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Longitudinal contribution to the alignment polarization of quarks produced in e+ e−-annihilation: an O(αs) effect

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Zeitschrift für Physik C Particles and Fields

Abstract

We calculate the longitudinal contribution to the alignment polarization P l of quarks produced in e + e − annihilation. In the Standard Model, the longitudinal alignment polarization vanishes at the Born term level and thus receives its first non-zero contribution from the O(αs) tree graph process. We provide analytical and numerical results for the longitudinal alignment polarization of massless and massive quarks, in particular for the recently discovered top quark.

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Authors and Affiliations

  1. Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, D-55099, Mainz, Germany

    S. Groote & J. G. Körner

  2. Departament de Física Teòrica, Universitat de València and IFIC, Centre Mixte Universitat València—CSIC, C/ Dr. Moliner, 50, E-46100, Burjassot, València, Spain

    M. M. Tung

Authors
  1. S. Groote
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  2. J. G. Körner
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  3. M. M. Tung
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Additional information

Supported in part by the BMFT, FRG, under contracts 06MZ730 and 06MZ566, and by HUCAM, EU, under contract CHRX-CT94-0579

Feodor-Lynen Fellow

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Groote, S., Körner, J.G. & Tung, M.M. Longitudinal contribution to the alignment polarization of quarks produced in e+ e−-annihilation: an O(αs) effect. Z Phys C - Particles and Fields 70, 281–289 (1996). https://doi.org/10.1007/s002880050105

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