Spin-Momentum Correlations in Inclusive Semileptonic Decays of Polarized $Λ_b$ Baryons

Details Spin-Momentum Correlations in Inclusive Semileptonic Decays of Polarized $Λ_b$ Baryons Spin-Momentum Correlations in Inclusive Semileptonic Decays of Polarized $Λ_b$ Baryons

1998-10-28

arxiv.org/abs/hep-ph/9810511v2

Phys.Rev.D60:014021,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 figures, more numerical results added; version published as Phys. Rev. D60, 014021 (1999)

Scientific paper

10.1103/PhysRevD.60.014021

We consider spin-momentum correlations between the spin of the bottom baryon $\Lambda_{\mathrm{b}}$ and the momenta of its decay products in its inclusive semileptonic decay. We define several polar and azimuthal spin-momentum correlation measures in different event coordinate systems. The values of the spin-momentum correlation measures are calculated up to ${\cal O}(1/m_b^2)$ using the standard OPE und HQET methods. Some of the measures turn out to be sufficiently large to make them good candidates for a determination of the polarization of the $\Lambda_{\mathrm{b}}$ in e.g. $\mathrm{Z}$ decays.

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