Spin Alignment of Vector Meson in High Energy Reactions

Details Spin Alignment of Vector Meson in High Energy Reactions Spin Alignment of Vector Meson in High Energy Reactions

2002-04-24

arxiv.org/abs/hep-ph/0204276v1

Int.J.Mod.Phys. A18 (2003) 1491-1496

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages,3 figures, Talk given at 3rd Circum-Pan-Pacific Symposium on "High Energy Spin Physics", Beijing, China, Oct.8-13, 200

Scientific paper

10.1142/S0217751X03014976

The recent data on the polarization of vector meson at LEP show that the vector mesons favor the helicity zero state. We calculate the helicity density matrix of vector meson which contains a polarized fragmenting quark by adding the spin of the fragmenting quark and that of the antiquark created in the fragmentation. The data at LEP imply a significant polarization for the antiquark in the opposite direction as that of the fragmenting quark. We extend the calculations to other reactions and make predictions for vector mesons in deeply inelastic lepton-nucleon scatterings and polarized $pp$ collisions.

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