# The 58th Winter Nuclear & Particle Physics Conference 2021

9-12 February 2021
Virtual Meeting
America/Toronto timezone

## Charged Meson Form Factors at Jefferson Lab Hall C

11 Feb 2021, 13:30
15m
Virtual Meeting

### Speaker

Nathan Heinrich (University of Regina)

### Description

Quantum Chromodynamics (QCD) is the accepted theory of the strong force between quarks and gluons and in recent years many successful predictions have come out of perturbative QCD (pQCD). However, pQCD is restricted by the running coupling constant $\alpha_s$, so at lower energies a problem arises where the predictions of pQCD no longer apply. While QCD-based models attempt to understand this region, they must be guided by experiment. Thus, many open questions remain: How does QCD transition between the perturbative (weak) and non-perturbative (strong) regimes? What predictions does QCD make for hadronic structure? How do other properties of hadrons, such as mass and spin, arise from QCD? In order to help answer these questions, the form factors of charged mesons, specifically the $\pi^+$ and $K^+$, are ideal candidates as they are relatively simple systems for theory to predict and are accessible experimentally. As the Goldstone bosons of the strong interaction, they are also seen as key to understanding some properties of QCD, such as Dynamic Chiral Symmetry Breaking (DCSB), which is the mechanism believed to generate >98% of the visible mass in the universe. This talk will give an overview of the effort to study the $\pi^+$ and $K^+$ form factors at Jefferson Lab, as well as a quick overview of the facilities at Jefferson Lab and Hall C.

### Primary author

Nathan Heinrich (University of Regina)

### Co-authors

Mr Ali Usman (University of Regina) Dr Dave Gaskell (Jefferson Lab) Prof. Garth Huber (University of Regina) Prof. Peter Markovitz (Florida International University) Mr Richard Trotta (Catholic University of America) Dr Stephen Kay (University of Regina) Prof. Tanja Horn (Catholic University of America) Mr Vijay Kumar (University of Regina) Dr Vladimir Berdinkov (Catholic University of America)

### Presentation Materials

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