Heavy new physics four-fermion operators can bias small-angle Bhabha luminosity calibration at future e+e- colliders at the level of the design precision, and luminosity-independent Bhabha asymmetries can constrain the operators and remove the bias.
New Physics Through Drell Yan SMEFT Measurements at NLO
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abstract
Drell Yan production is a sensitive probe of new physics and as such has been calculated to high order in both the electroweak and QCD sectors of the Standard Model, allowing for precision comparisons between theory and data. Here we extend these calculations to the Standard Model Effective field theory (SMEFT) and present the NLO QCD and electroweak contributions to the neutral Drell Yan process that are linear in the Wilson coefficients of the SMEFT theory.
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New Physics contamination to precision luminosity measurements at future $e^+e^-$ colliders
Heavy new physics four-fermion operators can bias small-angle Bhabha luminosity calibration at future e+e- colliders at the level of the design precision, and luminosity-independent Bhabha asymmetries can constrain the operators and remove the bias.