Differential D47 Diff 191 EvtGenModels/EvtFourBodyPhsp.hh

Changeset View

Standalone View

EvtGenModels/EvtFourBodyPhsp.hh

This file was added.


				/***********************************************************************
				* Copyright 1998-2020 CERN for the benefit of the EvtGen authors *
				* *
				* This file is part of EvtGen. *
				* *
				* EvtGen is free software: you can redistribute it and/or modify *
				* it under the terms of the GNU General Public License as published by *
				* the Free Software Foundation, either version 3 of the License, or *
				* (at your option) any later version. *
				* *
				* EvtGen is distributed in the hope that it will be useful, *
				* but WITHOUT ANY WARRANTY; without even the implied warranty of *
				* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
				* GNU General Public License for more details. *
				* *
				* You should have received a copy of the GNU General Public License *
				* along with EvtGen. If not, see <https://www.gnu.org/licenses/>. *
				***********************************************************************/

				#ifndef EVTFOURBODYPHSP_HH
				#define EVTFOURBODYPHSP_HH

				#include <vector>
				#include <array>
				#include <utility>

				#include "EvtGenBase/EvtDecayProb.hh"

				class EvtParticle;

				class EvtFourBodyPhsp : public EvtDecayProb {
				public:
				enum Shape
				{
				rectangle = 1,
				trapezoid = 2,
				pentagon = 3,
				variable = 4
				};

				std::string getName() override;
				EvtDecayBase* clone() override;

				void init() override;
				void initProbMax() override;

				void decay( EvtParticle* parent ) override;

				private:
				std::array<double, 4> phspFactor( const double mM, const double m12,
				const double m34,
				std::array<double, 4>& daughters ) const;
				Shape determineBoundaryShape( const double m12Min, const double m12Max,
				const double m34Max,
				const double mMother ) const;

				std::pair<double, double> generatePairMasses(
				const double m12Min, const double m12Max, const double m34Min,
				const double m34Max, const double mMother,
				const EvtFourBodyPhsp::Shape shape ) const;
				std::pair<double, double> generateRectangle( const double m12Min,
				const double m12Max,
				const double m34Min,
				const double m34Max ) const;
				std::pair<double, double> generateTrapezoid( const double m12Min,
				const double m12Max,
				const double m34Min,
				const double mMother ) const;

				std::array<double, 4> m_daughterMasses{ -1, -1, -1, -1 };

				double m_m12Min;
				double m_m12Max;
				double m_m34Min;
				double m_m34Max;

				double m_trapNorm;
				double m_trapCoeff1;
				double m_trapCoeff2;

				double m_pentagonSplit;
				double m_pentagonFraction;

				Shape m_boundaryShape;

				bool m_stableMother{true};
				tlathamUnsubmitted Not Done Inline Actions I see you've given the last 3 of these initial values. Can we give the others sensible initial values as well? tlatham: I see you've given the last 3 of these initial values. Can we give the others sensible initial…
				bool m_stableDaughters{true};
				bool m_fixedBoundary{true};
				};

				#endif