2025/03/03 by Saiyad Ashanujjaman, Ashanujjaman, Saiyad, Andreas Crivellin +5 · 1 citation
Computer Science · Engineering · Physics and Astronomy · #Distributed and Parallel Computing Systems #Superconducting Materials and Applications #Particle physics theoretical and experimental studies
paper · doi:10.48550/arxiv.2503.01974
Vector-boson fusion production of new Higgs bosons decaying into pairs of electroweak gauge bosons (W^± W^±, WZ and ZZ) is a smoking-gun signature of the Georgi-Machacek (GM) Model. Notably, ATLAS has observed a 3.3σ excess in W^± W^± at ≈ 450 GeV and a 2.8σ excess in the WZ channel at ≈ 375 GeV, while CMS reported weaker-than-expected limits at these masses. However, the canonical custodial-symmetric GM Model cannot accommodate these signals, as it predicts mass degeneracy among the new gauge-philic Higgs bosons. To overcome this obstacle, we consider a generalized version of the GM Model without the custodial SU(2)C symmetry in the scalar potential. In the limit of small mixing among the Higgs bosons, the W^± W^± and WZ excesses can be explained by the doubly and singly-charged Higgs bosons originating primarily from the Y=1 triplet, while respecting the bounds from ZZ searches. Furthermore, the neutral Higgs boson mostly contained in the Y=0 triplet can account for the excess at ≈ 152 GeV in associated di-photon production, while being consistent with constraints from vacuum stability and the Standard Model Higgs signal strength measurements.