Off-diagonal helicity density matrix elements for vector mesons produced in polarized e+e- processes
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Data
1999-12-01
Autores
Anselmino, M.
Bertini, M.
Caruso, F.
Murgia, F.
Quintairos, P. [UNESP]
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Final-state qq̄ interactions give origin to nonzero values of the off-diagonal element ρ1,-1 of the helicity density matrix of vector mesons produced in e+e- annihilations, as has been confirmed by recent OPAL data on φ, D*, and K*. New predictions are given for ρ1,-1 of several mesons produced at large XE and small pT - 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 nontrivial tests of the standard model.
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European Physical Journal C, v. 11, n. 3, p. 529-537, 1999.