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// -*- C++ -*-
//
// TwoCutBase.cc is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the TwoCutBase class.
//
#include "TwoCutBase.h"
#include "Cuts.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/Repository/CurrentGenerator.h"
using namespace ThePEG;
TwoCutBase::~TwoCutBase() {}
void TwoCutBase::describe() const {
CurrentGenerator::log() << fullName() << " has no description.\n\n";
}
bool TwoCutBase::passCuts(tcCutsPtr parent, tcPDPtr pitype, tcPDPtr pjtype,
LorentzMomentum pi, LorentzMomentum pj,
bool inci, bool incj) const {
if ( inci && incj ) return true;
else if ( inci ) {
if ( -(pj - pi).m2() <= minTij(pitype, pjtype) ) return false;
if ( pj.perp() <= minKTClus(tcPDPtr(), pjtype) ) return false;
}
else if ( incj ) {
if ( -(pi - pj).m2() <= minTij(pjtype, pitype) ) return false;
if ( pi.perp() <= minKTClus(tcPDPtr(), pitype) ) return false;
}
else {
if ( (pi + pj).m2() <= minSij(pitype, pjtype) ) return false;
double deta2 = sqr(pi.eta() - pj.eta());
double dphi = abs(pi.phi() - pj.phi());
if ( dphi > Constants::pi ) dphi = 2.0*Constants::pi - dphi;
double dr = sqrt(deta2 + sqr(dphi));
if ( dr < minDeltaR(pitype, pjtype) ) return false;
if ( min(pi.perp(), pj.perp())*dr <= minKTClus(pitype, pjtype) )
return false;
if ( 2.0*sqr(min(pi.e(), pj.e()))*(1.0 - cos(pi.angle(pj))) <
parent->currentSHat()*minDurham(pitype, pjtype) ) return false;
}
return true;
}
bool TwoCutBase::passCuts(tcCutsPtr parent, tcPPtr pi, tcPPtr pj,
bool inci, bool incj) const {
return passCuts(parent, pi->dataPtr(), pj->dataPtr(),
pi->momentum(), pj->momentum(), inci, incj);
}
AbstractNoPIOClassDescription<TwoCutBase> TwoCutBase::initTwoCutBase;
// Definition of the static class description member.
void TwoCutBase::Init() {
static ClassDocumentation<TwoCutBase> documentation
("This class corresponds to a kinematical cut to be made on a pair of "
"particles in a hard sub-process.");
}
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