rticle coupling to the SM fields.
  

<p/><code>parm&nbsp; </code><strong> ExtraDimensionsUnpart:ratio &nbsp;</strong> 
 (<code>default = <strong>1.0</strong></code>; <code>minimum = 1.0</code>; <code>maximum = 1.0</code>)<br/>
Ratio, <i>lambda'/lambda</i>, between the two possible coupling constants 
of the spin-2 ME. <b>Warning:</b> A <i>ratio</i> value different from one 
give rise to an IR divergence which makes the event generation very slow, so 
this values is fixed to <i>ratio = 1</i> for the moment.