Radiative corrections and threshold resummed predictions to pseudoscalar Higgs boson production

The Higgs boson's discovery has opened up a plethora of possibilities. Exploring these possibilities requires precise theoretical predictions within the SM and beyond (BSM) in conjunction with revolutionary experimental progress. My original works involve studying the BSM pseudoscalar Higgs boson production. I will begin with a brief discussion of QCD, followed by an overview of the techniques/methods we used to perform the calculations. Next, I will present the computation of radiative corrections to the production of di-pseudoscalar via gluon fusion up to NNLO in the Effective Field Theory framework. But these FO corrections become unstable in certain regions of phase space due to large logarithmic contributions. Resumming these large logs to all orders in perturbation theory can solve the problem. So next, I will discuss the resummation of Next-to-Soft-Virtual logarithms for the threshold production of a pseudoscalar Higgs boson through gluon fusion. I will talk about the phenomenological implications of the resummed results, theory uncertainties and the impact of QCD corrections on mixed scalar-pseudoscalar states. I will conclude by discussing an ongoing project that attempts to combine the FO and resummed corrections for di-pseudoscalar production.

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