PoS(HEP2005)078 Study of the gg → Hjj background to Weak Boson Fusion Higgs production Vittorio Del Duca INFN Sezione di Torino and Dipartimentodi Fisica Teorica, v. P. Giuria 5, Torino, Italy E-mail: delduca@to.infn.it Michelangelo L. Mangano CERN, PH Department, TH Unit, 1211 Geneva 23, Switzerland E-mail: michelangelo.mangano@cern.ch Mauro Moretti Dipartimento di Fisica Università di Ferrara and INFN, v. Saragat 1, I-44100 Ferrara, Italy E-mail: mauro.moretti@fe.infn.it Fulvio Piccinini * INFN Sezione di Pavia and Dipartimento di Fisica Nucleare e Teorica, v. A. Bassi 6, I-27100 Pavia, Italy E-mail: fulvio.piccinini@pv.infn.it Roberto Pittau Dipartimento di Fisica Teorica andINFN Sezione di Torino v. P. Giuria 5, Torino, Italy E-mail: roberto.pittau@to.infn.it Antonio D. Polosa INFN Sezione di Roma, Italy E-mail: antonio.polosa@cern.ch We analyse some distributions relevant to the discrimination between Higgs production via weak- boson fusion and via gluon fusion. By using a matrix element calculation merged with the HERWIG parton shower, we find that, contrary to previous studies, higher order corrections pre- serve a set of correlations among the leading jets, characteristic of the two production processes. International Europhysics Conference on High Energy Physics July 21st - 27th 2005 Lisboa, Portugal * Speaker. c  Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/