equation above, defining the 
half-way point between low-mass and high-mass subsystems.
(Kinematics construction can easily fail if a system is assigned 
a primordial <i>kT</i> value higher than its mass, so the 
mass-dampening is intended to reduce some troubles later on.)
  

<p/><code>parm&nbsp; </code><strong> BeamRemnants:primordialKTremnant &nbsp;</strong> 
 (<code>default = <strong>0.4</strong></code>; <code>minimum = 0.</code>)<br/>
The width <i>sigma_remn</i>, assigned as a primordial <i>kT</i> 
to