Model Independent Bounds on Kinetic Mixing

TL;DR

This paper derives model-independent bounds on the kinetic mixing parameter of new Abelian vector bosons across a wide mass range, using existing e+e- experimental data, establishing limits that are unaffected by additional interactions.

Contribution

It provides the first comprehensive, model-independent limits on kinetic mixing for vector bosons from 1 GeV to 1 TeV based on existing experimental data.

Findings

Kinetic mixing parameter epsilon < 0.03 for most masses

Limits are independent of additional interactions

Applicable across 1 GeV to 1 TeV mass range

Abstract

New Abelian vector bosons can kinetically mix with the hypercharge gauge boson of the Standard Model. This letter computes the model independent limits on vector bosons with masses from 1 GeV to 1 TeV. The limits arise from the numerous e+e- experiments that have been performed in this energy range and bound the kinetic mixing by epsilon < 0.03 for most of the mass range studied, regardless of any additional interactions that the new vector boson may have.