We present a computation of NNLO QCD corrections to the production of a Higgs boson in association with a W boson at the LHC followed by the decay of the Higgs boson to a bbˉ pair. At variance with previous NNLO QCD studies of the same process, we treat b quarks as massive. An important advantage of working with massive b quarks is that it makes the use of flavor jet algorithms unnecessary and allows us to employ conventional jet algorithms to define b jets. We compare NNLO QCD descriptions of the associated WH(bbˉ) production with massive and massless b quarks and also contrast them with the results provided by parton showers. We find O(5%) differences in fiducial cross sections computed with massless and massive b quarks. We also observe that much larger differences between massless and massive results, as well as between fixed-order and parton-shower results, can arise in selected kinematic distributions.
@article{arxiv.2003.08321,
title = {Bottom quark mass effects in associated $WH$ production with $H \to b\bar{b}$ decay through NNLO QCD},
author = {Arnd Behring and Wojciech Bizon and Fabrizio Caola and Kirill Melnikov and Raoul Röntsch},
journal= {arXiv preprint arXiv:2003.08321},
year = {2020}
}