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 bb 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(bb) 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.

Bottom quark mass effects in associated WH production with the H →b b decay through NNLO QCD / A. Behring, W. Bizon, F. Caola, K. Melnikov, R. Röntsch. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 101:11(2020 Jun 16), pp. 114012.114012-1-114012.114012-16. [10.1103/PhysRevD.101.114012]

Bottom quark mass effects in associated WH production with the H →b b decay through NNLO QCD

R. Röntsch
Ultimo
2020-06-16

Abstract

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 bb 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(bb) 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.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/903725
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