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arXiv · 2012.11631

A fully differential SMEFT analysis of the golden channel using the method of moments

Shankha Banerjee·Rick S. Gupta·Oscar Ochoa-Valeriano·Michael Spannowsky·Elena Venturini
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Abstract

The Method of Moments is a powerful framework to disentangle the relative contributions of amplitudes of a specific process to its various phase space regions. We apply this method to carry out a fully differential analysis of the Higgs decay channel $h \to 4\ell$ and constrain gauge-Higgs coupling modifications parametrised by dimension-six effective operators. We find that this analysis approach provides very good constraints and minimises degeneracies in the parameter space of the effective theory. By combining the decay $h \to 4\ell$ with Higgs-associated production processes, $Wh$ and $Zh$, we obtain the strongest reported bounds on anomalous gauge-Higgs couplings.

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Shankha Banerjee, Rick S. Gupta, Oscar Ochoa-Valeriano, Michael Spannowsky, Elena Venturini. 2020-12-21. A fully differential SMEFT analysis of the golden channel using the method of moments. https://doi.org/10.1007/jhep06(2021)031

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