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Jason St. John

Graduate Student
Office: CERN
Email: stjohn@physics.bu.edu
Website: http://buphy.bu.edu/~stjohn

Availability (office hours): PRB 4th floor in the CMS lab
or
PRB 2nd floor in my office-icle

 

Research Interests:

Measurement of anomolous trilinear gauge couplings (the non-Abelian structure of the electroweak vector gauge bosons). These could be measured in diboson LHC events where one W boson decays leptonically (easier to sift out), and the other decays to two jets (higher cross section). It will be important to beat down QCD jets faking the hadron W boson decay (so that’s exciting to learn about for me). The quartic couplings are also on my mind, but trickier to measure. What about
Z → ZW+W-
or
W → WZZ
which will require an understanding of jet multiplicity in QCD, and being able to pay the price of smaller coupling constants, nastier phas space, and possibly some helicity price as well. Maybe helicity will help, actually.

If there is an energy frontier resonance (read: “a new subatomic particle”) which is responsible for electroweak symmetry breaking, this analysis will be very sensitive to it (I’m looking at you, Higgs).