Scalar-pseudoscalar pair production at the Large Hadron Collider at NLO+NLL accuracy in QCD *

Abstract We thoroughly investigate both transverse momentum and threshold resummation effects on scalar-pseudoscalar pair production via quark-antiquark annihilation at the Large Hadron Collider QCD NLO+NLL accuracy. A factorization method is introduced to properly supplement soft-gluon (threshold) contribution from parton distribution functions resummed results obtained by Collins-Soper-Sterman approach. find that impact of threshold-resummation improved PDFs comparable effect partonic matrix element can even predominate in high invariant mass regions. Moreover, loop-induced gluon-gluon fusion channel type-I two-Higgs-doublet model considered our calculations. The numerical show electroweak dominates over gluon-initiated 1 \sim 2$?> orders magnitude.