Driving Problem: The Minimal Supersymmetric Model describes 5 physical Higgs Bosons, the lightest being very nearly Standard-Model like and relatively easily located by particle accelerators. Such a particle has been discovered with a mass of 125 GeV. Unfortunately, this so severely constrains the mass spectrum of superparticles it is likely neutralino-only cold dark matter cannot exist.
"...However, the recent evidence from Atlas and CMS on a light Higgs scalar with mass m_h\simeq 125 GeV highly constrains the superparticle mass spectrum, which in turn constrains the neutralino annihilation mechanisms in the early universe. We find that stau and stop co-annihilation mechanisms -- already highly stressed by the latest Atlas/CMS results on SUSY searches -- are nearly eliminated if indeed the light Higgs scalar has mass m_h\simeq 125 GeV. Furthermore, neutralino annihilation via the A-resonance is essentially ruled out in mSUGRA so that it is exceedingly difficult to generate thermally-produced neutralino-only dark matter at the measured abundance."
-Baer, Howard: Vernon Berger and Azer Mustafayev. "Neutralino Dark Matter in mSUGRA/CMSSM with a 125 GeV Light Higgs Scalar." Cornell University Library, 17 Feb. 2012. Web. 17 Oct. 2012. http://arxiv.org/abs/1202.4038
Hypothesis: A mixed-higgsino state is the best candidate to describe the Cold Dark Matter in the universe.
This problem is extremely complex and very multilayered-first of all, I will be looking for the best Cold Dark Matter model using this 125 GeV Higgs (this is an actual finding from the Large Hadron Collider.) I am going by the Minimal Supersymmetric Model and the Minimal Supergravity Model, not the Next-to-Minimal Supersymmetric Model (in which case the answers would be very different.) I will be using, obviously, data on the Higgs and the top quark from various particle accelerators to find the rough mass of the lightest supersymmetric particle and I will check my answers with various similar studies from other scientists. Then, once I have built my Cold Dark Matter model, I want to construct a hypothetical device to find the sparticles involved. I will research different existing experiments, compare the data they have on WIMP candidates, decide whether to make a direct/indirect detector etc. and go from there. My experiment will be almost purely mathematical.
Category: Physics
This problem is extremely complex and very multilayered-first of all, I will be looking for the best Cold Dark Matter model using this 125 GeV Higgs (this is an actual finding from the Large Hadron Collider.) I am going by the Minimal Supersymmetric Model and the Minimal Supergravity Model, not the Next-to-Minimal Supersymmetric Model (in which case the answers would be very different.) I will be using, obviously, data on the Higgs and the top quark from various particle accelerators to find the rough mass of the lightest supersymmetric particle and I will check my answers with various similar studies from other scientists. Then, once I have built my Cold Dark Matter model, I want to construct a hypothetical device to find the sparticles involved. I will research different existing experiments, compare the data they have on WIMP candidates, decide whether to make a direct/indirect detector etc. and go from there. My experiment will be almost purely mathematical.
Category: Physics
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