ILC – LHC Synergy

1. ILC – LHC Synergy Main briefing The high energy of the LHC will establish that new phenomena at the Terascale exist. The precision studies of the ILC will enable us to interpret these new discoveries. In every scenario, the LHC discoveries require the ILC to illuminate their meaning. The results from the LHC and ILC give a multiplicative (not additive) impact on understanding the new Terascale phenomena. Together, they provide a telescope that peers back to the time when the universe was formed.

2. Examples of ILC – LHC Synergy • The LHC can observe that new massive particles exist; the ILC will pinpoint which new force created them. • The Higgs boson is responsible for giving mass to particles. If it exists, the LHC will observe it. The ILC will tell us if it is the standard model Higgs, or is more complex. • The LHC can measure a combination of the number of extra spatial dimensions and their size; the ILC allows disentanglement of the number and size separately. backup

3. Examples of ILC – LHC Synergy • Supersymmetry provides the leading candidate for dark matter in the universe. The ILC can isolate it and measure its mass, in turn allowing the LHC to refine its measurements. Combining with cosmic background radiation probes in space, we can tell if this particle is the only dark matter particle. • The LHC and ILC are both needed to determine if the fundamental forces are unified – Einstein’s dream. backup

4. ILC as a telescope looking at the universe in the first moments after the big bang. era of OMB and DOE era of stars and galaxies era of atoms era of nuclei era of protons and neutrons era of quarks and gluons era of force unification backup

5. The Higgs boson is somewhat like the Bunraku puppeteers, dressed in black to be ‘invisible’, manipulating the players in the drama. backup

6. interaction rate collision energy Curves denote different Higgs boson spins; ILC data cleanly discriminate. The ILC measures the properties of the Higgs boson – for example, its spin and its decay fractions into different particles. If these differ from the standard model expectations, the pattern will tell us the nature of the more complex Higgs boson. supersymmetry backup

7. c20 mass error with ILC help c20 mass The precise ILC neutralino mass measurement allows the LHC to pin down other particle masses much more accurately. c20 mass error with no ILC help neutralino mass backup

8. Maybe ILC agrees with Planck; then the neutralino is likely the only dark matter particle. Maybe ILC disagrees with Planck; this would tell us that there are different forms of dark matter. backup

9. go here sense whats happening here force strength energy backup