QCD corrections to decays of polarised charm and bottom quarks

Details QCD corrections to decays of polarised charm and bottom quarks QCD corrections to decays of polarised charm and bottom quarks

1993-12-08

arxiv.org/abs/hep-ph/9312249v1

Phys.Rev.Lett.73:384-387,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

Karlsruhe Univ. preprint TTP 93-32, Mainz preprint MZ-TH/93-35, 6 pages, Latex 3 figures included in postscript file figures.p

Scientific paper

10.1103/PhysRevLett.73.384

Distributions of charged leptons in semileptonic $\Lambda_c$ and $\Lambda_b$ decays can be used as spin analysers for the corresponding charm and bottom quarks. QCD corrections to the energy spectra of charged leptons have been given in the literature as well as the corrections to the angular dependence for polarised up-type quarks. The analogous formulae are derived also for polarised down-type quarks. These results are applied to the decays of polarised charm and bottom quarks. The corrections to the asymmetries are found to be small for charm decays. For bottom decays they exhibit a non-trivial dependence on the energy of the charged lepton.

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