Higgs boson pair production in the D = 6 extension of the SM

By Florian Goertz, A. Papaefstathiou, Li Lin Yang, Jose Manuel Zurita. 2014

162 citations recorded by the source corpus.

A bstractWe derive the constraints that can be imposed on the dimension-6 effective theory extension of the Standard Model, using gluon fusion-initiated Higgs boson pair production at the LHC. We use a realistic analysis focussing on the hh→bb¯τ+τ−$$ hh\to \left(b\overline{b}\right)\left({\tau}^{+}{\tau}^{-}\right) $$ final state, including initial-state radiation and non-perturbative effects. We include the statistical uncertainties on the signal rates as well as conservative estimates of the theoretical uncertainties. We first consider a theory containing only modifications of the trilinear coupling, through a c6λ H6/v2 Lagrangian term, and then examine the full parameter space of the effective theory, incorporating current bounds obtained through single Higgs boson measurements. We also consider an alternative scenario, where we vary a smaller sub-set of parameters. Allowing, finally, the values of the other coefficients to vary within projected experimental ranges, we find that the currently unbounded parameter, c6, could be constrained to lie within |c6| ≲ 0.6 at 1σ confidence, at the end of the high-luminosity run of the LHC (14 TeV) in the full model, and to −0.6 ≲ c6 ≲ 0.5 in the alternative model. This study constitutes a first step towards the inclusion of multi-Higgs boson production in a full fit to the dimension-6 effective field theory framework.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/216d4bf976ffedaf86be890eb7e3e4f6f6f53fa7

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In Nuclear and High Energy Physics

Citations in the corpus

Effective field theory analysis of double Higgs boson production via gluon fusion (2015, background): “The highest sensitivity is expected to come from the bb̄τþτ− final state, which has been claimed to lead to a determination of c3 at the 40%–60% level at the highluminosity LHC with ffiffi s p 1⁄4 14 TeV and L 1⁄4 3 ab−1 [5,9,13,54].”
Herwig 7.0/Herwig++ 3.0 release note (2015, methodology): “The original implementation was described in [7] and its D = 6 EFT extension was examined in detail in [59].”
Probing the Higgs self coupling via single Higgs production at the LHC (2016, background): “[21, 39] leading, in general, to much weaker bounds.”