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Chinese Physics C > 2021, Vol. 45 > Issue(12): 123102 DOI: 10.1088/1674-1137/ac23d2

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

  • 1.

    State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China

  • 2.

    Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

  • 3.

    Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China

  • 4.

    School of Physics and Materials Science, Anhui University, Hefei 230601, China

  • 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 calculations. 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 and Shu-Xiang Li. Scalar-pseudoscalar pair production at the Large Hadron Collider at NLO+NLL accuracy in QCD[J]. Chinese Physics C. doi: 10.1088/1674-1137/ac23d2
He-Yi Li, Ren-You Zhang, Yu Zhang, Wen-Gan Ma, Ming-Ming Long and Shu-Xiang Li. Scalar-pseudoscalar pair production at the Large Hadron Collider at NLO+NLL accuracy in QCD[J]. Chinese Physics C. doi:10.1088/1674-1137/ac23d2 shu
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Received: 2021-05-30
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