QCD corrections to <math><mrow><mi>H</mi><mo stretchy="false">→</mo><mi mathvariant="italic">gg</mi></mrow></math> in FDR

I apply FDR—a recently introduced four-dimensional approach to quantum field theories (QFTs)—to the computation of the NLO QCD corrections to <math><mrow><mi>H</mi><mo stretchy="false">→</mo><mi>g</mi><mi>g</mi></mrow></math> in the large top mass limit. The calculation involves all key ingredients of QCD—namely ultraviolet, infrared, and collinear divergences, besides <math><msub><mi mathvariant="italic">α</mi><mi>S</mi></msub></math> renormalization—and paves the way for successful use of FDR in massless one-loop QFT computations. I show in detail how the correct result emerges in FDR, and discuss the translation rules to dimensional regularization