Journal
PHYSICS LETTERS B
Volume 734, Issue -, Pages 210-214Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2014.05.040
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Funding
- SNSF [PP00P2_1128552]
- European Commission [PITN-GA-2010-264564]
- German Research Foundation (DFG) [DI 784/2-1]
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Theoretical uncertainties in the simulation of t (t) over barb (b) over bar 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 -> b (b) over bar channel. In this Letter we present a next-to-leading order (NLO) simulation of t (t) over barb (b) over bar production with massive b-quarks matched to the SHERPA parton shower. This allows one to extend NLO predictions to arbitrary t (t) over barb (b) over bar kinematics, including the case where one or both b-jets arise from collinear g -> b (b) over bar splittings. We find that this splitting mechanism plays an important role for the t (t) over barH(b (b) over bar) analysis. (C) 2014 The Authors. Published by Elsevier B.V.
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