f overkill). Nevertheless, the sections
below, with allowed variations, are mainly intended to make sense for
<i>p + p</i>.

<h3>Central diffraction</h3>

Central diffraction (CD), a.k.a. double Pomeron exchange (DPE), was not 
part of the framework in [<a href="Bibliography.html" target="page">Sch94</a>]. It has now been added for 
multiparticle states, i.e. excluding the resonance region below 1 GeV 
mass, as well as other exclusive states, but only for <i>p p</i> or 
<i>pbar p</i>. It uses the same proto