BSM Primary Effects: The complete set of predictions from the dimension-6 BSM Lagrangian

TL;DR

This paper introduces BSM Primary effects as a comprehensive, experimentally grounded parameterization of dimension-6 beyond Standard Model effects, enabling efficient constraints on heavy new physics from low-energy measurements.

Contribution

It provides a complete set of primary effects related to Higgs, gauge couplings, and Z-pole measurements, establishing their correlations and theoretical expectations.

Findings

BSM Primary effects form a complete, non-redundant set of dimension-6 interactions.

Explicit correlations among BSM effects are derived.

Theoretical estimates for the size of primaries are discussed.

Abstract

We present a physical parameterization of the leading effects beyond the SM (BSM), that give us, at present, the best way to constrain heavy new-physics at low-energies. We call these effects that constrain all possible interactions at the dimension 6 level, BSM Primary effects; there are 8 primaries related to Higgs physics, 3 related to Triple Gauge Couplings and 7 related to Z- pole measurements at LEP. Starting from these experimentally measurable deformations (and not operators), we construct the dimension 6 Lagrangian in a bottom up way. We, thus, show that other BSM effects are not independent from the primary ones and we provide the explicit correlations. We also discuss the theoretical expectation for the size of these BSM primaries in some well-motivated BSM theories.