Abstract
We study the potential of future Parity-Violating Electron Scattering (PVES) data to probe the parameter space of the Standard Model Effective Field Theory (SMEFT). We contrast the constraints derived from Drell-Yan data taken at the Large Hadron Collider (LHC) with projections of the planned PVES experiments SoLID and P2. We show that the PVES data can complement the bounds set by the LHC data in the dimension-6 operator space since it probes different combinations of operators than Drell-Yan. The lower characteristic energy of P2 and SoLID also helps disentangle effects of dimension-6 and dimension-8 operators that are difficult to resolve with LHC Drell-Yan data alone.
Highlights
No conclusive sign of physics beyond the Standard Model (SM) has been observed at either the Large Hadron Collider (LHC) or in other experiments
In this work we have studied the potential impact that future parity-violating electron scattering (PVES) experiments SoLID and P2 will have on disentangling degeneracies in SM effective field theory (SMEFT) fits, and in separating dimension-six from dimension-eight effects
Both experiments can discriminate between combinations of dimension-six operators that cannot be resolved by existing Drell-Yan data at the LHC
Summary
No conclusive sign of physics beyond the Standard Model (SM) has been observed at either the Large Hadron Collider (LHC) or in other experiments. Recent work has been devoted to performing a global, simultaneous fit of all data available [17,18,19,20,21,22,23,24,25] Most of these global fits have focused on the truncation of the SMEFT expansion to dimension-six operators. Another issue to address is the sensitivity of fits to dimension-eight and higher operators. Their effects should be suppressed, but since many measurements at the LHC probe high energies this assumption must be tested. We show that PVES experiments can be used to lift flat directions in the space of dimension-six operators when combined with Drell-Yan data.
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