Vector- and Scalar-Bilepton Pair Production in Hadron Colliders

TL;DR

This paper analyzes the production of vector and scalar bilepton pairs at hadron colliders within the 3-3-1 model, showing that vector bileptons have significantly higher production rates and can be detected at the LHC.

Contribution

It provides the first detailed calculation of vector and scalar bilepton pair production cross sections, including all relevant channels, within the minimal 3-3-1 model framework.

Findings

Vector bilepton production cross section is 1000 times larger than scalar production at 7 and 14 TeV.

LHC can potentially detect bileptons based on predicted event rates.

Distinct invariant mass and transverse momentum distributions help identify bilepton nature.

Abstract

We study the double-charged vector-bilepton pair production and double-charged scalar-bilepton pair production {\it via} $p + p \longrightarrow Y^{++} + Y^{--} + X$ and $p + p \longrightarrow S_1^{++} + S_1^{--} + X$, where $Y$ and $S_1$ are vector and scalar bileptons respectively, in the framework of the minimal version of the 3-3-1 model. We compute the photon, $Z$, and $Z^\prime$ s-channel contributions for the elementary process of bilepton scalar pair production, and to keep the correct unitarity behavior for the elementary $q \bar q$ interaction, we include the exotic quark t-channel contribution in the vector-bilepton pair production calculation. We explore a mass range for $Z^\prime$ and we fix the exotic quark mass within the experimental bounds. In this model, the vector-bilepton mass is directly related to $M_{Z^\prime}$ and we consider scalar mass values around the vector-bilepton mass. We show that the total cross section for vector-bilepton production is 3 orders of magnitude larger than for scalar pair production for $\sqrt s= 7$ TeV and 14 TeV and we obtain the number of events for the proposed LHC luminosities as a function of the bilepton mass. In addition we present some invariant mass and transverse momentum distributions. When comparing these distributions we observe quite different behavior providing the determination of the bilepton nature. We conclude that one can disentangle the production rates and that the LHC can be capable of detecting these predicted particles as a signal for new physics.