# The 34th International Symposium on Lattice Field Theory (Lattice 2016)

Jul 24 – 30, 2016
Highfield Campus, University of Southampton
Europe/London timezone

## Infrared properties of a prototype pNGB model for beyond-SM physics

Jul 25, 2016, 2:35 PM
20m
Building 67 Room 1027 (Highfield Campus, University of Southampton)

### Building 67 Room 1027

#### Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Physics Beyond the Standard Model

### Speaker

Prof. Anna Hasenfratz (University of Colorado)

### Description

We construct a prototype BSM model where the Higgs boson is a pseudo Nambu-Goldstone boson by combining 4 light (massless) flavors and 8 heavy flavors. In the infrared, the SU(4) chiral symmetry is spontaneously broken , while in the ultraviolet it exhibits the properties of the $N_f=12$ conformal fixed point. The running coupling of this system walks" and the energy range of walking can be tuned by the mass of the heavy flavors. At the same time, renormalization group considerations predict the spectrum of such a system to show hyperscaling i.e. hadron masses in units of $F_\pi$ are independent of the heavy mass. Hyperscaling is present for bound states made-up of light, heavy, or heavy and light flavors. This observation is supported by numerical observations and makes the model strongly predictive.

### Primary author

Prof. Anna Hasenfratz (University of Colorado)

### Co-authors

Prof. Claudio Rebbi (Boston University) Dr Oliver Witzel (University of Edinburgh)

 Slides