Applying EFT to Higgs Pair Production in Universal Extra Dimensions
Lisa Edelhaeuser, Alexander Knochel, Thomas Steeger
TL;DR
This paper explores how the Universal Extra Dimensions model influences Higgs production at the LHC and assesses the effectiveness of the Effective Field Theory approach in capturing these effects.
Contribution
It demonstrates the matching of UED contributions to a dimension-6 operator and evaluates the EFT's validity for Higgs pair production.
Findings
UED contributions can be effectively described by a dimension-6 operator.
The EFT approach's validity depends on the number of KK modes included.
Sensitivity to KK modes affects Higgs production predictions.
Abstract
We investigate single Higgs and Higgs pair production at the LHC in models of Universal Extra Dimensions. After calculating the relevant cross sections, we use the UED model as a testing ground for the Effective Field Theory approach to physics beyond the Standard Model. We show how the UED contributions to Higgs production can be matched to a dimension-6 operator. We then discuss the range of validity of this approach, in particular for Higgs pair production, and determine the sensitivity to the number of KK modes in the loop.
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