Off-diagonal helicity density matrix elements for vector mesons produced in polarized e+e- processes
High Energy Physics - Phenomenology
2021-10-19 v1
Abstract
Final state quark-antiquark interactions give origin to non zero values of the off-diagonal element rho_{1,-1} of the helicity density matrix of vector mesons produced in e+e- annihilations, as confirmed by recent OPAL data on Phi, D^* and K^*'s. New predictions are given for rho_{1,-1} of several mesons produced at large x_E and small p_T -- i.e. collinear with the parent jet -- in the annihilation of polarized e+ and e-; the results depend strongly on the elementary dynamics and allow further non trivial tests of the Standard Model.
Cite
@article{arxiv.hep-ph/9904205,
title = {Off-diagonal helicity density matrix elements for vector mesons produced in polarized e+e- processes},
author = {M. Anselmino and M. Bertini and F. Caruso and F. Murgia and P. Quintairos},
journal= {arXiv preprint arXiv:hep-ph/9904205},
year = {2021}
}
Comments
LaTeX, 20 pages, 6 ps figures, uses epsfig.sty