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Probing Electroweak Precision Physics via boosted Higgs-strahlung at the LHC
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abstract
We study the process $pp \to Z(\ell^+ \ell^-)h(b\bar b)$ in the Standard Model Effective Field Theory (SMEFT) at high energies using subjet techniques to reconstruct the Higgs boson. We show that at high energies this process probes four directions in the dimension 6 EFT space, namely the operators that contribute to the four contact interactions, $hZ_\mu \bar{f}\gamma^\mu f$, where $f=u_L, u_R,d_L$ and $d_R$. These four directions are, however, already constrained by the $Z$-pole and diboson measurements at LEP. We show that by utilising the energy growth of this process in the SMEFT and the accuracy that can be achieved by using subjet techniques at the High Luminosity LHC, one can obtain bounds on these operators that are an order of magnitude better than existing LEP bounds.
Forward citations
Cited by 7 Pith papers
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Flavor constraints from $pp\to Vh$ and $pp\to VW$ at the LHC
LHC data on pp→Vh and pp→VW yield general-flavor SMEFT constraints that will become competitive with flavor tests of the Cabibbo-angle anomaly at the HL-LHC.
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Electroweak Scalar Effects Beyond Dimension-6 in SMEFT
One-loop dimension-eight SMEFT matching is derived for complex triplet and two-Higgs-doublet scalar extensions, and the dimension-eight terms are shown to matter for GigaZ electroweak precision projections.
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Constraints on standard model effective field theory for a Higgs boson produced in association with W or Z bosons in the H $\to\mathrm{b\bar{b}}$ decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS reports simultaneous constraints on six dimension-six SMEFT Wilson coefficients from VH, H to bb production at sqrt(s) = 13 TeV; all results agree with the standard model.
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Probing the Symmetric Higgs Portal with Di-Higgs Boson Production
Di-Higgs production at a future 100 TeV hadron collider can probe Higgs portal couplings of a stable scalar of order one for masses above half the Higgs mass.
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A tale of $Z$+jet: SMEFT effects and the Lam-Tung relation
Light-quark dipole operators cannot explain the observed violation of the Lam-Tung relation once SLC/LEP and LHC data are used to bound the Wilson coefficients.
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Improved BSM Sensitivity in Diboson Processes
Polarization-resolved W+W- and Zh analyses at a 3 TeV e+e- collider can constrain the dimension-6 operators O3W and OW to roughly c3W ~ 1e-2 and cW ~ 3e-3, about an order of magnitude better than HL-LHC or ILC projections.
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Fingerprinting New Physics with Effective Field Theories
A thesis compiling published SMEFT global fits, automated UV-model constraints, and ML-based unbinned observables, with projections for HL-LHC, FCC-ee, and CEPC.
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