Proceedings of the Conference on Statistical Problems for Particle Physics, Astrophysics and Cosmology (PHYSTAT2003)

PHYSTAT2003 was a Conference held at SLAC on September 8th-11th, 2003. Its theme was ''Statistical Problems in Particle Physics, Astrophysics and Cosmology''. It followed on from the Confidence Limits Workshops held at CERN and Fermilab in 2000, and a conference in 2002 at the Institute for Particle Physics Phenomenology in Durham, UK. PHYSTAT2003 differed from the earlier meetings in two important respects. While the first three meetings had been attended largely by particle physicists, at SLAC there was also involvement of astrophysicists and cosmologists. Secondly, the SLAC meeting really benefited from a strong presence of statisticians. They enhanced the usefulness of the Conference in many ways: they were involved in the planning stage, gave invited and contributed talks, and were simply ''there'' to discuss statistical issues with physicists in the breaks between the sessions.