This is the declaration of the StringRegion class.
The StringRegion describes a region of a String in the momentum (parameter) space representation. During the fragmentation procedure creation and destruction of StringRegions are under the reponsibility of the String class.
Warning : Internal conventions :
They follow the
Pythia6 conventions. Each StringRegion is ordered in the string
representation given its (j,k) indices.
A (j,k) StringRegion describes the region spanned by the
p+(j) and p-(k) light-cone momenta.
The StringRegion also provides forward access to the
String and interface to Oriented
variables.
The forward, backward interfaces return the value of a side-dependent
variable given the side chosen to performe the fragmentation
(see String for conventions).
CLASS
StringRegion