W boson mass tension caused by its right-handed gauge coupling at high energies?

The CDF collaboration's recent high-precision measurement of the W mass is in 7.0σ disagreement with the Standard Model expectation. This tension will be relieved if the W boson has a non-trivial right-handed gauge coupling at high energies. At TeV scales, the SM gauge symmetric four-fermion in...

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Veröffentlicht in:Nuclear physics. B 2022-12, Vol.985, p.115992, Article 115992
1. Verfasser: Xue, She-Sheng
Format: Artikel
Sprache:eng
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Zusammenfassung:The CDF collaboration's recent high-precision measurement of the W mass is in 7.0σ disagreement with the Standard Model expectation. This tension will be relieved if the W boson has a non-trivial right-handed gauge coupling at high energies. At TeV scales, the SM gauge symmetric four-fermion interactions induce a right-handed gauge coupling, and SM fermions compose massive composite particles. We investigate the top-quark mass produced by spontaneous symmetry breaking and compute the W and Z boson propagators and decays. The right-handed coupling corrections to their masses and widths are consistent with experimental measurements. We discuss how SM gauge bosons and composite particles can restore parity-preserving gauge symmetries at TeV scales.
ISSN:0550-3213
1873-1562
DOI:10.1016/j.nuclphysb.2022.115992