Acta Physica Polonica B

Vol. 33, No. 11, November 2002, page 3529


Diffractive \rho Meson Electroproduction at High Q2 and High |t|

Xavier Janssen

The electroproduction of \rho mesons is studied at HERA with the H1 detector at high Q2 and high |t|. Cross sections are measured as a function of Q2, W and t. The W dependence of the \gamma * p cross section is observed to increase with Q2 from values compatible with soft Pomeron exchange at low Q2 to a hard dependence at large Q2. Spin density matrix elements are measured and their dependence is compared with a two gluon exchange model.

PACS numbers: 13.60.Le


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