Oct 26 – 30, 2020
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Bottom quark mass effects in associated $WH$ production with the $H \to b\bar{b}$ decay through NNLO QCD

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Precision Session Parallel


Arnd Behring (Karlsruhe Institute of Technology (KIT))


We present a computation of next-to-next-to-leading-order (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 $b\bar{b}$ 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 $WH(b\bar{b})$ 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.

Primary author

Arnd Behring (Karlsruhe Institute of Technology (KIT))


Wojciech Jozef Bizon Fabrizio Caola (University of Oxford) Kirill Melnikov (Karlsruhe Institute of Technology (KIT)) Raoul Horst Rontsch (CERN)

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