Speaker
Johannes Michel
(MIT CTP)
Description
I present predictions for the gluon-fusion Higgs $p_T$ spectrum at N$^3$LL$'$+N$^3$LO including fiducial $H \to \gamma\gamma$ cuts as required by experimental measurements at the LHC. Integrating the spectrum allows us to predict for the first time the total fiducial cross section to third order (N$^3$LO) and improved by resummation. I discuss several aspects of the calculation, including
- the treatment of fiducial power corrections that make the total cross section sensitive to small-$p_T$ resummation effects, and in particular enhance the N$^3$LO correction,
- the numerical extraction of the remaining nonsingular corrections at $\mathcal{O}(\alpha_s^3)$, and
- extensions to other differential Higgs cross sections at three loops, including the Higgs rapidity spectrum and the diphoton rapidity separation, where a similar sensitivity to resummation effects arises.
Authors
Bahman Dehnadi
Frank Tackmann
(Deutsches Elektronen-Synchrotron (DE))
Georgios Billis
(Deutsches Elektronen-Synchrotron DESY)
Johannes Michel
(MIT CTP)
Markus Ebert
(MIT)
