Heavy neutrinos and the $pp\to lljj$ CMS data

TL;DR

This paper interprets CMS $pp o lljj$ excess data using the Minimal Left Right Symmetric Model, accounting for CP phases and non-degenerate heavy neutrino masses, providing a potential hint of heavy neutrinos in right-handed currents.

Contribution

It offers a natural explanation for CMS excess data within the MLRSM, including the observed lepton signal ratio and flavor suppression, considering CP phases and neutrino mass differences.

Findings

CMS excess can be explained by heavy neutrinos in MLRSM

The model reproduces the observed lepton signal ratio (14:1)

Muon suppression relative to electrons aligns with data

Abstract

We show that the excess in the $pp \to ee jj$ CMS data can be naturally interpreted within the Minimal Left Right Symmetric model (MLRSM), keeping $g_L = g_R$, if CP phases and non-degenerate masses of heavy neutrinos are taken into account. As an additional benefit, a natural interpretation of the reported ratio (14:1) of the opposite-sign (OS) $pp\to l^\pm l^\mp jj$ to the same-sign (SS) $pp\to l^\pm l^\pm jj$ lepton signals is possible. Finally, a suppression of muon pairs with respect to electron pairs in the $pp \to lljj$ data is obtained, in accordance with experimental data. If the excess in the CMS data survives in the future, it would be a first clear hint towards presence of heavy neutrinos in right-handed charged currents with specific CP phases, mixing angles and masses, which will have far reaching consequences for particle physics directions.