Contributions to $Z^0$ decays from a X17 extension of the Standard Model

TL;DR

This paper explores a Born-Infeld extension involving the X17 boson within the $U(1)_{B-L}$ Standard Model extension, analyzing its impact on $Z^0$ decays and comparing predictions with experimental data.

Contribution

It introduces a Born-Infeld contribution linked to the X17 boson in the $U(1)_{B-L}$ extension of the Standard Model, providing new theoretical insights.

Findings

Calculated decay widths for $Z^0$ to 3$X$ and 3$\gamma$ processes

Compared theoretical predictions with NA64 and ATLAS experimental data

Identified potential signatures of the X17 boson in $Z^0$ decays

Abstract

The present work proposes a Born-Infeld contribution to the $U(1)_{B-L}$ extension of the Standard Model, where it is introduced associated to the X17 neutral boson. The decay width of the $Z^0$ decay into 3$X$ and 3$\gamma$ processes are computed, based on NA64 and ATLAS experiments data.