Exploring Higgs-Photon Production at the LHC

Abstract

We have investigated the signal for physics beyond the Standard Model via Higgs plus photon final state, hitherto unobserved at the LHC, in the framework of Standard Model Effective Field Theory. Using the relevant dimension-6 operators, we probe two distinct classes of interactions, based on the Lorentz structure of Higgs couplings to gauge bosons and fermions. To begin with, constraints on the Wilson coefficients of these operators have been derived from existing experimental data. We then focus on the hadronic decay of the Higgs boson to two bottom quarks in the boosted regime, leading to a high $p_T$ fat-jet recoiling against a hard photon. Following a CMS Run II search for a resonance decaying into a Higgs boson and a photon, a detailed signal and background analysis for this channel has been done and limits on the relevant Wilson coefficients have been obtained. By performing a cut-based analysis, we identify some kinematic observables that distinguish between signal and SM background. Minimum values of the Wilson coefficients that will yield $3\sigma$ signal significance at the 14 TeV run of the LHC with $3000\mathrm{f}{\mathrm{b}}^{-1}$ data, have been obtained. A multivariate analysis using a boosted decision tree and exploiting the jet substructure techniques further help to isolate the regions of phase space where the contribution of SMEFT driven signal is significantly enhanced. Finally, we briefly discuss the parameter dependencies and interpretations of the allowed values of the coefficients on a particularly interesting UV complete model namely, Minimal Supersymmetric Standard Model.

arXiv comment38 pages, 19 figures and 11 tables; version accepted for publication in JHEP

References in corpus (55)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FastJet user manual
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Dimension-Six Terms in the Standard Model Lagrangian
• Parton distributions with LHC data
• Better Jet Clustering Algorithms
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Jet substructure as a new Higgs search channel at the LHC
• Identifying Boosted Objects with N-subjettiness
• Identification of b-quark jets with the CMS experiment
• The Standard Model as an Effective Field Theory
• Maximizing Boosted Top Identification by Minimizing N-subjettiness
• Effective description of general extensions of the Standard Model: the complete tree-level dictionary
• On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC
• Updated Global SMEFT Fit to Higgs, Diboson and Electroweak Data
• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• Power Counting to Better Jet Observables
• Testing new physics with the electron g-2
• Constraining the top-Higgs sector of the Standard Model Effective Field Theory
• On the Validity of the Effective Field Theory Approach to SM Precision Tests
• Energy helps accuracy: electroweak precision tests at hadron colliders
• Anomalous Higgs Boson Production and Decay
• Threshold resummation effects in Higgs boson pair production at the LHC
• The Gauge-Higgs Legacy of the LHC Run II
• CoDEx: Wilson coefficient calculator connecting SMEFT to UV theory
• Standard Model Higgs boson pair production in the $(b\bar{b})(b\bar{b})$ final state
• Higgs At Last
• Putting SMEFT Fits to Work
• Limits on Anomalous Couplings of the Higgs to Electroweak Gauge Bosons from LEP and LHC
• Anomalous Higgs Couplings
• Unitarity Constraints on Dimension-Six Operators
• Unitarity Constraints on Dimension-six Operators II: Including Fermionic Operators
• Incorporating doubly resonant $W^{\pm }$ data in a global fit of SMEFT parameters to lift flat directions
• Higgs Physics: It ain't over till it's over
• Validity of SMEFT studies of VH and VV Production at NLO
• Associated Production of Higgs Bosons and a Photon in High-Energy $e^{+}{e}^{-}$ Collisions
• Probing the Stop Sector of the MSSM with the Higgs Boson at the LHC
• Resolving the tensor structure of the Higgs coupling to $Z$-bosons via Higgs-strahlung
• Advancing MiNNLO${}_{\mathrm{PS}}$ to diboson processes: $Z\gamma$ production at NNLO+PS
• Probing Higgs boson couplings in H+$\gamma$ production at the LHC
• Automated EW corrections with isolated photons: $t\bar{t}\gamma$, $t\bar{t}\gamma \gamma$ and $t\gamma j$ as case studies
• Contact Interactions in Higgs-Vector Boson Associated Production at the ILC
• More light on Higgs flavor at the LHC: Higgs couplings to light quarks through $h+\gamma$ production
• Higgs-photon associated production at hadron colliders
• Constraining anomalous Higgs boson couplings to virtual photons
• Asking for an extra photon in Higgs production at the LHC and beyond
• NLO QCD predictions for $Z+\gamma$ + jets production with Sherpa
• Higgs-photon resonances
• Following the trail of new physics via VBF Higgs signal at the Large Hadron Collider
• Using Jet Substructure at the LHC to Search for the Light Higgs Bosons of the CP-Violating MSSM
• Probing Magnetic Moment Operators in $H\gamma$ Production and $H\to {\tau }^{+}{\tau }^{-}\gamma$ Rare Decay
• Shower it again, Pythia

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