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- W4224980564 abstract "Georgi-Machacek model can hardly account for the new CDF II data on W-boson mass in its original form. As anticipated, unless additional tree level $SU(2)_c$ custodial symmetry breaking effects are non-negligible, the new physics contributions to $Delta m_W$ is always very small. Our numerical results show that ordinary GM model can contribute to $Delta m_W$ a maximal amount $0.0012$ GeV, which can not explain the new CDF II data on W boson mass. We propose to introduce small misalignment among the triplet VEVs to increase $Delta m_W$, which can reach 0.06 GeV for $v_xi-v_chisim 6$ GeV, marginally explain the new data in $2sigma$ range. We also propose to extend the GM model with low scale RH neutrino sector, which can adopt the leptogenesis mechanism and act as a large $SU(2)_c$ breaking source because of its correlation with $h_{ij}$. With low scale RH neutrino mass scale of order $10^2sim 10^4$ TeV, the new physics contributions to $Delta m_W$ can reach $0.03$ GeV. Combining both small $SU(2)_c$ breaking effects, the small misalignment among the triplet VEVs and large $h_{ij}$ couplings, the $1sigma$ range of CDF II data on W boson mass can be obtained even for small splitting among the triplet VEVs with $v_xi-v_chiapprox 1 $ GeV." @default.
- W4224980564 created "2022-04-28" @default.
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- W4224980564 date "2022-04-12" @default.
- W4224980564 modified "2023-10-17" @default.
- W4224980564 title "Explaining The New CDF II W-Boson Mass Data In The Georgi-Machacek Extension Models" @default.
- W4224980564 doi "https://doi.org/10.48550/arxiv.2204.05760" @default.
- W4224980564 hasPublicationYear "2022" @default.
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