Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-05-06
Phys.Lett. B438 (1998) 347-352
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 10 pages, 1 postscript figure, uses epsfig.sty. Revised version, to be published on Phys. Lett. B. Some statements adde
Scientific paper
10.1016/S0370-2693(98)00978-2
Final state interactions in quark fragmentation may give origin to non zero values of the off-diagonal element rho_(1,-1) of the helicity density matrix of vector mesons V produced in current jets, with a large energy fraction x_E; the value of rho_(1,-1)(V) is related to the hard constituent dynamics and tests unusual properties of it. Some recent data on phi, K^* and D^* produced in e^+ e^- annihilations at LEP show such effects. Predictions are given here for rho_(1,-1) of heavy mesons produced in nucleon-nucleon, gamma-nucleon and lepton-nucleon interactions.
Anselmino Mauro
Bertini Marc
Murgia Francesco
Pire Bernard
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