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arXiv · 1211.2729

NLO tools and the background to $H\rightarrow WW$

B. Holdom
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Abstract

A theory input is needed for the estimation of the largest background for the $H\rightarrow WW$ search at the LHC. This is the shape of the $m_{\ell\ell}$ spectrum from continuum $WW$ production. We find this to depend on how NLO matrix elements are merged with parton showers, and we compare the results from a number of different implementations. The results suggest that both the size of the background estimate and its uncertainty may have been underestimated. This conclusion is reinforced by a "Note Added", which comments on the LHC results released on November 14 2012.

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B. Holdom. 2013-07-08. NLO tools and the background to $H\rightarrow WW$. https://doi.org/10.1016/j.physletb.2013.06.023

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