Associative charm photoproduction with circularly polarized photons

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Rekalo M., Tomasi-Gustafsson E.

PHYSICS LETTERS B, cilt.541, ss.101-107, 2002 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 541
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1016/s0370-2693(02)02190-1
  • Sayfa Sayıları: ss.101-107


We calculate the asymmetries for the processes gamma + p --> Lambda(c)(+) (Sigma(c)(+)) + (D-0) over bar and gamma + p --> Lambda(c)(+)(Sigma(c)(+)) + (D*) over bar, induced by circularly polarized photons on a polarized proton target in the framework of an effective Lagrangian model. We found large and positive values for the asymmetry induced by the z-component of the proton polarization, in a wide energy region, from threshold up to E-gamma = 70 GeV In the case of pseudoscalar meson photoproduction, the predictions are qualitatively model-independent. For D*-photoproduction, there is a strong dependence of the asymmetries on NLambda(c)D(D*)-coupling constants. (C) 2002 Elsevier Science B.V. All rights reserved.