SGV 3.0 - a fast detector simulation

Understand

The need for fast simulation programs is emphasised, both in terms of the need for "rapid response" to new results - in particular from the LHC - and new theoretical ideas, and in terms of how to cope with multi-billion simulated event samples.

• The latter would arise both from the need to be able to simulate significantly more events than expected in the real data, also for high cross-section processes, and the need to scan multi-parameter theories.
• The {\it Simulation \`a Grande Vitesse}, SGV, is presented, and is shown to be able to address these issues.
• The tracking performance of SGV is shown to reproduce very closely that of the full simulation and reconstruction of the ILD concept.