NLO matching for tt¯bb¯ production with massive b-quarks

Theoretical uncertainties in the simulation of tt¯bb¯ production represent one of the main obstacles that still hamper the observation of Higgs-boson production in association with top-quark pairs in the H→bb¯ channel. In this Letter we present a next-to-leading order (NLO) simulation of tt¯bb¯ prod...

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Bibliographic Details
Published in:Physics letters. B 2014-06, Vol.734, p.210-214
Main Authors: Cascioli, F., Maierhöfer, P., Moretti, N., Pozzorini, S., Siegert, F.
Format: Article
Language:English
Subjects:
Channels
Elementary particles
Kinematics
Obstacles
Showers
Simulation
Splitting
Uncertainty
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Summary:Theoretical uncertainties in the simulation of tt¯bb¯ production represent one of the main obstacles that still hamper the observation of Higgs-boson production in association with top-quark pairs in the H→bb¯ channel. In this Letter we present a next-to-leading order (NLO) simulation of tt¯bb¯ production with massive b-quarks matched to the Sherpa parton shower. This allows one to extend NLO predictions to arbitrary tt¯bb¯ kinematics, including the case where one or both b-jets arise from collinear g→bb¯ splittings. We find that this splitting mechanism plays an important role for the tt¯H(bb¯) analysis.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2014.05.040