{"paper":{"title":"Transverse tau polarization in inclusive $\\bar B\\to \\tau \\bar\\nu X$ decays","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Yuval Grossman, Zoltan Ligeti","submitted_at":"1994-09-26T22:23:21Z","abstract_excerpt":"We calculate, in the framework of multi Higgs doublet models, the $CP$ violating transverse tau polarization, $P_\\perp$, in inclusive semileptonic $B$ meson decays. We find that $P_\\perp$ diverges at ${\\cal O}(1/m_b^2)$ of the heavy quark expansion. We discuss the physical reasons for this divergence and show how to regularize it. We find large $1/m_b^2$ corrections that can suppress the $CP$ asymmetry by as much as 30\\%. The maximal allowed asymmetry is $a_{CP}\\sim0.34$. We discuss how the allowed range is expected to change in the future."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9409418","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}