Colloquium by Jonathan Feng - Fermilab Center for Particle ...
Colloquium by Jonathan Feng - Fermilab Center for Particle ...
Colloquium by Jonathan Feng - Fermilab Center for Particle ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
LEP’S COSMOLOGICAL LEGACY<br />
Gauge Hierarchy requires<br />
Higgs new<br />
particle<br />
Higgs<br />
Precision EW excludes<br />
SM<br />
SM<br />
SM SM<br />
• Simple solution: impose a discrete parity, so all interactions<br />
require pairs of new particles. This also makes the lightest<br />
new particle stable:<br />
LEP constraints ↔ Discrete Symmetry ↔ Stability<br />
Cheng, Low (2003); Wudka (2003)<br />
• The result: dark matter is easier to explain than no dark<br />
matter, and the WIMP paradigm is more natural than ever<br />
be<strong>for</strong>e, leading to a proliferation of candidates<br />
23 Mar 11 <strong>Feng</strong> 11<br />
new<br />
particle