Vector Polarization in Reactions with Spin-1 Particles

Spin Alignment of Vector Meson in High Energy Reactions

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 opp...

Covariant Polarization Bases for Spin = l / 2 , 1 , 3 / 2 Particles and Their Use *

?A simple method is presented for evaluating transition amplitudes between massive states with spin = l/2, 1 and definite polarization. The spin 3/2 case is also briefly r discussed. Applications to testing the decay and production of vector bosons are considered. Submitted to Nuclear Physics B *Work supported by the Department of Energy, contract DEAC03-76SF00515, and in part by the Instituto ...

Spin-dependent manipulating of vector beams by tailoring polarization

We examine the spin-dependent manipulating of vector beams by tailoring the inhomogeneous polarization. The spin-dependent manipulating is attributed to the spin-dependent phase gradient in vector beams, which can be regarded as the intrinsic feature of inhomogeneous polarization. The desired polarization can be obtained by establishing the relationship between the local orientation of polariza...

Induced spin polarization of copper spin 1/2 molecular layers

Semiclassical expectation values for relativistic particles with spin 1 / 2

For relativistic particles with spin 1/2, which are described by the Dirac equation, a semiclassical trace formula is introduced that incorporates expectation values of observables in eigenstates of the Dirac-Hamiltonian. Furthermore, the semiclassical limit of an average of expectation values is expressed in terms of a classical average of the corresponding classical observable. E-mail address...