267 citations · 4.3k across the 74 of their papers we have counts for
75 papers
Unstable Particles in Quantum Field Theory
Scott Willenbrock
In honor of Dave Roper's 90th birthday, I present a pedagogical introduction to our modern understanding of unstable particles in Quantum Field Theory, based on the analytic struct…
A Brief History of Mass
Scott Willenbrock
It has been known since the 1950's that an unstable particle is associated with a complex pole in the propagator. This had to be rediscovered twice: in the early 1970's in the cont…
Mass and width of an unstable particle
Scott Willenbrock
We show that the mass and width of an unstable particle are precisely defined by the pole in the complex energy plane, , by identifying the width, , with the part…
Effective Field Theory Beyond the Standard Model
Scott Willenbrock, Cen Zhang
We review the effective field theory approach to physics beyond the Standard Model using dimension-six operators. Topics include the choice of operator basis, electroweak boson pai…
Constraints on Electroweak Effective Operators at One Loop
Harrison Mebane, Nicolas Greiner, Cen Zhang +1
We derive bounds on nine dimension-six operators involving electroweak gauge bosons and the Higgs boson from precision electroweak data. Four of these operators contribute at tree…
Effective Field Theory of Precision Electroweak Physics at One Loop
Harrison Mebane, Nicolas Greiner, Cen Zhang +1
The one loop effects of two dimension-six operators on gauge boson self energies are computed within an effective field theory framework. These self energies are translated into ef…