Higgs boson self-coupling measurements using ratios of cross sections

By Florian Goertz, A. Papaefstathiou, Li Lin Yang, Jose Manuel Zurita. 2013

154 citations recorded by the source corpus.

A bstractWe consider the ratio of cross sections of double-to-single Higgs boson production at the Large Hadron Collider at 14 TeV. Since both processes possess similar higherorder corrections, leading to a cancellation of uncertainties in the ratio, this observable is well-suited to constrain the trilinear Higgs boson self-coupling. We consider the scale variation, parton density function uncertainties and conservative estimates of experimental uncertainties, applied to the viable decay channels, to construct expected exclusion regions. We show that the trilinear self-coupling can be constrained to be positive with a 600 fb−1 LHC dataset at 95% confidence level. Moreover, we demonstrate that we expect to obtain a ~ +30% and ~ −20% uncertainty on the self-coupling at 3000fb−1 without statistical fitting of differential distributions. The present article outlines the most precise method of determination of the Higgs trilinear coupling to date.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/618d088ce03d032dce43a29a1cbfc839d932a047

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Citations in the corpus

Physics at a 100 TeV pp collider: Higgs and EW symmetry breaking studies (2016, background): “The HL-LHC can only determine this cubic coupling with O(100%) precision (see [297–299] and [189, 213, 300, 301]), and proposed lepton colliders with subTeV center-of-mass energies are expected to have similar or slightly better precisions (see [199, 302]).”
Higgs boson pair production in the D = 6 extension of the SM (2014, background): “These results are compatible with our previous studies in [48] if the top Yukawa coupling is kept at its SM value.”
On the maximal strength of a first-order electroweak phase transition and its gravitational wave signal (2018, unknown): “8 [102–104]) and by FCC-hh (corresponding to ∆λ3 ∼ 0.”
Gravitational wave, collider and dark matter signals from a scalar singlet electroweak baryogenesis (2017, background): “(4.1) This coupling can only be measured at the HL-LHC in double Higgs production events where the very low cross section again makes the measurement difficult.”
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].”
Testing electroweak baryogenesis with future colliders (2014, background): “Various studies have found that λ3 can be measured between 30%-50% accuracy at the 14 TeV LHC with 3 ab−1 [87–91].”
Top-quark mass effects in double and triple Higgs production in gluon-gluon fusion at NLO (2014, background): “Higgs pair production will be relevant for the high-luminosity LHC and several phenomenological studies [38–47] have recently investigated the potential of detecting the signal for the process over the backgrounds in various Higgs decay channels.”