Positivity bound on the imaginary part of the right-chiral tensor coupling $g_R$ in polarized top quark decay

Abstract

We derive a positivity bound on the right-chiral tensor coupling Im $g_R$ in polarized top quark decay by analyzing the angular decay distribution of the three-body polarized top quark decay $t(\uparrow )\to b+{\ell }^{+}+{\nu }_{\ell }$ in NLO QCD. We obtain the bound $-0.0420\le$ Im $g_R\le 0.0420$.

arXiv comment7 pages, 1 figure

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Cited by in corpus (3)

• $T$-odd correlations in polarized top quark decays in the sequential decay $t(\uparrow )\to X_b+W^{+}(\to {\ell }^{+}+{\nu }_{\ell })$ and in the quasi three-body decay $t(\uparrow )\to X_b+{\ell }^{+}+{\nu }_{\ell }$
• Constraints on the anomalous $Wtb$ couplings from $B$-physics experiments
• NLO and NNLO corrections to polarized top quark decays