Phenomenology 2018 Symposium

Session

Theoretical Developments

3

7 May 2018, 14:15

G-28 (Benedum Hall)

456. The Constructive SM: Part I

Dr Neil Christensen (Illinois State University)

07/05/2018, 14:15

parallel talk

This paper is based on arXiv:1802.00448 where we construct the complete set of minimal 3-point vertices for the massive Standard Model (SM) based purely on symmetry principles, mass dimension and high-energy behavior and without any recourse to field theory, gauge symmetries or Feynman rules. Because the gravitational vertices are no more challenging than any other vertices in this...

547. Global $SU(2)_L \otimes$BRST symmetry and its LSS theorem: Ward-Takahashi identities governing Green's functions, on-shell T-Matrix elements, and the effective potential, in the scalar-sector of certain spontaneously broken non-Abelian gauge theories

Ozenc Gungor (Case Western Reserve University)

07/05/2018, 14:30

parallel talk

A gauge theory with the gauge group $SU(2)_L$ is the simplest non-abelian spontaneous symmetry breaking theory. Its’ simplest bosonic representation is a complex scalar doublet in the linear representation with a scalar $h$, pseudoscalars $\vec{\pi}$ and vector gauge bosons $\vec{W}_{\mu}$. We observe that the on-shell T matrix elements of physical states are independent of global $SU(2)_L$...

473. A linked cluster expansion for the Functional Renormalization Group of the Legendre effective action

Mr Rudrajit Banerjee (University of Pittsburgh)

07/05/2018, 14:45

parallel talk

A lattice version of the widely used Functional Renormalization Group (FRG) for the Legendre effective action is solved (exactly) in terms of a linked cluster expansion. The graph rules invoke only one-line irreducible graphs and a new type of labeled tree graphs. Conversely the FRG induces nonlinear flow equations governing suitable resummations of the graph expansion. The correspondence is...

596. Finding an EFT for Nearly Conformal Gauge Theories

James Ingoldby (Yale University)

07/05/2018, 15:00

parallel talk

Recent lattice calculations have shown that confining gauge theories with a number of light fermion flavors just below the critical value for transition to infrared conformal behavior possess a light scalar composite state. Such nearly conformal gauge theories could be responsible for the breaking of electroweak symmetry with the light scalar interpreted as a Composite Higgs. Finding a...

578. Towards an Asymptotically Safe Standard Model

Dr Zhi-Wei Wang (CP3-Origins and University of Waterloo)

07/05/2018, 15:15

parallel talk

We construct asymptotically safe extensions of the Standard Model by adding gauged vector-like fermions. Using large number-of-flavour techniques we argue that all gauge couplings, including the hypercharge and, under certain conditions, the Higgs coupling can achieve an interacting ultraviolet fixed point.

453. Soft-Collinear Effective Theory for Gravity

Mr Arash Yunesi (Florida State University), Arash Yunesi, Arash Yunesi

07/05/2018, 15:30

parallel talk

Soft Collinear Effective Theory (SCET) has originally been developed in the framework of QCD. SCET for QCD facilitates calculation of scattering amplitudes for jets of highly collimated and energetic particles with soft radiations in a systematic and efficient way. A small parameter, $\lambda$, is used to describe the soft and collinear regions of the phase space. As a consequence the...

508. Domain Wall Standard Model

Mr Desmond Villalba (University of Alabama)

07/05/2018, 15:45

parallel talk

We propose the Domain-Wall(DW) Standard model(SM), where all the SM fields are localized in a non-compact 5D space-time. The DWSM has several interesting implications. Particularly, the interplay between DW fermions and DW gauge bosons is dependent on their mutual configuration in the 5D bulk. By localizing left and right-handed fermions in different places throughout the bulk, this...