2024/12/26 by N. Chamoun, Chamoun, Nidal, K. Ezzat +5
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2412.19269
openalex publication_date 2024/12/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the collider phenomenology of the B-L extension of the Standard Model (BLSM), focusing on the production and decay of a heavy neutral gauge boson (\( Z' \)) at the Large Hadron Collider (LHC). In this framework, the \( Z' \) can decay into pairs of heavy right-handed neutrinos (\( νR \)), which subsequently decay into charged leptons and \( W \) bosons. These processes give rise to three distinctive final states: (i) two leptons plus four jets (\( 2ℓ + 4j \)), (ii) four leptons plus missing transverse energy (\( 4ℓ + MET \)), and (iii) three leptons plus two jets and MET (\( 3ℓ + 2j + MET \)). % To enhance signal sensitivity and suppress Standard Model backgrounds, we employ multivariate analysis techniques based on Boosted Decision Trees (BDTs), as well as selection optimizations using the XGBOOST framework. The classifiers are trained on kinematic observables sensitive to the masses of the \( Z' \) and \( νR \). We demonstrate that all three final states offer significant discovery potential for both the \( Z' \) and heavy \( νR \) at the High-Luminosity LHC. Our results highlight the testability of the BLSM at current and future collider experiments, and provide a promising avenue for probing the origin of neutrino masses and the baryon asymmetry of the Universe.