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L2 sensitivities for global QCD analyses

Constraints on parton distributions and their combinations



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PDF ensemble

Fits to global data sets (tolerance T2 = 10)

CT18 NNLO CT18As NNLO CT18As_Lat NNLO
MSHT20 NNLO MSHT20 approximate N3LO

Fits to partial data sets

ATLAS′2021 NNLO (t2 = 9) CT18′ NNLO reduced (T2 = 10) MSHT′2020 NNLO reduced (T2 = 10)
 

Flavor of the PDF

gluon up down upbar downbar s sbar c
u_val d_val d/u dbar/ubar
(s+sbar)/(ubar+dbar) (s+sbar)/(2*dbar) (c+cbar)/(ubar+dbar) (s-sbar)/(s+sbar)
 

Factorization scale

Q=2 GeV Q=100 GeV
 

Format of figures

Show 4,   6, or   8 most sensitive experiments;   alternatively, show all experiments with absolute sensitivities above 3