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	diff --git a/FixedOrderGen/include/EventGenerator.hh b/FixedOrderGen/include/EventGenerator.hh
	index 271c688..93cbb20 100644
	--- a/FixedOrderGen/include/EventGenerator.hh
	+++ b/FixedOrderGen/include/EventGenerator.hh
	@@ -1,53 +1,53 @@
	#pragma once

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"
	#include "HEJ/RNG.hh"

	#include "JetParameters.hh"
	#include "Process.hh"
	#include "Beam.hh"
	#include "Status.hh"
	#include "ParticleProperties.hh"

	namespace HEJ{
	class Event;
	class HiggsCouplingSettings;
	class ScaleGenerator;
	}

	namespace HEJFOG{
	class EventGenerator{
	public:
	EventGenerator(
	Process process,
	Beam beam,
	HEJ::ScaleGenerator scale_gen,
	JetParameters jets,
	int pdf_id,
	double uno_chance,
	- ParticleProperties particle_properties,
	+ ParticlesPropMap particles_properties,
	HEJ::HiggsCouplingSettings Higgs_coupling,
	HEJ::RNG & ran
	);

	HEJ::Event gen_event();

	Status status() const {
	return status_;
	}

	private:
	HEJ::PDF pdf_;
	HEJ::MatrixElement ME_;
	HEJ::ScaleGenerator scale_gen_;
	Process process_;
	JetParameters jets_;
	Beam beam_;
	Status status_;
	double uno_chance_;
	- ParticleProperties particle_properties_;
	+ ParticleProperties particles_properties_;
	std::reference_wrapper<HEJ::RNG> ran_;
	};

	}
	diff --git a/FixedOrderGen/include/ParticleProperties.hh b/FixedOrderGen/include/ParticleProperties.hh
	index 7b5740a..5e72895 100644
	--- a/FixedOrderGen/include/ParticleProperties.hh
	+++ b/FixedOrderGen/include/ParticleProperties.hh
	@@ -1,13 +1,16 @@
	#pragma once

	#include <vector>
	+#include <unordered_map>

	#include "Decay.hh"

	namespace HEJFOG{
	struct ParticleProperties{
	double mass;
	double width;
	std::vector<Decay> decays;
	};
	+ using ParticlesPropMap
	+ = std::unordered_map<HEJ::ParticleID, ParticleProperties>;
	}
	diff --git a/FixedOrderGen/include/PhaseSpacePoint.hh b/FixedOrderGen/include/PhaseSpacePoint.hh
	index 0fbb769..b8b8117 100644
	--- a/FixedOrderGen/include/PhaseSpacePoint.hh
	+++ b/FixedOrderGen/include/PhaseSpacePoint.hh
	@@ -1,164 +1,164 @@
	/** \file PhaseSpacePoint.hh
	* \brief Contains the PhaseSpacePoint Class
	*/

	#pragma once

	#include <vector>

	#include "HEJ/utility.hh"
	#include "HEJ/Event.hh"
	#include "HEJ/PDG_codes.hh"
	#include "HEJ/PDF.hh"
	#include "HEJ/RNG.hh"

	#include "Status.hh"
	#include "JetParameters.hh"
	#include "ParticleProperties.hh"

	namespace HEJFOG{
	class Process;

	using HEJ::Particle;
	//! A point in resummation phase space
	class PhaseSpacePoint{
	public:
	//! Default PhaseSpacePoint Constructor
	PhaseSpacePoint() = default;

	//! PhaseSpacePoint Constructor
	/**
	* @param proc The process to generate
	* @param jet_def The Jet Definition Used
	* @param jetptmin Minimum Jet Transverse Momentum
	* @param rapmax Maximum parton rapidity
	* @param pdf The pdf set (used for sampling)
	* @param uno_chance Chance to turn a potentially unordered
	* emission into an actual one
	*
	* Initially, only FKL phase space points are generated. If the most
	* extremal emission in any direction is a quark or anti-quark and the
	* next emission is a gluon, uno_chance is the chance to turn this into
	* an unordered emission event by swapping the two flavours. At most one
	* unordered emission will be generated in this way.
	*/
	PhaseSpacePoint(
	Process const & proc,
	JetParameters const & jet_properties,
	HEJ::PDF & pdf, double E_beam,
	double uno_chance,
	- ParticleProperties const & particle_properties,
	+ ParticleProperties const & particles_properties,
	HEJ::RNG & ran
	);

	//! Get Weight Function
	/**
	* @returns Weight of Event
	*/
	double weight() const{
	return weight_;
	}

	Status status() const{
	return status_;
	}

	//! Get Incoming Function
	/**
	* @returns Incoming Particles
	*/
	std::array<Particle, 2> const & incoming() const{
	return incoming_;
	}

	//! Get Outgoing Function
	/**
	* @returns Outgoing Particles
	*/
	std::vector<Particle> const & outgoing() const{
	return outgoing_;
	}

	std::unordered_map<int, std::vector<Particle>> const & decays() const{
	return decays_;
	}

	private:

	std::vector<fastjet::PseudoJet> gen_LO_partons(
	int count, bool is_pure_jets,
	JetParameters const & jet_param,
	double max_pt,
	HEJ::RNG & ran
	);
	Particle gen_boson(
	HEJ::ParticleID bosonid, double mass, double width,
	HEJ::RNG & ran
	);
	template<class ParticleMomenta>
	fastjet::PseudoJet gen_last_momentum(
	ParticleMomenta const & other_momenta,
	double mass_square, double y
	) const;

	bool jets_ok(
	std::vector<fastjet::PseudoJet> const & Born_jets,
	std::vector<fastjet::PseudoJet> const & partons
	) const;
	void reconstruct_incoming(
	std::array<HEJ::ParticleID, 2> const & ids,
	HEJ::PDF & pdf, double E_beam,
	double uf,
	HEJ::RNG & ran
	);
	HEJ::ParticleID generate_incoming_id(
	size_t beam_idx, double x, double uf, HEJ::PDF & pdf,
	HEJ::RNG & ran
	);

	bool momentum_conserved(double ep) const;

	HEJ::Particle const & most_backward_FKL(
	std::vector<HEJ::Particle> const & partons
	) const;
	HEJ::Particle const & most_forward_FKL(
	std::vector<HEJ::Particle> const & partons
	) const;
	HEJ::Particle & most_backward_FKL(std::vector<HEJ::Particle> & partons) const;
	HEJ::Particle & most_forward_FKL(std::vector<HEJ::Particle> & partons) const;
	bool extremal_FKL_ok(
	std::vector<fastjet::PseudoJet> const & partons
	) const;
	double random_normal(double stddev, HEJ::RNG & ran);
	void maybe_turn_to_uno(double chance, HEJ::RNG & ran);
	std::vector<Particle> decay_boson(
	HEJ::Particle const & parent,
	std::vector<Decay> const & decays,
	HEJ::RNG & ran
	);
	Decay select_decay_channel(
	std::vector<Decay> const & decays,
	HEJ::RNG & ran
	);
	double gen_hard_pt(
	int np, double ptmin, double ptmax, double y,
	HEJ::RNG & ran
	);
	double gen_soft_pt(int np, double ptmax, HEJ::RNG & ran);
	double gen_parton_pt(
	int count, JetParameters const & jet_param, double ptmax, double y,
	HEJ::RNG & ran
	);


	double weight_;

	Status status_;

	std::array<Particle, 2> incoming_;
	std::vector<Particle> outgoing_;
	//! Particle decays in the format {outgoing index, decay products}
	std::unordered_map<int, std::vector<Particle>> decays_;
	};
	HEJ::UnclusteredEvent to_UnclusteredEvent(PhaseSpacePoint const & psp);
	}
	diff --git a/FixedOrderGen/include/config.hh b/FixedOrderGen/include/config.hh
	index eb65ac2..ce2371c 100644
	--- a/FixedOrderGen/include/config.hh
	+++ b/FixedOrderGen/include/config.hh
	@@ -1,37 +1,37 @@
	#pragma once

	#include "yaml-cpp/yaml.h"

	#include "HEJ/HiggsCouplingSettings.hh"
	#include "HEJ/optional.hh"
	#include "HEJ/config.hh"
	#include "HEJ/output_formats.hh"
	#include "HEJ/exceptions.hh"

	#include "Process.hh"
	#include "JetParameters.hh"
	#include "Beam.hh"
	#include "ParticleProperties.hh"
	#include "UnweightSettings.hh"

	namespace HEJFOG{

	struct Config{
	Process process;
	int events;
	JetParameters jets;
	Beam beam;
	int pdf_id;
	double unordered_fraction;
	- ParticleProperties Particle_properties;
	+ ParticlesPropMap particles_properties;
	YAML::Node analysis_parameters;
	HEJ::ScaleConfig scales;
	std::vector<HEJ::OutputFile> output;
	HEJ::RNGConfig rng;
	HEJ::HiggsCouplingSettings Higgs_coupling;
	HEJ::optional<UnweightSettings> unweight;
	};

	Config load_config(std::string const & config_file);

	}
	diff --git a/FixedOrderGen/src/EventGenerator.cc b/FixedOrderGen/src/EventGenerator.cc
	index 3c0d38f..b15217e 100644
	--- a/FixedOrderGen/src/EventGenerator.cc
	+++ b/FixedOrderGen/src/EventGenerator.cc
	@@ -1,81 +1,82 @@
	#include "EventGenerator.hh"

	#include "Process.hh"
	#include "Beam.hh"
	#include "JetParameters.hh"
	#include "PhaseSpacePoint.hh"

	#include "HEJ/Event.hh"
	#include "HEJ/config.hh"

	namespace HEJFOG{
	EventGenerator::EventGenerator(
	Process process,
	Beam beam,
	HEJ::ScaleGenerator scale_gen,
	JetParameters jets,
	int pdf_id,
	double uno_chance,
	- ParticleProperties particle_properties,
	+ ParticlesPropMap particles_properties,
	HEJ::HiggsCouplingSettings Higgs_coupling,
	HEJ::RNG & ran
	):
	pdf_{pdf_id, beam.particles[0], beam.particles[1]},
	ME_{
	[this](double mu){ return pdf_.Halphas(mu); },
	HEJ::MatrixElementConfig{
	HEJ::JetParameters{jets.def, jets.min_pt},
	false,
	std::move(Higgs_coupling)
	}
	},
	scale_gen_{std::move(scale_gen)},
	process_{std::move(process)},
	jets_{std::move(jets)},
	beam_{std::move(beam)},
	uno_chance_{uno_chance},
	- particle_properties_{std::move(particle_properties)},
	+ particles_properties_{std::move(particles_properties[HEJ::pid::Higgs])},
	+ /// @TODO store ParticlesPropMap instead of this hack
	ran_{ran}
	{
	}

	HEJ::Event EventGenerator::gen_event(){
	HEJFOG::PhaseSpacePoint psp{
	process_,
	jets_,
	pdf_, beam_.energy,
	uno_chance_,
	- particle_properties_,
	+ particles_properties_,
	ran_
	};
	status_ = psp.status();
	if(status_ != good) return {};

	- HEJ::Event ev = scale_gen_(
	+ HEJ::Event ev = scale_gen_(
	HEJ::Event{
	to_UnclusteredEvent(std::move(psp)),
	jets_.def, jets_.min_pt
	}
	);

	const double shat = HEJ::shat(ev);
	const double xa = (ev.incoming()[0].E()-ev.incoming()[0].pz())/(2.*beam_.energy);
	const double xb = (ev.incoming()[1].E()+ev.incoming()[1].pz())/(2.*beam_.energy);

	// evaluate matrix element on this point
	ev.central().weight *= ME_.tree(
	ev.central().mur, ev.incoming(), ev.outgoing(), false
	)/(shat*shat);
	ev.central().weight *= pdf_.pdfpt(0,xa,ev.central().muf, ev.incoming()[0].type);
	ev.central().weight *= pdf_.pdfpt(0,xb,ev.central().muf, ev.incoming()[1].type);
	for(auto & var: ev.variations()){
	var.weight *= ME_.tree(
	var.mur, ev.incoming(), ev.outgoing(), false
	)/(shat*shat);
	var.weight *= pdf_.pdfpt(0,xa,var.muf, ev.incoming()[0].type);
	var.weight *= pdf_.pdfpt(0,xb,var.muf, ev.incoming()[1].type);
	}
	return ev;
	}

	}
	diff --git a/FixedOrderGen/src/config.cc b/FixedOrderGen/src/config.cc
	index b32f95c..fe4b9dc 100644
	--- a/FixedOrderGen/src/config.cc
	+++ b/FixedOrderGen/src/config.cc
	@@ -1,290 +1,305 @@
	#include "config.hh"

	#include <cctype>

	#include "HEJ/config.hh"
	#include "HEJ/YAMLreader.hh"

	namespace HEJFOG{
	using HEJ::set_from_yaml;
	using HEJ::set_from_yaml_if_defined;

	namespace{
	//! Get YAML tree of supported options
	/**
	* The configuration file is checked against this tree of options
	* in assert_all_options_known.
	*/
	YAML::Node const & get_supported_options(){
	const static YAML::Node supported = [](){
	YAML::Node supported;
	static const auto opts = {
	"process", "events", "unordered fraction", "scales", "scale factors",
	"max scale ratio", "pdf", "event output", "analysis", "import scales"
	};
	// add subnodes to "supported" - the assigned value is irrelevant
	for(auto && opt: opts) supported[opt] = "";
	for(auto && jet_opt: {"min pt", "peak pt", "algorithm", "R", "max rapidity"}){
	supported["jets"][jet_opt] = "";
	}
	for(auto && particle_type: {"Higgs", "Wp", "Wm", "Z"}){
	for(auto && particle_opt: {"mass", "width"}){
	supported["Particle properties"][particle_type][particle_opt] = "";
	}
	supported["Particle properties"][particle_type]["decays"]["into"] = "";
	supported["Particle properties"][particle_type]["decays"]["branching ratio"] = "";
	}
	for(auto && opt: {"mt", "use impact factors", "include bottom", "mb"}){
	supported["Higgs coupling"][opt] = "";
	}
	for(auto && beam_opt: {"energy", "particles"}){
	supported["beam"][beam_opt] = "";
	}
	for(auto && unweight_opt: {"sample size", "max deviation"}){
	supported["unweight"][unweight_opt] = "";
	}
	for(auto && opt: {"name", "seed"}){
	supported["random generator"][opt] = "";
	}
	return supported;
	}();
	return supported;
	}

	JetParameters get_jet_parameters(
	YAML::Node const & node, std::string const & entry
	){
	const auto p = HEJ::get_jet_parameters(node, entry);
	JetParameters result;
	result.def = p.def;
	result.min_pt = p.min_pt;
	set_from_yaml(result.max_y, node, entry, "max rapidity");
	set_from_yaml_if_defined(result.peak_pt, node, entry, "peak pt");
	return result;
	}

	Beam get_Beam(
	YAML::Node const & node, std::string const & entry
	){
	Beam beam;
	std::vector<HEJ::ParticleID> particles;
	set_from_yaml(beam.energy, node, entry, "energy");
	set_from_yaml_if_defined(particles, node, entry, "particles");
	if(! particles.empty()){
	for(HEJ::ParticleID particle: particles){
	if(particle != HEJ::pid::p && particle != HEJ::pid::p_bar){
	throw std::invalid_argument{
	"Unsupported value in option " + entry + ": particles:"
	" only proton ('p') and antiproton ('p_bar') beams are supported"
	};
	}
	}
	if(particles.size() != 2){
	throw std::invalid_argument{"Not exactly two beam particles"};
	}
	beam.particles.front() = particles.front();
	beam.particles.back() = particles.back();
	}
	return beam;
	}

	std::vector<std::string> split(
	std::string const & str, std::string const & delims
	){
	std::vector<std::string> result;
	for(size_t begin, end = 0; end != str.npos;){
	begin = str.find_first_not_of(delims, end);
	if(begin == str.npos) break;
	end = str.find_first_of(delims, begin + 1);
	result.emplace_back(str.substr(begin, end - begin));
	}
	return result;
	}

	std::invalid_argument invalid_incoming(std::string const & what){
	return std::invalid_argument{
	"Incoming particle type " + what + " not supported,"
	" incoming particles have to be 'p', 'p_bar' or partons"
	};
	}

	std::invalid_argument invalid_outgoing(std::string const & what){
	return std::invalid_argument{
	"Outgoing particle type " + what + " not supported,"
	" outgoing particles have to be 'j', 'photon', 'W+', 'W-', 'Z', 'H'"
	};
	}

	Process get_process(
	YAML::Node const & node, std::string const & entry
	){
	Process result;

	std::string process_string;
	set_from_yaml(process_string, node, entry);
	assert(! process_string.empty());
	const auto particles = split(process_string, " \n\t\v=>");
	if(particles.size() < 3){
	throw std::invalid_argument{
	"Bad format in option process: '" + process_string
	+ "', expected format is 'in1 in2 => out1 ...'"
	};
	}
	result.incoming.front() = HEJ::to_ParticleID(particles[0]);
	result.incoming.back() = HEJ::to_ParticleID(particles[1]);

	for(size_t i = 0; i < result.incoming.size(); ++i){
	const HEJ::ParticleID in = result.incoming[i];
	if(
	in != HEJ::pid::proton && in != HEJ::pid::p_bar
	&& !HEJ::is_parton(in)
	){
	throw invalid_incoming(particles[i]);
	}
	}
	result.njets = 0;
	for(size_t i = result.incoming.size(); i < particles.size(); ++i){
	assert(! particles[i].empty());
	if(particles[i] == "j") ++result.njets;
	else if(std::isdigit(particles[i].front())){
	if(particles[i].back() != 'j'){
	throw invalid_outgoing(particles[i]);
	}
	result.njets += std::stoi(particles[i]);
	}
	else{
	const auto pid = HEJ::to_ParticleID(particles[i]);
	if(!HEJ::is_AWZH_boson(pid)){
	throw invalid_outgoing(particles[i]);
	}
	if(result.boson){
	throw std::invalid_argument{
	"More than one outgoing boson is not supported"
	};
	}
	result.boson = pid;
	}
	}
	if(result.njets < 2){
	throw std::invalid_argument{
	"Process has to include at least two jets ('j')"
	};
	}
	return result;
	}

	Decay get_decay(YAML::Node const & node){
	Decay decay;
	set_from_yaml(decay.products, node, "into");
	set_from_yaml(decay.branching_ratio, node, "branching ratio");
	return decay;
	}

	std::vector<Decay> get_decays(YAML::Node const & node){
	using YAML::NodeType;
	if(!node) return {};
	switch(node.Type()){
	case NodeType::Null:
	case NodeType::Undefined:
	return {};
	case NodeType::Scalar:
	throw HEJ::invalid_type{"value is not a list of decays"};
	case NodeType::Map:
	return {get_decay(node)};
	case NodeType::Sequence:
	std::vector<Decay> result;
	for(auto && decay_str: node){
	result.emplace_back();
	set_from_yaml(result.back().products, decay_str, "into");
	set_from_yaml(result.back().branching_ratio, decay_str, "branching ratio");
	}
	return result;
	}
	throw std::logic_error{"unreachable"};
	}

	ParticleProperties get_particle_properties(
	YAML::Node const & node, std::string const & entry
	){
	ParticleProperties result;
	set_from_yaml(result.mass, node, entry, "mass");
	set_from_yaml(result.width, node, entry, "width");
	try{
	result.decays = get_decays(node[entry]["decays"]);
	}
	catch(HEJ::missing_option const & ex){
	throw HEJ::missing_option{entry + ": decays: " + ex.what()};
	}
	catch(HEJ::invalid_type const & ex){
	throw HEJ::invalid_type{entry + ": decays: " + ex.what()};
	}
	return result;
	}

	+ ParticlesPropMap get_all_particles_properties(YAML::Node const & node){
	+ ParticlesPropMap result;
	+ using namespace HEJ;
	+ // @TODO allow more synonyms
	+ if(node["Higgs"])
	+ result[pid::Higgs] = get_particle_properties(node,"Higgs");
	+ if(node["Wp"])
	+ result[pid::Wp] = get_particle_properties(node,"Wp");
	+ if(node["Wm"])
	+ result[pid::Wm] = get_particle_properties(node,"Wm");
	+ if(node["Z"])
	+ result[pid::Z] = get_particle_properties(node,"Z");
	+ return result;
	+ }
	+
	UnweightSettings get_unweight(
	YAML::Node const & node, std::string const & entry
	){
	UnweightSettings result;
	set_from_yaml(result.sample_size, node, entry, "sample size");
	if(result.sample_size <= 0){
	throw std::invalid_argument{
	"negative sample size " + std::to_string(result.sample_size)
	};
	}
	set_from_yaml(result.max_dev, node, entry, "max deviation");
	return result;
	}

	Config to_Config(YAML::Node const & yaml){
	try{
	HEJ::assert_all_options_known(yaml, get_supported_options());
	}
	catch(HEJ::unknown_option const & ex){
	throw HEJ::unknown_option{std::string{"Unknown option '"} + ex.what() + "'"};
	}

	Config config;
	config.process = get_process(yaml, "process");
	set_from_yaml(config.events, yaml, "events");
	config.jets = get_jet_parameters(yaml, "jets");
	config.beam = get_Beam(yaml, "beam");
	for(size_t i = 0; i < config.process.incoming.size(); ++i){
	const auto & in = config.process.incoming[i];
	using namespace HEJ::pid;
	if( (in == p \|\| in == p_bar) && in != config.beam.particles[i]){
	throw std::invalid_argument{
	"Particle type of beam " + std::to_string(i+1) + " incompatible"
	+ " with type of incoming particle " + std::to_string(i+1)
	};
	}
	}
	set_from_yaml(config.pdf_id, yaml, "pdf");
	set_from_yaml(config.unordered_fraction, yaml, "unordered fraction");
	if(config.unordered_fraction < 0 \|\| config.unordered_fraction > 1){
	throw std::invalid_argument{
	"unordered fraction has to be between 0 and 1"
	};
	}
	- config.Particle_properties = get_particle_properties(
	- yaml["Particle properties"], "Higgs");
	+ config.particles_properties = get_all_particles_properties(
	+ yaml["Particle properties"]);
	set_from_yaml_if_defined(config.analysis_parameters, yaml, "analysis");
	config.scales = HEJ::to_ScaleConfig(yaml);
	set_from_yaml_if_defined(config.output, yaml, "event output");
	config.rng = HEJ::to_RNGConfig(yaml, "random generator");
	config.Higgs_coupling = HEJ::get_Higgs_coupling(yaml, "Higgs coupling");
	if(yaml["unweight"]) config.unweight = get_unweight(yaml, "unweight");
	return config;
	}

	} // namespace anonymous

	Config load_config(std::string const & config_file){
	try{
	return to_Config(YAML::LoadFile(config_file));
	}
	catch(...){
	std::cerr << "Error reading " << config_file << ":\n ";
	throw;
	}
	}
	}
	diff --git a/FixedOrderGen/src/main.cc b/FixedOrderGen/src/main.cc
	index f114128..0a8d9cf 100644
	--- a/FixedOrderGen/src/main.cc
	+++ b/FixedOrderGen/src/main.cc
	@@ -1,247 +1,247 @@
	/**
	* Name: main.cc
	* Authors: Jeppe R. Andersen
	*/

	#include <fstream>
	#include <algorithm>
	#include <memory>
	#include <chrono>
	#include <iostream>
	#include <map>

	#include "yaml-cpp/yaml.h"

	#include "config.hh"

	#include "LHEF/LHEF.h"
	#include "HEJ/CombinedEventWriter.hh"
	#include "HEJ/get_analysis.hh"
	#include "HEJ/utility.hh"
	//#include "HEJ/EventReweighter.hh"
	#include "HEJ/stream.hh"
	#include "HEJ/LesHouchesWriter.hh"
	#include "HEJ/ProgressBar.hh"
	#include "HEJ/make_RNG.hh"

	#include "EventGenerator.hh"
	#include "PhaseSpacePoint.hh"
	#include "Unweighter.hh"
	#include "CrossSectionAccumulator.hh"
	#include "Version.hh"

	namespace{
	constexpr auto banner =
	" __ ___ __ ______ __ __ \n"
	" / / / (_)___ _/ /_ / ____/___ ___ _________ ___ __ / /__ / /______ \n"
	" / /_/ / / __ `/ __ \\ / __/ / __ \\/ _ \\/ ___/ __ `/ / / / __ / / _ \\/ __/ ___/ \n"
	" / __ / / /_/ / / / / / /___/ / / / __/ / / /_/ / /_/ / / /_/ / __/ /_(__ ) \n"
	" /_/ /_/_/\\__, /_/ /_/ /_____/_/ /_/\\___/_/ \\__, /\\__, / \\____/\\___/\\__/____/ \n"
	" ____///__/ __ ____ ///__//____/ ______ __ \n"
	" / ____(_) _____ ____/ / / __ \\_________/ /__ _____ / ____/__ ____ ___ _________ _/ /_____ _____\n"
	" / /_ / / \|/_/ _ \\/ __ / / / / / ___/ __ / _ \\/ ___/ / / __/ _ \\/ __ \\/ _ \\/ ___/ __ `/ __/ __ \\/ ___/\n"
	" / __/ / /> </ __/ /_/ / / /_/ / / / /_/ / __/ / / /_/ / __/ / / / __/ / / /_/ / /_/ /_/ / / \n"
	" /_/ /_/_/\|_\|\\___/\\__,_/ \\____/_/ \\__,_/\\___/_/ \\____/\\___/_/ /_/\\___/_/ \\__,_/\\__/\\____/_/ \n"
	;

	constexpr double invGeV2_to_pb = 389379292.;
	constexpr long long max_warmup_events = 10000;
	}

	HEJFOG::Config load_config(char const * filename){
	try{
	return HEJFOG::load_config(filename);
	}
	catch(std::exception const & exc){
	std::cerr << "Error: " << exc.what() << '\n';
	std::exit(EXIT_FAILURE);
	}
	}

	std::unique_ptr<HEJ::Analysis> get_analysis(
	YAML::Node const & parameters
	){
	try{
	return HEJ::get_analysis(parameters);
	}
	catch(std::exception const & exc){
	std::cerr << "Failed to load analysis: " << exc.what() << '\n';
	std::exit(EXIT_FAILURE);
	}
	}

	void rescale_weights(HEJ::Event & ev, double factor) {
	ev.central().weight *= factor;
	for(auto & var: ev.variations()){
	var.weight *= factor;
	}
	}

	int main(int argn, char** argv) {
	using namespace std::string_literals;
	if (argn < 2) {
	std::cerr << "\n# Usage:\n.FOgen config_file\n";
	return EXIT_FAILURE;
	}
	std::cout << banner;
	std::cout << "Version " << HEJFOG::Version::String()
	<< ", revision " << HEJFOG::Version::revision() << std::endl;
	fastjet::ClusterSequence::print_banner();
	using clock = std::chrono::system_clock;

	const auto start_time = clock::now();

	// read configuration
	auto config = load_config(argv[1]);

	std::unique_ptr<HEJ::Analysis> analysis = get_analysis(
	config.analysis_parameters
	);
	assert(analysis != nullptr);

	auto ran = HEJ::make_RNG(config.rng.name, config.rng.seed);
	assert(ran != nullptr);

	HEJ::ScaleGenerator scale_gen{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	};

	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	std::move(scale_gen),
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	*ran
	};

	LHEF::HEPRUP heprup;
	heprup.IDBMUP=std::pair<long,long>(config.beam.particles[0], config.beam.particles[1]);
	heprup.EBMUP=std::make_pair(config.beam.energy, config.beam.energy);
	heprup.PDFGUP=std::make_pair(0,0);
	heprup.PDFSUP=std::make_pair(config.pdf_id,config.pdf_id);
	heprup.NPRUP=1;
	heprup.XSECUP=std::vector<double>(1.);
	heprup.XERRUP=std::vector<double>(1.);
	heprup.LPRUP=std::vector<int>{1};
	heprup.generators.emplace_back(LHEF::XMLTag{});
	heprup.generators.back().name = HEJFOG::Version::package_name();
	heprup.generators.back().version = HEJFOG::Version::String();

	HEJ::CombinedEventWriter writer{config.output, heprup};

	HEJ::optional<HEJFOG::Unweighter> unweighter{};
	std::map<HEJFOG::Status, int> status_counter;

	std::vector<HEJ::Event> events;
	int trials = 0;
	// warm-up phase to train unweighter
	if(config.unweight) {
	std::cout << "Calibrating unweighting ...\n";
	const auto warmup_start = clock::now();
	const size_t warmup_events = config.unweight->sample_size;
	HEJ::ProgressBar<size_t> warmup_progress{std::cout, warmup_events};
	for(; events.size() < warmup_events; ++trials){
	auto ev = generator.gen_event();
	++status_counter[generator.status()];
	if(generator.status() == HEJFOG::good && analysis->pass_cuts(ev, ev)) {
	events.emplace_back(std::move(ev));
	++warmup_progress;
	}
	}
	std::cout << std::endl;
	unweighter = HEJFOG::Unweighter{
	begin(events), end(events), config.unweight->max_dev, *ran,
	config.jets.peak_pt?(*config.jets.peak_pt):0.
	};
	std::vector<HEJ::Event> unweighted_events;
	for(auto && ev: events) {
	auto unweighted = unweighter->unweight(std::move(ev));
	if(unweighted) {
	unweighted_events.emplace_back(std::move(*unweighted));
	}
	}
	events = std::move(unweighted_events);
	if(events.empty()) {
	std::cerr <<
	"Failed to generate events. Please increase \"unweight: sample size\""
	" or reduce \"unweight: max deviation\"\n";
	return EXIT_FAILURE;
	}
	const auto warmup_end = clock::now();
	const double completion = static_cast<double>(events.size())/config.events;
	const std::chrono::duration<double> remaining_time =
	(warmup_end- warmup_start)*(1./completion - 1);
	const auto finish = clock::to_time_t(
	std::chrono::time_point_cast<std::chrono::seconds>(warmup_end + remaining_time)
	);
	std::cout
	<< "Generated " << events.size() << "/" << config.events << " events ("
	<< static_cast<int>(std::round(100*completion)) << "%)\n"
	<< "Estimated remaining generation time: "
	<< remaining_time.count() << " seconds ("
	<< std::put_time(std::localtime(&finish), "%c") << ")\n\n";
	}

	HEJ::ProgressBar<long long> progress{std::cout, config.events};
	progress.increment(events.size());
	events.reserve(config.events);
	for(; events.size() < static_cast<size_t>(config.events); ++trials){
	auto ev = generator.gen_event();
	++status_counter[generator.status()];
	if(generator.status() == HEJFOG::good && analysis->pass_cuts(ev, ev)) {
	if(unweighter) {
	auto unweighted = unweighter->unweight(std::move(ev));
	if(! unweighted) continue;
	ev = std::move(*unweighted);
	}
	events.emplace_back(std::move(ev));
	++progress;
	}
	}
	std::cout << std::endl;

	HEJFOG::CrossSectionAccumulator xs;
	for(auto & ev: events){
	rescale_weights(ev, invGeV2_to_pb/trials);
	analysis->fill(ev, ev);
	writer.write(ev);
	xs.fill(ev);
	}
	analysis->finalise();

	const std::chrono::duration<double> run_time = (clock::now() - start_time);
	std::cout << "\nTask Runtime: " << run_time.count() << " seconds.\n\n";

	std::cout.precision(10);
	std::cout.setf(std::ios::fixed);
	std::cout
	<< " " << std::left << std::setw(20)
	<< "Cross section: " << xs.total().value
	<< " +- " << std::sqrt(xs.total().error) << " (pb)\n";
	for(auto const & xs_type: xs) {
	std::cout
	<< " " << std::left << std::setw(20)
	<< (HEJ::event_type::names[xs_type.first] + ": "s)
	<< xs_type.second.value << " +- "
	<< std::sqrt(xs_type.second.error) << " (pb)\n";
	}

	std::cout << '\n';
	for(auto && entry: status_counter){
	const double fraction = static_cast<double>(entry.second)/trials;
	const int percent = std::round(100*fraction);
	std::cout << "status "
	<< std::left << std::setw(16) << (to_string(entry.first) + ":")
	<< " [";
	for(int i = 0; i < percent/2; ++i) std::cout << '#';
	for(int i = percent/2; i < 50; ++i) std::cout << ' ';
	std::cout << "] " << percent << "%\n";
	}

	}
	diff --git a/FixedOrderGen/t/2j.cc b/FixedOrderGen/t/2j.cc
	index 402f6c4..7e0aaef 100644
	--- a/FixedOrderGen/t/2j.cc
	+++ b/FixedOrderGen/t/2j.cc
	@@ -1,57 +1,57 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Mixmax.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 86.42031848*1e6; //calculated with "combined" HEJ svn r3480

	auto config = load_config("config_2j.yml");

	HEJ::Mixmax ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';

	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.01*xs);
	}
	diff --git a/FixedOrderGen/t/4j.cc b/FixedOrderGen/t/4j.cc
	index 174ddad..dc543d3 100644
	--- a/FixedOrderGen/t/4j.cc
	+++ b/FixedOrderGen/t/4j.cc
	@@ -1,58 +1,58 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Mixmax.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.81063619*1e6; //calculated with "combined" HEJ svn r3480

	auto config = load_config("config_2j.yml");
	config.process.njets = 4;

	HEJ::Mixmax ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';

	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.03*xs);
	}
	diff --git a/FixedOrderGen/t/h_2j.cc b/FixedOrderGen/t/h_2j.cc
	index 8618631..241348c 100644
	--- a/FixedOrderGen/t/h_2j.cc
	+++ b/FixedOrderGen/t/h_2j.cc
	@@ -1,65 +1,65 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Ranlux64.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 2.04928; // +- 0.00377252
	//calculated with rHEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20

	auto config = load_config("config_h_2j.yml");

	HEJ::Ranlux64 ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	const auto the_Higgs = std::find_if(
	begin(ev.outgoing()), end(ev.outgoing()),
	[](HEJ::Particle const & p){ return p.type == HEJ::ParticleID::h; }
	);
	assert(the_Higgs != end(ev.outgoing()));
	if(std::abs(the_Higgs->rapidity()) > 5.) continue;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';

	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.01*xs);
	}
	diff --git a/FixedOrderGen/t/h_2j_decay.cc b/FixedOrderGen/t/h_2j_decay.cc
	index df3fc32..3896fb7 100644
	--- a/FixedOrderGen/t/h_2j_decay.cc
	+++ b/FixedOrderGen/t/h_2j_decay.cc
	@@ -1,83 +1,83 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Ranlux64.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"
	#include "HEJ/utility.hh"

	using namespace HEJFOG;

	bool pass_dR_cut(
	std::vector<fastjet::PseudoJet> const & jets,
	std::vector<HEJ::Particle> const & photons
	){
	constexpr double delta_R_min = 0.7;
	for(auto const & jet: jets){
	for(auto const & photon: photons){
	if(jet.delta_R(photon.p) < delta_R_min) return false;
	}
	}
	return true;
	}

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.00429198; // +- 1.0488e-05
	//calculated with rHEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20

	auto config = load_config("config_h_2j_decay.yml");

	HEJ::Ranlux64 ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	assert(ev.decays().size() == 1);
	const auto decay = begin(ev.decays());
	assert(ev.outgoing().size() > static_cast<size_t>(decay->first));
	const auto & the_Higgs = ev.outgoing()[decay->first];
	assert(the_Higgs.type == HEJ::pid::Higgs);
	assert(decay->second.size() == 2);
	auto const & gamma = decay->second;
	assert(gamma[0].type == HEJ::pid::photon);
	assert(gamma[1].type == HEJ::pid::photon);
	assert(HEJ::nearby_ep(gamma[0].p + gamma[1].p, the_Higgs.p, 1e-6));
	if(!pass_dR_cut(ev.jets(), gamma)) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';

	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.012*xs);
	}
	diff --git a/FixedOrderGen/t/h_3j.cc b/FixedOrderGen/t/h_3j.cc
	index 68850eb..f06bc0a 100644
	--- a/FixedOrderGen/t/h_3j.cc
	+++ b/FixedOrderGen/t/h_3j.cc
	@@ -1,66 +1,66 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Ranlux64.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 1.08083; // +- 0.00615934
	//calculated with rHEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20

	auto config = load_config("config_h_2j.yml");
	config.process.njets = 3;

	HEJ::Ranlux64 ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	const auto the_Higgs = std::find_if(
	begin(ev.outgoing()), end(ev.outgoing()),
	[](HEJ::Particle const & p){ return p.type == HEJ::ParticleID::h; }
	);
	assert(the_Higgs != end(ev.outgoing()));
	if(std::abs(the_Higgs->rapidity()) > 5.) continue;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';

	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.02*xs);
	}
	diff --git a/FixedOrderGen/t/h_3j_uno1.cc b/FixedOrderGen/t/h_3j_uno1.cc
	index 4320b88..2eaee1a 100644
	--- a/FixedOrderGen/t/h_3j_uno1.cc
	+++ b/FixedOrderGen/t/h_3j_uno1.cc
	@@ -1,69 +1,69 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	// check that adding uno emissions doesn't change the FKL cross section

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Ranlux64.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.0243548; // +- 0.000119862
	//calculated with rHEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20

	auto config = load_config("config_h_2j.yml");
	config.process.njets = 3;
	config.process.incoming = {HEJ::pid::u, HEJ::pid::u};
	config.unordered_fraction = 0.37;

	HEJ::Ranlux64 ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	int uno_found = 0;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	if(ev.type() != HEJ::event_type::FKL){
	++uno_found;
	continue;
	}
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';
	std::cout << uno_found << " events with unordered emission\n";
	assert(uno_found > 0);
	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.05*xs);
	}
	diff --git a/FixedOrderGen/t/h_3j_uno2.cc b/FixedOrderGen/t/h_3j_uno2.cc
	index 0313357..0302745 100644
	--- a/FixedOrderGen/t/h_3j_uno2.cc
	+++ b/FixedOrderGen/t/h_3j_uno2.cc
	@@ -1,63 +1,63 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	// check uno cross section

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Ranlux64.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.00347538; // +- 3.85875e-05
	//calculated with rHEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20

	auto config = load_config("config_h_2j.yml");
	config.process.njets = 3;
	config.process.incoming = {HEJ::pid::u, HEJ::pid::u};
	config.unordered_fraction = 1.;

	HEJ::Ranlux64 ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(ev.type() == HEJ::event_type::FKL) continue;
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';
	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.05*xs);
	}
	diff --git a/FixedOrderGen/t/h_5j.cc b/FixedOrderGen/t/h_5j.cc
	index 8708e27..8841db7 100644
	--- a/FixedOrderGen/t/h_5j.cc
	+++ b/FixedOrderGen/t/h_5j.cc
	@@ -1,61 +1,61 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif
	// This is a regression test
	// the reference cross section has not been checked against any other program

	#include <algorithm>
	#include <cmath>
	#include <cassert>
	#include <iostream>

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "HEJ/Ranlux64.hh"

	#include "HEJ/PDF.hh"
	#include "HEJ/MatrixElement.hh"

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.252273; // +- 0.00657742
	//calculated with rHEJ revision 9570e3809613272ac4b8bf3236279ba23cf64d20

	auto config = load_config("config_h_2j.yml");
	config.process.njets = 5;

	HEJ::Ranlux64 ran{};
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	HEJ::ScaleGenerator{
	config.scales.base,
	config.scales.factors,
	config.scales.max_ratio
	},
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	- config.Particle_properties,
	+ config.particles_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	ev.central().weight /= config.events;

	xs += ev.central().weight;
	xs_err += ev.central().weight*ev.central().weight;
	}
	xs_err = std::sqrt(xs_err);
	std::cout << xs_ref << " ~ " << xs << " +- " << xs_err << '\n';

	assert(std::abs(xs - xs_ref) < 3*xs_err);
	assert(xs_err < 0.06*xs);
	}

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