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config.yaml
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config.yaml
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# Collinear PDF set and member to be used for the generation of the
# tables. They are assumed to be in the LHAPDF format.
pdfset:
name: "MMHT2014nnlo68cl"
member: 0
# Collinear FF set and member to be used for the generation of the
# tables. They are assumed to be in the LHAPDF format.
ffset:
name: "DSS14_NLO_PiSum"
member: 0
# Name of the b* prescription. This name has to correspond to a
# function in inc/NangaParbat/bstar.h
bstar: bstarmin
# Perturbative order of the computation. 0: LL, 1: NLL, 2: NNLL, 3:
# NNNLL, -1: NLL', -2: NNLL'
PerturbativeOrder: 3
# Initial and final scale-variation factors around mub = 2e^{-gamma_E}
# / b and Q, respectively.
TMDscales:
Ci: 1
Cf: 1
# Reference value of alpha_em.
alphaem:
aref: 0.00776578395589
Qref: 91.1876
run: true
# Parameters of the x-space subgrids on which collinear PDFs are
# tabulated.
xgridpdf:
- [60, 1e-4, 3]
- [60, 1e-1, 3]
- [50, 6e-1, 3]
- [50, 8e-1, 3]
# Parameters of the x-space subgrids on which collinear FFs are
# tabulated.
xgridff:
- [60, 1e-2, 3]
- [50, 6e-1, 3]
- [50, 8e-1, 3]
# Maximum number of Ogata-quadrature points (no more than 1000).
nOgata: 100
# Number of points, interpolation degree, and integration accuracy of
# the grid in Q.
Qgrid:
n: 10
InterDegree: 3
eps: 1e-3
# Number of points, interpolation degree, and integration accuracy of
# the grid in xi = exp(y) (used for the Drell-Yan tables).
xigrid:
n: 10
InterDegree: 3
eps: 1e-3
# Number of points, interpolation degree, and integration accuracy of
# the grid in Bjorken x (used for the SIDIS tables).
xbgrid:
n: 10
InterDegree: 3
eps: 1e-3
# Number of points, interpolation degree, and integration accuracy of
# the grid in z Bjorken (used for the SIDIS tables).
zgrid:
n: 10
InterDegree: 3
eps: 1e-3
# Maximum value allowed for the ratio qT / Q. This has to be intended
# as a "generation-level" cut meaning that only data points with qT /
# Q below this value are generated. Those above are simply set to
# zero. However, a more restrictive cut can still be applied at the
# fit level. This avoids computing predictions for points whose
# kinematics is such that TMD factorisation is not valid.
qToverQmax: 0.3