Now showing items 1-6 of 6

    • Color fields on the light-shell 

      Georgi, Howard; Kestin, Gregory Michael; Sajjad, Aqil (Springer Science + Business Media, 2016)
      We study the classical color radiation from very high energy collisions that produce colored particles. In the extreme high energy limit, the classical color fields are confined to a light-shell expanding at c and are ...
    • Continuum-mediated dark matter–baryon scattering 

      Katz, Andrey; Reece, Matthew; Sajjad, Aqil (Elsevier BV, 2016)
      Many models of dark matter scattering with baryons may be treated either as a simple contact interaction or as the exchange of a light mediator particle. We study an alternative, in which a continuum of light mediator ...
    • An effective theory on the light shell 

      Sajjad, Aqil (2014-10-21)
      We describe work on the construction of an effective field theory on a spherical light shell. The motivation arises from classical electromagnetism: If a collision produces charged particles with zero net charge emerging ...
    • Naturalness, b to sγ, and SUSY heavy Higgses 

      Katz, Andrey; Reece, Matthew; Sajjad, Aqil (Springer Science + Business Media, 2014)
      We explore naturalness constraints on the masses of the heavy Higgs bosons \(H^0\) , \(H^ ±\), and \(A^0\) in supersymmetric theories. We show that, in any extension of MSSM which accommodates the 125 GeV Higgs at the tree ...
    • Photon propagator in light-shell gauge 

      Georgi, Howard; Kestin, Gregory Michael; Sajjad, Aqil (American Physical Society (APS), 2016)
      We derive the photon propagator in light-shell gauge (LSG), introduced in [1] in the context of light-shell effective theory.
    • Towards an effective field theory on the light-shell 

      Georgi, Howard; Kestin, Gregory Michael; Sajjad, Aqil (Springer Science + Business Media, 2016)
      We discuss our work toward the construction of a light-shell effective theory (LSET), an effective field theory for describing the matter emerging from high-energy collisions and the accompanying radiation. We work in the ...