http://cp3.irmp.ucl.ac.be:80/PAI CP3 Calendar - Week of 4/12/2026 http://cp3.irmp.ucl.ac.be:80/PAI/day.php?getdate=20260414&cal=CP3 Tue Apr 14 2026 4:15 PM: Minimality versus naturalness: How many new particles do we need?