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	diff --git a/FixedOrderGen/configFO.yml b/FixedOrderGen/configFO.yml
	index 2112682..e2bc8c3 100644
	--- a/FixedOrderGen/configFO.yml
	+++ b/FixedOrderGen/configFO.yml
	@@ -1,49 +1,49 @@
	-trials : 200
	+events: 200

	jets:
	min pt: 30
	R: 0.4
	algorithm: antikt
	max rapidity: 5

	beam:
	energy: 6500
	particles: [p, p]

	pdf: 230000

	process: p p => h 4j

	# fraction of events with two extremal emissions in one direction
	# that contain an unordered emission
	unordered fraction: 0.05

	scales: max jet pperp

	event output:
	- HEJFO.lhe
	# - RHEJ.lhe
	# - RHEJ_events.hepmc

	Higgs properties:
	mass: 125
	width: 0.004165
	decays: {into: [photon, photon], branching ratio: 0.0023568762400521404}

	# analysis:
	# # to use a custom analysis
	# plugin: /home/andersen/HEJ/PURE/GitReverse/build/analysis-plugins/src/libVBF.so
	# min dy12: 2.8
	# min m12: 400
	# output: HEJFO.root
	# # wtwt cut: # optional cut on (event weight)^2

	#RanLux init: ranlux.0 # file for initialisation of random number engine

	# parameters for Higgs-gluon couplings
	# this requires compilation with looptools
	# Higgs coupling:
	# use impact factors: false
	# mt: 174
	# include bottom: true
	# mb: 4.7
	diff --git a/FixedOrderGen/include/config.hh b/FixedOrderGen/include/config.hh
	index 1dd8189..0a4b878 100644
	--- a/FixedOrderGen/include/config.hh
	+++ b/FixedOrderGen/include/config.hh
	@@ -1,38 +1,38 @@
	#pragma once

	#include "yaml-cpp/yaml.h"

	#include "fastjet/JetDefinition.hh"
	#include "RHEJ/HiggsCouplingSettings.hh"
	#include "RHEJ/optional.hh"
	#include "RHEJ/config.hh"
	#include "RHEJ/output_formats.hh"
	#include "RHEJ/exceptions.hh"

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

	namespace HEJFOG{

	struct Config{
	Process process;
	- int trials;
	+ long long events;
	JetParameters jets;
	Beam beam;
	int pdf_id;
	double unordered_fraction;
	HiggsProperties Higgs_properties;
	YAML::Node analysis_parameters;
	RHEJ::ScaleGenerator scale_gen;
	std::vector<RHEJ::OutputFile> output;
	RHEJ::optional<std::string> RanLux_init;
	RHEJ::HiggsCouplingSettings Higgs_coupling;
	RHEJ::optional<UnweightSettings> unweight;
	};

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

	}
	diff --git a/FixedOrderGen/src/config.cc b/FixedOrderGen/src/config.cc
	index 22a6d7b..cfd53e7 100644
	--- a/FixedOrderGen/src/config.cc
	+++ b/FixedOrderGen/src/config.cc
	@@ -1,283 +1,283 @@
	#include "config.hh"

	#include <cctype>

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

	namespace HEJFOG{
	using RHEJ::set_from_yaml;
	using RHEJ::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", "trials", "unordered fraction", "scales", "scale factors",
	+ "process", "events", "unordered fraction", "scales", "scale factors",
	"max scale ratio", "pdf", "event output", "analysis", "RanLux init",
	};
	// add subnodes to "supported" - the assigned value is irrelevant
	for(auto && opt: opts) supported[opt] = "";
	for(auto && jet_opt: {"min pt", "algorithm", "R", "max rapidity"}){
	supported["jets"][jet_opt] = "";
	}
	for(auto && Higgs_opt: {"mass", "width"}){
	supported["Higgs properties"][Higgs_opt] = "";
	}
	supported["Higgs properties"]["decays"]["into"] = "";
	supported["Higgs properties"]["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] = "";
	}
	return supported;
	}();
	return supported;
	}

	JetParameters get_jet_parameters(
	YAML::Node const & node, std::string const & entry
	){
	const auto p = RHEJ::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");
	return result;
	}

	Beam get_Beam(
	YAML::Node const & node, std::string const & entry
	){
	Beam beam;
	std::vector<RHEJ::ParticleID> particles;
	set_from_yaml(beam.energy, node, entry, "energy");
	set_from_yaml_if_defined(particles, node, entry, "particles");
	if(! particles.empty()){
	for(RHEJ::ParticleID particle: particles){
	if(particle != RHEJ::pid::p && particle != RHEJ::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() = RHEJ::to_ParticleID(particles[0]);
	result.incoming.back() = RHEJ::to_ParticleID(particles[1]);

	for(size_t i = 0; i < result.incoming.size(); ++i){
	const RHEJ::ParticleID in = result.incoming[i];
	if(
	in != RHEJ::pid::proton && in != RHEJ::pid::p_bar
	&& !RHEJ::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 = RHEJ::to_ParticleID(particles[i]);
	if(!RHEJ::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 RHEJ::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"};
	}

	HiggsProperties get_higgs_properties(
	YAML::Node const & node, std::string const & entry
	){
	HiggsProperties 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(RHEJ::missing_option const & ex){
	throw RHEJ::missing_option{entry + ": decays: " + ex.what()};
	}
	catch(RHEJ::invalid_type const & ex){
	throw RHEJ::invalid_type{entry + ": decays: " + ex.what()};
	}
	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{
	RHEJ::assert_all_options_known(yaml, get_supported_options());
	}
	catch(RHEJ::unknown_option const & ex){
	throw RHEJ::unknown_option{std::string{"Unknown option '"} + ex.what() + "'"};
	}

	Config config;
	config.process = get_process(yaml, "process");
	- set_from_yaml(config.trials, yaml, "trials");
	+ 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 RHEJ::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.Higgs_properties = get_higgs_properties(yaml, "Higgs properties");
	set_from_yaml_if_defined(config.analysis_parameters, yaml, "analysis");
	config.scale_gen = RHEJ::ScaleGenerator{RHEJ::to_ScaleConfig(yaml)};
	set_from_yaml_if_defined(config.output, yaml, "event output");
	set_from_yaml_if_defined(config.RanLux_init, yaml, "RanLux init");
	config.Higgs_coupling = RHEJ::get_Higgs_coupling(yaml, "Higgs coupling");
	if(yaml["unweight"]) config.unweight = get_unweight(yaml, "unweight");
	return config;
	}

	}

	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 33e298d..19eb258 100644
	--- a/FixedOrderGen/src/main.cc
	+++ b/FixedOrderGen/src/main.cc
	@@ -1,242 +1,242 @@
	/**
	* 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 "RHEJ/CombinedEventWriter.hh"
	#include "RHEJ/get_analysis.hh"
	#include "RHEJ/utility.hh"
	//#include "RHEJ/EventReweighter.hh"
	#include "RHEJ/stream.hh"
	#include "RHEJ/LesHouchesWriter.hh"

	#include "EventGenerator.hh"
	#include "PhaseSpacePoint.hh"
	#include "Ranlux64Engine.hh"
	#include "ProgressBar.hh"
	#include "Unweighter.hh"

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

	constexpr double invGeV2_to_pb = 389379292.;
	}

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

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

	int main(int argn, char** argv) {
	if (argn < 2) {
	std::cerr << "\n# Usage:\n.FOgen config_file\n";
	return EXIT_FAILURE;
	}
	std::cout << banner;
	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<RHEJ::Analysis> analysis = get_analysis(
	config.analysis_parameters
	);
	assert(analysis != nullptr);

	auto ran = HEJFOG::make_Ranlux64Engine();
	if(config.RanLux_init) ran.restoreStatus(config.RanLux_init->c_str());

	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	//TODO: fix Les Houches init block (HEPRUP)
	LHEF::HEPRUP lhefheprup;
	lhefheprup.IDBMUP=std::pair<long,long>(config.beam.particles[0], config.beam.particles[1]);
	lhefheprup.EBMUP=std::make_pair(config.beam.energy, config.beam.energy);
	lhefheprup.PDFGUP=std::make_pair(0,0);
	lhefheprup.PDFSUP=std::make_pair(config.pdf_id,config.pdf_id);
	lhefheprup.NPRUP=1;
	lhefheprup.XSECUP=std::vector<double>(1.);
	lhefheprup.XERRUP=std::vector<double>(1.);
	lhefheprup.LPRUP=std::vector<int>{1};

	RHEJ::CombinedEventWriter writer{config.output, lhefheprup};

	std::map<HEJFOG::Status, int> status_counter;

	- const int test_trials = config.trials;
	+ const int test_trials = config.events;
	double FKL_xs = 0., FKL_xs_err = 0.;
	double uno_xs = 0., uno_xs_err = 0.;
	std::vector<RHEJ::Event> events;
	// warm-up phase: check how efficient we are
	std::cout << "Warm-up ...\n";
	HEJFOG::ProgressBar<int> warmup_progress{std::cout, test_trials};
	const auto warmup_start = clock::now();
	for(int trial = 0; trial < test_trials; ++trial){
	++warmup_progress;
	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));
	}
	}
	std::cout << std::endl;
	RHEJ::optional<HEJFOG::Unweighter> unweighter{};
	if(config.unweight) {
	unweighter = HEJFOG::Unweighter{
	begin(events), end(events), config.unweight->max_dev, ran
	};
	std::vector<RHEJ::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);
	}

	const double efficiency = static_cast<double>(events.size())/test_trials;
	assert(0. <= efficiency && efficiency <= 1.);
	std::cout << "Efficiency: " << efficiency << '\n';
	constexpr auto max_trials = std::numeric_limits<long long>::max();
	if(max_trials*efficiency < test_trials) {
	std::cerr << "Number of required configurations exceeds " << max_trials
	<< "\nPlease reduce the number of requested events.\n";
	std::cout.setstate(std::ios_base::badbit); // prevent LHAPDF output
	return EXIT_FAILURE;
	}
	const long long total_trials = test_trials/efficiency;
	for(auto & ev: events) {
	rescale_weights(ev, invGeV2_to_pb/total_trials);
	analysis->fill(ev, ev);
	writer.write(ev);
	if(ev.type() == RHEJ::event_type::FKL){
	FKL_xs += ev.central().weight;
	FKL_xs_err += ev.central().weight*ev.central().weight;
	}
	else {
	uno_xs += ev.central().weight;
	uno_xs_err += ev.central().weight*ev.central().weight;
	}
	}
	const auto warmup_end = clock::now();
	const std::chrono::duration<double> warmup_time = warmup_end - warmup_start;

	std::cout
	<< "Generating " << (total_trials - test_trials) << " additional configurations\n"
	"Estimated remaining time: "
	<< warmup_time.count()*(1./efficiency - 1) << " seconds.\n\n";
	HEJFOG::ProgressBar<long long> progress{std::cout, total_trials};
	progress.increment(test_trials);
	for(int trial = test_trials - 1; trial < total_trials; ++trial){
	++progress;
	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);
	}
	rescale_weights(ev, invGeV2_to_pb/total_trials);
	analysis->fill(ev, ev);
	writer.write(ev);

	if(ev.type() == RHEJ::event_type::FKL){
	FKL_xs += ev.central().weight;
	FKL_xs_err += ev.central().weight*ev.central().weight;
	}
	else {
	uno_xs += ev.central().weight;
	uno_xs_err += ev.central().weight*ev.central().weight;
	}
	}
	}
	std::cout << std::endl;

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

	std::cout.precision(10);
	std::cout.width(12);
	std::cout.setf(std::ios::fixed);
	std::cout
	<< "\nCross section: " << (FKL_xs + uno_xs)
	<< " +- " << std::sqrt(FKL_xs_err + uno_xs_err) << " (pb)"
	"\n FKL: " << FKL_xs << " +- " << std::sqrt(FKL_xs_err) << " (pb)"
	"\n unordered: " << uno_xs << " +- " << std::sqrt(uno_xs_err) << " (pb)"
	"\n";

	std::cout << '\n';
	for(auto && entry: status_counter){
	const double fraction = static_cast<double>(entry.second)/total_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/config_h_2j.yml b/FixedOrderGen/t/config_h_2j.yml
	index a666ee1..8a104af 100644
	--- a/FixedOrderGen/t/config_h_2j.yml
	+++ b/FixedOrderGen/t/config_h_2j.yml
	@@ -1,23 +1,23 @@
	-trials : 100000
	+events: 100000

	jets:
	min pt: 30
	R: 0.4
	algorithm: antikt
	max rapidity: 5

	beam:
	energy: 6500
	particles: [p, p]

	pdf: 11000

	process: p p => h 2j

	unordered fraction: 0

	scales: 125

	Higgs properties:
	mass: 125
	width: 0
	diff --git a/FixedOrderGen/t/config_h_2j_decay.yml b/FixedOrderGen/t/config_h_2j_decay.yml
	index 5d2cb31..e509690 100644
	--- a/FixedOrderGen/t/config_h_2j_decay.yml
	+++ b/FixedOrderGen/t/config_h_2j_decay.yml
	@@ -1,24 +1,24 @@
	-trials : 100000
	+events: 100000

	jets:
	min pt: 30
	R: 0.4
	algorithm: antikt
	max rapidity: 5

	beam:
	energy: 6500
	particles: [p, p]

	pdf: 11000

	process: p p => h 2j

	unordered fraction: 0

	scales: 125

	Higgs properties:
	mass: 125
	width: 0.00407
	decays: {into: [photon, photon], branching ratio: 0.00228}
	diff --git a/FixedOrderGen/t/h_2j.cc b/FixedOrderGen/t/h_2j.cc
	index fa4b70b..257e53f 100644
	--- a/FixedOrderGen/t/h_2j.cc
	+++ b/FixedOrderGen/t/h_2j.cc
	@@ -1,60 +1,60 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

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

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "Ranlux64Engine.hh"

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

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 2.0304; //calculated with "old" HEJ svn r3364

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

	auto ran = make_Ranlux64Engine();
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	- for (int trials = 0; trials < config.trials; ++trials){
	+ 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.trials;
	+ ev.central().weight /= config.events;

	const auto the_Higgs = std::find_if(
	begin(ev.outgoing()), end(ev.outgoing()),
	[](RHEJ::Sparticle const & p){ return p.type == RHEJ::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 8987842..40d0eb4 100644
	--- a/FixedOrderGen/t/h_2j_decay.cc
	+++ b/FixedOrderGen/t/h_2j_decay.cc
	@@ -1,78 +1,78 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

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

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "Ranlux64Engine.hh"

	#include "RHEJ/PDF.hh"
	#include "RHEJ/MatrixElement.hh"
	#include "RHEJ/debug.hh"

	using namespace HEJFOG;

	bool pass_dR_cut(
	std::vector<fastjet::PseudoJet> const & jets,
	std::vector<RHEJ::Sparticle> 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 = 0.00425287; //calculated with "old" HEJ svn r3364

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

	auto ran = make_Ranlux64Engine();
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	- for (int trials = 0; trials < config.trials; ++trials){
	+ 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 == RHEJ::pid::Higgs);
	assert(decay->second.size() == 2);
	auto const & gamma = decay->second;
	assert(gamma[0].type == RHEJ::pid::photon);
	assert(gamma[1].type == RHEJ::pid::photon);
	assert(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.trials;
	+ 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 c6b0339..51b3da4 100644
	--- a/FixedOrderGen/t/h_3j.cc
	+++ b/FixedOrderGen/t/h_3j.cc
	@@ -1,61 +1,61 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

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

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "Ranlux64Engine.hh"

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

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 1.0888; //calculated with "old" HEJ svn r3364

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

	auto ran = make_Ranlux64Engine();
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	- for (int trials = 0; trials < config.trials; ++trials){
	+ 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.trials;
	+ ev.central().weight /= config.events;

	const auto the_Higgs = std::find_if(
	begin(ev.outgoing()), end(ev.outgoing()),
	[](RHEJ::Sparticle const & p){ return p.type == RHEJ::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 fdfab05..6753d0c 100644
	--- a/FixedOrderGen/t/h_3j_uno1.cc
	+++ b/FixedOrderGen/t/h_3j_uno1.cc
	@@ -1,64 +1,64 @@
	#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 "Ranlux64Engine.hh"

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

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.02603824; //calculated with "old" HEJ svn r3364

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

	auto ran = make_Ranlux64Engine();
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	int uno_found = 0;
	- for (int trials = 0; trials < config.trials; ++trials){
	+ for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(generator.status() != good) continue;
	if(ev.type() != RHEJ::event_type::FKL){
	++uno_found;
	continue;
	}
	ev.central().weight *= invGeV2_to_pb;
	- ev.central().weight /= config.trials;
	+ 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 bf06a8f..deb7aea 100644
	--- a/FixedOrderGen/t/h_3j_uno2.cc
	+++ b/FixedOrderGen/t/h_3j_uno2.cc
	@@ -1,58 +1,58 @@
	#ifdef NDEBUG
	#undef NDEBUG
	#endif

	// check uno cross section

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

	#include "config.hh"
	#include "EventGenerator.hh"
	#include "Ranlux64Engine.hh"

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

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.00336012;

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

	auto ran = make_Ranlux64Engine();
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	- for (int trials = 0; trials < config.trials; ++trials){
	+ for (int trials = 0; trials < config.events; ++trials){
	auto ev = generator.gen_event();
	if(ev.type() == RHEJ::event_type::FKL) continue;
	if(generator.status() != good) continue;
	ev.central().weight *= invGeV2_to_pb;
	- ev.central().weight /= config.trials;
	+ 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 8ee0b00..05c473c 100644
	--- a/FixedOrderGen/t/h_5j.cc
	+++ b/FixedOrderGen/t/h_5j.cc
	@@ -1,56 +1,56 @@
	#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 "Ranlux64Engine.hh"

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

	using namespace HEJFOG;

	int main(){
	constexpr double invGeV2_to_pb = 389379292.;
	constexpr double xs_ref = 0.235969;

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

	auto ran = make_Ranlux64Engine();
	HEJFOG::EventGenerator generator{
	config.process,
	config.beam,
	config.scale_gen,
	config.jets,
	config.pdf_id,
	config.unordered_fraction,
	config.Higgs_properties,
	config.Higgs_coupling,
	ran
	};

	double xs = 0., xs_err = 0.;
	- for (int trials = 0; trials < config.trials; ++trials){
	+ 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.trials;
	+ 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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