ηc production associated with light hadrons at the B-factories and the future Super B-factories

We present a complete study of the associated production of the eta(c) meson with light hadrons in e(+)e(-) collisions at the B-factory energy, which is demonstrated to be one of the best laboratories for testing the colour-octet (CO) mechanism. The colour-singlet contributions are evaluated up to O(alpha(2)alpha(3)(S)), while the CO ones are evaluated up to O(alpha(2)alpha(2)(S)). For the first time, the angular distribution of the S-1(0)[8] production is studied at QCD next-to-leading order. We find that the S-1(0)[8] channel dominates the total cross section, while the P-1(1)[8] one exhibits its importance in the angular distribution, which turns out to be downward going with respect to cos theta. This can be considered as the most distinct signal for the CO mechanism.