strong> 
 (<code>default = <strong>no</strong></code>)<br/>
Allow a user to dampen diffractive cross sections; on/off = true/false.
  

<p/>
When <code>SigmaDiffractive:dampen = on</code>, the three diffractive 
cross sections are damped so that they never can exceed the respective 
values below. Specifically, if the standard parametrization gives 
the cross section <i>sigma_old(s)</i> and a fixed <i>sigma_max</i> 
is set, the actual cross section becomes <i>sigma_new(s) 
= sigma_old(s) * sigma_max / (sigma