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="BaryonNumber" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charm" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Strangeness" Value="0"></QuantumNumber>
  </Particle>
  <Particle Name="pi0">
    <Pid>111</Pid>
    <Parameter Type="Mass" Name="Mass_neutralPion">
      <Value>0.1349766</Value>
      <Error>0.000006</Error>
    </Parameter>
    <QuantumNumber Class="Spin" Type="Spin" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charge" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Parity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Cparity" Value="1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Gparity" Value="-1"></QuantumNumber>
    <QuantumNumber Class="Spin" Type="IsoSpin" Value="1" Projection="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="BaryonNumber" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charm" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Strangeness" Value="0"></QuantumNumber>
  </Particle>
  <Particle Name="f0(980)">
    <Pid>9010221</Pid>
    <Parameter Type="Mass" Name="mass_f0980">
      <Value>0.994</Value>
      <Error>0.001</Error>
      <Fix>true</Fix>
    </Parameter>
    <QuantumNumber Class="Spin" Type="Spin" Value="0.0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Charge" Value="0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Parity" Value="1"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Cparity" Value="1"></QuantumNumber>
    <QuantumNumber Class="Spin" Type="IsoSpin" Value="0.0" Projection="0.0"></QuantumNumber>
    <QuantumNumber Class="Int" Type="Gparity" Value="1"></QuantumNumber>
    <QuantumNumber Type="BaryonNumber" Class="Int" Value="0"></QuantumNumber>
    <QuantumNumber Type="Charm" Class="Int" Value="0"></QuantumNumber>
    <QuantumNumber Type="ElectronLN" Class="Int" Value="0"></QuantumNumber>
    <QuantumNumber Type="MuonLN" Class="Int" Value="0"></QuantumNumber>
    <QuantumNumber Type="Strangeness" Class="Int" Value="0"></QuantumNumber>
    <QuantumNumber Type="TauLN" Class="Int" Value="0"></QuantumNumber>
    <DecayInfo Type="relativisticBreitWigner">
      <FormFactor Type="BlattWeisskopf"></FormFactor>
      <Parameter Type="Width" Name="width_f0980">
        <Value>0.070</Value>
      </Parameter>
      <Parameter Type="MesonRadius" Name="Radius_f0980">
        <Value>1</Value>
        <Fix>true</Fix>
        <Min>0.0</Min>
        <Max>2.0</Max>
      </Parameter>
    </DecayInfo>
  </Particle>
</ParticleList>
