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Probing a Quarkophobic W^′ at the High-Luminosity LHC via Vector Boson Fusion and Lorentz-Equivariant Point Cloud Learning

2025/02/23 by Umar Sohail Qureshi, A. Gurrola, Qureshi, U. S. +3
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Particle Detector Development and Performance

paper · pdf · doi:10.48550/arxiv.2502.16630

Abstract

The addition of a heavy charged vector gauge boson W^′ to the Standard Model (SM) with negligible quark couplings ("quarkophobic") and triple gauge couplings can address issues with the SM, such as the B-meson anomalies and recent discrepancies in the W boson mass measurements. We present a phenomenology study probing W^′ production through weak boson fusion in proton-proton collisions at the Large Hadron Collider. We operate under a simplified model with a large W^′ decay width and consider final states with two jets, large missing transverse momentum, and one light lepton. Notably, we use point cloud learning for the first time in a BSM search\unicodex2014specifically, a novel Lorentz-Equivariant Geometric Algebra Transformer\unicodex2014providing significant improvement in signal sensitivity compared to traditional methods.

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