Orateur
Yuriy Onishchuk
Description
The production of the excited charm mesons D1(2420)0 and D*2(2460) in ep
collisions was measured with the ZEUS detector at HERA using an integrated
luminosity of 373 pb-1. The masses, widths and helicity parameters of these
resonances were determined and compared with previous measurements, with
theoretical expectations and with published ZEUS results of an independent
sample with an integrated luminosity of 126 pb-1. The measured D01 width is
found to be above the world average value in both cases. The measured D01
helicity parameter allows for some mixing of S- and D-waves in its decay
to D* pi; however the result is also consistent with the prediction for a
pure D-wave decay.
Auteur principal
Prof.
Collaboration ZEUS
(Tel Aviv University)
