// Channel_Generator3V #include "PHASIC++/Channels/Single_Channel.H" #include "ATOOLS/Org/Run_Parameter.H" #include "ATOOLS/Org/MyStrStream.H" #include "ATOOLS/Org/Scoped_Settings.H" #include "PHASIC++/Channels/Channel_Elements.H" #include "PHASIC++/Channels/Vegas.H" using namespace PHASIC; using namespace ATOOLS; namespace PHASIC { class C3_1 : public Single_Channel { double m_thexp; double m_alpha,m_ctmax,m_ctmin; Info_Key m_kI_2_3,m_kTC_0__1__23_4,m_kZS_136; Vegas* p_vegas; public: C3_1(int,int,Flavour*,Integration_Info * const); ~C3_1(); void GenerateWeight(Vec4D *,Cut_Data *); void GeneratePoint(Vec4D *,Cut_Data *,double *); void AddPoint(double); void MPISync() { p_vegas->MPISync(); } void Optimize() { p_vegas->Optimize(); } void EndOptimize() { p_vegas->EndOptimize(); } void WriteOut(std::string pId) { p_vegas->WriteOut(pId); } void ReadIn(std::string pId) { p_vegas->ReadIn(pId); } void ISRInfo(int &,double &,double &); std::string ChID(); }; } extern "C" Single_Channel * Getter_C3_1(int nin,int nout,Flavour* fl,Integration_Info * const info) { return new C3_1(nin,nout,fl,info); } void C3_1::GeneratePoint(Vec4D * p,Cut_Data * cuts,double * _ran) { double *ran = p_vegas->GeneratePoint(_ran); for(int i=0;iGetscutAmegic(std::string("23")); Flavour fl23 = Flavour((kf_code)(23)); Vec4D p23; double s23 = CE.MassivePropMomenta(fl23.Mass(),fl23.Width(),s23_min,s23_max,ran[0]); CE.TChannelMomenta(p[0],p[1],p23,p[4],s23,s4,0.,m_alpha,m_ctmax,m_ctmin,ran[1],ran[2]); CE.Isotropic2Momenta(p23,s2,s3,p[2],p[3],ran[3],ran[4]); } void C3_1::GenerateWeight(Vec4D* p,Cut_Data * cuts) { double wt = 1.; Vec4D p234=p[0]+p[1]; double s234_max = p234.Abs2(); double s4 = p_ms[4]; double s23_max = sqr(sqrt(s234_max)-sqrt(p_ms[4])); double s2 = p_ms[2]; double s3 = p_ms[3]; double s23_min = cuts->GetscutAmegic(std::string("23")); Flavour fl23 = Flavour((kf_code)(23)); Vec4D p23 = p[2]+p[3]; double s23 = dabs(p23.Abs2()); wt *= CE.MassivePropWeight(fl23.Mass(),fl23.Width(),s23_min,s23_max,s23,p_rans[0]); if (m_kTC_0__1__23_4.Weight()==ATOOLS::UNDEFINED_WEIGHT) m_kTC_0__1__23_4<GenerateWeight(p_rans); if (wt!=0.) wt = vw/wt/pow(2.*M_PI,3*3.-4.); m_weight = wt; } C3_1::C3_1(int nin,int nout,Flavour* fl,Integration_Info * const info) : Single_Channel(nin,nout,fl) { Settings& s = Settings::GetMainSettings(); m_name = std::string("C3_1"); m_rannum = 5; p_rans = new double[m_rannum]; m_thexp = s["THRESHOLD_EXPONENT"].Get(); m_alpha = s["TCHANNEL_ALPHA"].Get(); m_ctmax = 1.; m_ctmin = -1.; m_kI_2_3.Assign(std::string("I_2_3"),2,0,info); m_kTC_0__1__23_4.Assign(std::string("TC_0__1__23_4"),2,0,info); m_kZS_136.Assign(std::string("ZS_136"),2,0,info); p_vegas = new Vegas(m_rannum,100,m_name); } C3_1::~C3_1() { delete p_vegas; } void C3_1::ISRInfo(int & type,double & mass,double & width) { type = 2; mass = 136.7814; width = 0.; } void C3_1::AddPoint(double Value) { Single_Channel::AddPoint(Value); p_vegas->AddPoint(Value,p_rans); } std::string C3_1::ChID() { return std::string("CG2$I_2_3$MP23_23$TC_0__1__23_4$ZS_136$"); }