NLO and NNLO corrections to polarized top quark decays

Abstract

We present partial results on NLO and NNLO QCD, and NLO electroweak corrections to polarized top quark decays. In parallel we derive positivity bounds for the polarized structure functions in polarized top quark decays and check them against the perturbative corrections to the structure functions.

7 pages, 4 figures, contribution to "QCD@Work 2018", International Workshop on QCD Theory and Experiment. 25-28 June 2018. Matera, Italy

References in corpus (5)

• Probing the $Wtb$ vertex structure in $t$-channel single-top-quark production and decay in $pp$ collisions at $\sqrt{\mathrm{s}}=8$ TeV with the ATLAS detector
• Azimuthal correlation between the $({\vec{p}}_l,{\vec{p}}_{X_b})$ and $({\vec{p}}_l,{\vec{P}}_t)$ planes in the semileptonic rest frame decay of a polarized top quark: An $O({\alpha }_s)$ effect
• NNLO QCD corrections to the polarized top quark decay $t(\uparrow )\to X_b+W^{+}$
• $T$-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 $t(\uparrow )\to X_b+{\ell }^{+}+{\nu }_{\ell }$
• Positivity bound on the imaginary part of the right-chiral tensor coupling $g_R$ in polarized top quark decay