Effective field theory analysis of double Higgs boson production via gluon fusion

By A. Azatov, Roberto Contino, G. Panico, M. Son. 2015

216 citations recorded by the source corpus.

We perform a detailed study of double Higgs production via gluon fusion in the effective field theory (EFT) framework where effects from new physics (NP) are parametrized by local operators. Our analysis provides a perspective broader than the one followed in most of the previous analyses, where this process was merely considered as a way to extract the Higgs trilinear coupling. We focus on the hh -> b (b) over bar gamma gamma channel and perform a thorough simulation of signal and background at the 14 TeV LHC and a future 100 TeV proton-proton collider. We make use of invariant mass distributions to enhance the sensitivity on the EFT coefficients and give a first assessment of the impact of jet substructure techniques on the results. The range of validity of the EFT description is estimated, as required to consistently exploit the high-energy range of distributions, pointing out the potential relevance of dimension-8 operators. Our analysis contains a few important improvements over previous studies and identifies some inaccuracies there appearing in connection with the estimate of signal and background rates. The estimated precision on the Higgs trilinear coupling that follows from our results is less optimistic than previously claimed in the literature. We find that a similar to 30% accuracy can be reached on the trilinear coupling at a future 100 TeV collider with 3 ab(-1). Only an O(1) determination instead seems possible at the LHC with the same amount of integrated luminosity.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/450a6c7cd3df05dc3f3118a1a3c21f08d7b0350a

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Citations in the corpus

Higgs Boson studies at future particle colliders (2019, methodology): “An example is encountered in Higgs portal models where the Higgs boson mixes with a SM neutral scalar field, possibly contributing to the dark matter relic abundance [41, 73].”
A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector (2019, unknown): “In this context, the wealth of precision measurements presented by the LHC collaborations in recent years, together with the significant progress in the corresponding theoretical calculations and modelling of collider processes, has motivated many groups to pursue (partial) SMEFT analyses of the LHC”
Higgs Physics at the HL-LHC and HE-LHC (2019, methodology): “[285] and the S/ p B used to compute the signal significances.”
Physics at a 100 TeV pp collider: Higgs and EW symmetry breaking studies (2016, methodology): “distribution can thus be helpful to disentangle possible corrections to the various Higgs couplings [189].”
Probing the Higgs self coupling via single Higgs production at the LHC (2016, background): “[21, 39] leading, in general, to much weaker bounds.”