Four Fermion Contact Terms in Charged Current Processes and Large Extra Dimensions

TL;DR

This paper derives bounds on four-fermion contact interactions from collider data and applies these to constrain the compactification scale in theories with large extra dimensions, finding M_c >= 3.3 TeV.

Contribution

It provides new bounds on four-fermion contact terms from HERA and TEVATRON data and applies these to large extra dimension models.

Findings

Bounds on four-fermion contact terms from collider data

Lower bound on compactification radius M_c >= 3.3 TeV

Comparison with existing bounds in literature

Abstract

We study the bounds that can be obtained on four-fermion contact terms from the experimental data for (e+ p -> \bar{nu} X) obtained at HERA and (p \bar{p} -> e \nu), measured at TEVATRON. We compare these bounds with the ones available in the literature. Finally, we apply these results to study the compactification radius in theories with large extra dimensions and we obtain the bound M_c >= 3.3 TeV.