Spin-dependent energy distribution of B-hadrons from polarized top decays considering the azimuthal correlation rate

Abstract

In our previous work, we studied the polar distribution of the scaled energy of bottom-flavored hadrons from polarized top quark decays $t(\uparrow )\to W^{+}+b(\to X_b)$, using two different helicity coordinate systems. Basically, the energy distributions are governed by the unpolarized, polar and azimuthal rate functions which are related to the density matrix elements of the decay $t(\uparrow )\to W^{+}+b$. Here we present, for the first time, the analytical expressions for the $\mathcal{O}({\alpha }_s)$ radiative corrections to the differential azimuthal decay rates of the partonic process $t(\uparrow )\to b+W^{+}(+g)$ in two helicity systems, which are needed to study the azimuthal distribution of the energy spectrum of the B-hadron produced in polarized top quark decays. Our predictions of the hadron energy distributions enable us to deepen our knowledge of the hadronization process and to determine the polarization states of top quarks.

References in corpus (3)

• Finite-Mass Effects on Inclusive B-Meson Hadroproduction
• Angular analysis of polarized top quark decay into B-mesons in two different helicity systems
• 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

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• Azimuthal polarization of polarized top quark in noncommutative standard model
• QCD analysis of light charged Higgs production through polarized top quark decay in two various frames
• Charged Higgs production from polarized top-quark decay in the 2HDM considering the general-mass variable-flavor-number scheme