Spin effects in vector meson production at LEP

Details Spin effects in vector meson production at LEP Spin effects in vector meson production at LEP

1998-02-26

arxiv.org/abs/hep-ph/9802435v1

Acta Phys.Polon. B29 (1998) 1469-1479

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figure; talk delivered at the Cracow Epiphany Conference on Spin Effects in Particle Physics and TEMPUS Workshop,

Scientific paper

Spin observables may reveal much deeper properties of non perturbative hadronic physics than unpolarized quantities. We discuss the polarization of hadrons produced in $e^+e^-$ annihilation at LEP. We show how final state $q \bar q$ interactions may give origin to non zero values of the off-diagonal element $\rho^{\,}_{1,-1}$ of the helicity density matrix of vector mesons: some predictions are given for $K^*, \phi, D^*$ and $B^*$ in agreement with recent OPAL data. We also discuss the relative amount of vector and pseudovector meson states and the probability of helicity zero vector states. Similar measurements in other processes are suggested.

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