Following the trail of new physics via VBF Higgs signal at the Large Hadron Collider

Abstract

We investigate the modification of the Higgs signals from vector boson fusion at the LHC arising from higher-dimensional effective operators involving quarks, electroweak gauge bosons and the 125-GeV scalar discovered in 2012. Taking a few of the admissible dimension-6 operators as illustration, we work within the framework of the Standard Model Effective Field Theory (SMEFT) and identify kinematic variables that can reflect the presence of such effective operators. The useful variables turn out to be the geometric mean of the transverse momenta of the two forward jets produced in VBF and the rapidity difference between the two forward jets. We identify the shift in event population caused by the effective operators in the same, spanned by the above kinematic variables. Minimum values of the Wilson coefficients of the chosen dimension-6 operators are identified, for which they can be probed at the $3\sigma$ level in the high luminosity run of the LHC at 14 TeV. Projected exclusion limits on some of the couplings, obtained from our analysis, can significantly improve the limits on such couplings derived from electroweak precision data.

20 pages, 10 figures and 4 tables; figure 10 is supplementary; comments added and references updated; conclusions unchanged. Accepted for publication in PRD

References in corpus (11)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Anomalous Higgs boson couplings in vector boson fusion at the CERN LHC
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Precision Measurements of Higgs Couplings: Implications for New Physics Scales
• Automated one-loop computations in the SMEFT
• Validity of SMEFT studies of VH and VV Production at NLO
• Exploration of the Tensor Structure of the Higgs Boson Coupling to Weak Bosons in $e^{+}{e}^{-}$ Collisions
• Precision SMEFT bounds from the VBF Higgs at high transverse momentum

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