hepmc_9.sin
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hepmc_9.sin
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	# Sindarin input for WHIZARD self-test

	model = "QCD"
	$method = "omega"
	$phs_method = "wood"
	$integration_method = "vamp"

	?logging = true
	?openmp_logging = false
	?vis_history = false
	?integration_timer = false

	seed = 0

	process hepmc_9_p = "g", "g" => "u", "ubar"

	sqrts = 8000
	beams = p, p => pdf_builtin

	cuts = all Pt > 50 [u:ubar]

	!!! Tests should be run single-threaded
	openmp_num_threads = 1

	n_events = 1
	?unweighted = true
	?read_raw = false
	?write_raw = false

	simulate (hepmc_9_p) {
	sample_format = hepmc, weight_stream
	$sample = "hepmc_9a"
	?keep_beams = true
	iterations = 1:1000
	}

	alphas = 2 * alphas

	! Recalculate with twice the coupling
	rescan "hepmc_9a" (hepmc_9_p) {
	$rescan_input_format = "hepmc"
	sample_format = weight_stream
	$sample = "hepmc_9b"
	?update_sqme = true
	}

	! Recalculate with coupling from file, i.e., original coupling
	rescan "hepmc_9a" (hepmc_9_p) {
	$rescan_input_format = "hepmc"
	sample_format = weight_stream
	$sample = "hepmc_9c"
	?update_sqme = true
	?use_alpha_s_from_file = true
	}