Pythia7::StringRegion Class Reference
The StringRegion describes a region of a String in the momentum (parameter) space representation. More...
#include <StringRegion.h>
Public Member Functions | |
| const LorentzVector< double > & | ex () const |
| Return the four-vectors transverse to the string directions for this StringRegion. | |
| const LorentzVector< double > & | ey () const |
| Return the four-vectors transverse to the string directions for this StringRegion. | |
| const LorentzMomentum & | Pfwd () const |
| Return the Oriented forward light-cone momentum. | |
| const LorentzMomentum & | Pbwd () const |
| Return the Oriented backward light-cone momentum. | |
| Energy2 | remW2 () const |
| Return the energy squared available in this StringRegion. | |
| Energy2 | W2 () const |
| Return the total energy squared of this StringRegion. | |
| double | Xremf () const |
| Return the fraction of momentum remaning along the forward axis of this StringRegion. | |
| double | Xremb () const |
| Return the fraction of momentum remaning along the backward axis of this StringRegion. | |
| int | Ifwd () const |
| Return the forward index. | |
| int | Ibwd () const |
| Return the backward index. | |
| int | j () const |
Return the  index of this StringRegion. | |
| int | k () const |
Return the  index of this StringRegion. | |
| bool | aPrimaryStringRegion () const |
Return true if this StringRegion is a primary ( ) region. | |
| StringPtr | getTheStringPtr () const |
| Return the pointer to the String object. | |
| void | setXrem (double, double) const |
| Update Function. | |
| void | echo () const |
| Print function used for debugging. | |
Standard constructors and destructors. | |
| StringRegion () | |
| Default constructor. | |
| StringRegion (int j, int k, StringPtr str) | |
Create the string region (j, k) of the string str, spanned by the  and  light-cone momenta. | |
| ~StringRegion () | |
| Destructor. | |
Private Member Functions | |
| void | init () |
| Initialize this region. | |
| const LorentzMomentum & | Pplus () const |
| Return the positive light-cone momentum of the StringRegion. | |
| const LorentzMomentum & | Pminus () const |
| Return the negative light-cone momentum of the StringRegion. | |
Private Attributes | |
| int | jj |
| The j index. | |
| int | kk |
| The k index. | |
| StringPtr | theString |
| The String. | |
| LorentzVector< double > | Ex |
| The transvers-Vector in x. | |
| LorentzVector< double > | Ey |
| The transvers-Vector in y. | |
| Energy2 | w2 |
| The StringRegion total energy squared. | |
Detailed Description
The StringRegion describes a region of a String in the momentum (parameter) space representation.
During the fragmentation procedure creation and destruction of StringRegions is the reponsibility of the String class.
Internal conventions: They follow the Pythia6 conventions. Each StringRegion is ordered in the string representation given its 
indices. The StringRegion describes the region spanned by the 
light-cone momenta.
The forward, backward interfaces return the value of a side-dependent variable given the side chosen to performe the fragmentation (see String for conventions).
Definition at line 31 of file StringRegion.h.
Member Function Documentation
| void Pythia7::StringRegion::setXrem | ( | double | , | |
| double | ||||
| ) | const [inline] |
Update Function.
(Warning! Temporary, not good!)
The documentation for this class was generated from the following file:
