Apr 26 – 30, 2009
Palacio de Congresos de Madrid
Europe/Zurich timezone

Measurement of -onium polarization in D0

Not scheduled
Palacio de Congresos de Madrid

Palacio de Congresos de Madrid

Paseo de la Castellana, 99 28046 Madrid España


Valentin Kuzmin


We present a study of the polarization of prompt J/Psi using a 1.3 fb-1 data sample collected by the D0 experiment in 2002�2006 during Run II of the Fermilab Tevatron Collider. The polar helicity angle distribution was compared in different pT and rapidity intervals with the predicted distribution using the polarization parameter alpha = (sigma_T - 2sigma_T )/(sigma_T + 2sigma_L) where sigma_T and sigma_L are the transverse and longitudinal polarized components of the cross section.

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