{"arxiv_id":"hep-ph/0504055","title":"Four-Loop Singlet Contribution to the $\\rho$ Parameter","abstract":"We compute the four-loop contribution to the electroweak $\\rho$ parameter induced by the singlet diagrams of the $Z$-boson self-energy. The numerical impact on the weak mixing angle and the $W$-boson mass is small.","primary_cat":"hep-ph","cross_cats":[],"submitted_at":"2005-04-07T14:11:31+00:00","latest_version":2,"source":"arxiv","source_label":"arXiv","source_url":null,"has_pdf":true,"has_source":false,"verdict":"CONDITIONAL","confidence":"MODERATE","one_line_summary":"The four-loop singlet QCD contribution to the electroweak rho parameter is computed analytically and found to shift the W-boson mass by only about 0.175 MeV.","novelty_score":6.0,"correctness_risk":"low","formal_verification":"none","upvotes":0,"downvotes":0,"pith_score":0,"inbound_count":28,"_links":{"html":"https://pith.science/paper/hep-ph/0504055","verdict":"/api/v1/verdicts/hep-ph/0504055"}}