Supersymmetry

Currently under editing by Katharine Bernart

Supersymmetry is the postulated existence of one-to-one correspondence between fundamental fermions and fundamental bosons (R-symmetry). This proposed symmetry has not been observed, but could hold true at higher energies than presently observable. [1] [2] [3] Supersymmetry acts as an expansion of the standard model of particle physics. The discovery of the higgs boson in 2012 completed the standard model, but it still leaves some questions unanswered. Supersymmetry aims to fill gaps left by the standard model and explain the phenomena of particle interactions. [5]

Consequences of Supersymmetry

Supersymmetry would more than double the number of standard model particles because it requires each known particle, as well as a few undiscovered ones, to have a superpartner (shown in the outer ring of the diagram below). Adding a single Higgsino results in gauge anomalies; as such a second Higgs doublet is required. Supersymmetry may also provide a means for unifying the strong and electroweak force.

In the first graph above you can see that in the standard model without supersymmetry at high energies the three couplings do not unify. In the graph to the left of that however you can see that with supersymmetry the three couplings may converge at some high energy scale. Supersymmetric partners may be one of the constituents of particulate dark matter.

Connectedness

This is extremely fascinating to me even though there is no real connection to my major, and there are no industrial applications because these tiny particles have extremely large-scale ramifications such as our understanding of gravity and how and why certain natural phenomena such as black holes and galaxies exist as they do. I think it is really cool because for most people this is just curiosity for curiosities sake. If super partners were discovered it would never have any impact on my life other than understanding why we have gravity or other forces.

History

Hironari Miyazawa was the first person to propose supersymmetry, and his was relating mesons and baryons. Because of how broken his symmetry was, his work was largely ignored. 2 groups of scientists all independently began working on a supersymmetry in quantum field theory around the same time, J. L. Gervais and B. Sakita(1971), Yu. A. Golfand and E. P. Likhtman(1971), and D. V. Volkov and V. P. Akulov(1972). The Gervais-Sakita works arose because of an early version of string theory. The model proposed by Pierre Fayet known as the Minimal Supersymmetric Standard Model was the first realistic model in superstring theory proposed.[1] [3] [4]

See also

Quantum Theory

Einstein's Theory of General Relativity

String Theory

Higgs field

Elementary Particles and Particle Physics Theory

Further reading

Books, Articles or other print media on this topic

External links

[1] Wikipedia.en

[2] Introduction to Supersymmetry by Hitoshi Murayama

[3] String Theory and Supersymmetry for Dummies

[4] Supersymmetry by Christine Sutton

References

https://en.wikipedia.org/wiki/Supersymmetry http://hitoshi.berkeley.edu/public_html/susy/susy.html http://www.britannica.com/science/supersymmetry http://www.dummies.com/how-to/content/string-theory-the-history-of-supersymmetry.html