Angular analysis of bottom-flavored hadron production in semileptonic decays of polarized top quarks

We study the inclusive production of bottom-flavored hadrons from semileptonic decays of polarized top quarks at next-to-leading order in QCD using fragmentation functions recently determined from a global fit to e+e− data. We provide the relevant differential decay widths at parton level in analyti...

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Bibliographic Details
Published in:Physical review. D 2021-02, Vol.103 (3), Article 034015
Main Authors: Kniehl, Bernd A., Moosavi Nejad, S. Mohammad
Format: Article
Language:English
Subjects:
Decay
Hadrons
Large Hadron Collider
Particle collisions
Partons
Protons
Quantum chromodynamics
Quarks
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Summary:We study the inclusive production of bottom-flavored hadrons from semileptonic decays of polarized top quarks at next-to-leading order in QCD using fragmentation functions recently determined from a global fit to e+e− data. We provide the relevant differential decay widths at parton level in analytic form. These results fill an important gap in the theoretical interpretation of recent measurements of the top-quark polarization and the t¯t spin correlations using dilepton final states in proton-proton collisions at the CERN Large Hadron Collider. As an illustration, we study the distributions in the scaled bottom-hadron energy of the polarized-top-quark decay widths for different W-boson helicities.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.103.034015