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arXiv · 2112.13337

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

He-Yi Li·Ren-You Zhang·Yu Zhang·Wen-Gan Ma·Ming-Ming Long·Shu-Xiang Li
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Abstract

We thoroughly investigate both transverse momentum and threshold resummation effects on scalar-pseudoscalar pair production via quark-antiquark annihilation at the $13~ \text{TeV}$ Large Hadron Collider at QCD NLO+NLL accuracy. A factorization method is introduced to properly supplement the soft-gluon (threshold) resummation contribution from parton distribution functions to the resummed results obtained by the Collins-Soper-Sterman resummation approach. We find that the impact of the threshold-resummation improved PDFs is comparable to the resummation effect of the partonic matrix element and can even predominate in high invariant mass regions. Moreover, the loop-induced gluon-gluon fusion channel in the type-I two-Higgs-doublet model is considered in our calculation. The numerical results show that the electroweak production via quark-antiquark annihilation dominates over the gluon-initiated QCD production by $1 \sim 2$ orders of magnitude.

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He-Yi Li, Ren-You Zhang, Yu Zhang, Wen-Gan Ma, Ming-Ming Long, Shu-Xiang Li. 2021-12-26. Scalar-pseudoscalar pair production at the Large Hadron Collider at NLO+NLL accuracy in QCD. https://doi.org/10.1088/1674-1137/ac23d2

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