DESY-HERA. Measurement of the t dependence of spin density matrices in a study of the helicity structure of diffractive electroproduction of RHO0 mesons in the process E+ P --& gt; E+ RHO0 X, where X is is either a proton or a baryonic system of mass much lower than the photon-proton c.m. energy W. The data, which cover the Q**2 range 2.5 to 60 GeV**2, the W range 40 to 120 GeV and the TP (=T-Tmin) range 0 to 3 GeV**2, come from the 1997 HERA running period with 27.5 GeV positrons colliding with 820 GeV protons and an integrated luminosity of 6.0 pb-1.
|Date made available||2002|
|Publisher||University of Manchester|