Supervisor: Michael Luke
Office: MP 1122
Telephone: 416-978-6822
E-mail: sfreedma[at]physics[dot]utoronto[dot]ca
Address:
Department of Physics,
University of Toronto,
60, St. George St.
Toronto, Canada M5S 1A7
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Research Group: High-Energy Theory Group Supervisor: Michael Luke Office: MP 1122 Telephone: 416-978-6822 E-mail: sfreedma[at]physics[dot]utoronto[dot]ca Address: Department of Physics, University of Toronto, 60, St. George St. Toronto, Canada M5S 1A7 |
H.B.Sc University of Toronto 2007
M.Sc University of Toronto 2008
Ph.D University of Toronto 2008-present
I study Quantum Chromodynamics (QCD) using Effective Field Theories (EFTs). QCD, also known as the strong force, binds quarks and gluons together into hadrons, such as the proton and neutron. QCD is important for understanding the early structure of the Universe, but also currently important for research at the Large Hadron Collider in Geneva.
EFTs can be used to separate the physics of different scales. EFTs describe the low energy phenomena of QCD using a simpler theory, and factorize this low energy phenomena from the large energy physics. The advantage of EFTs over the traditional QCD calculation techniques is the simplicity of proving factorization theorems, as well as the ability to incoporate power corrections.
Currently, I am studying jets. Jets occur in high energy collisions when the initially highly boosted free particles radiate and form into colour singlets. Jets are important for byeond the Standard Model searches, as they form backgrounds for many signals.
I study jets using Soft-Collinear Effective Theory (SCET), which separates the highly boosted degrees of freedom making up the jets, from the soft degrees of freedom that radiate between the jets. The theory is just multiple copies of QCD for each jet and one for the soft. The different copies of QCD are coupled through Wilson lines, which represent the colour charge of the other sectors combined. At the moment I am applying SCET to various jet processes, as well as trying to better understand the workings of SCET and its power corrections.
To find out more about me, feel free to click on the links above. I will attempt to keep this site updated with my papers and talks, but also some of my projects such as my paintings and construction projects. At some point I will make this page more comprehensive, but that is too much of a time investment at the moment.