Please visit Jefferson Lab Event Policies and Guidance before planning your next event: https://www.jlab.org/conference_planning.

# Light Cone 2018

14-18 May 2018
Jefferson Lab - CEBAF Center
US/Eastern timezone

## Direct calculation of slope of form factors in lattice QCD.

15 May 2018, 17:30
20m
Auditorium (Jefferson Lab - CEBAF Center)

### Speaker

Dr David Richards (Jefferson Lab)

### Description

The charge radius of the nucleon can be related to the slope of the electromagnetic form factors at zero momentum transfer. Calculations of the form factors using lattice QCD are typically obtained for a discrete set of momenta $Q^2$, from which the charge radius can be inferred. We present a method to compute the slope of electromagnetic form factors directly, including at $Q^2 = 0$, by computing the coordinate-space moments of current matrix elements. We begin by describing the formalism, and then apply it to the calculation of the isovector form factor of the nucleon.

### Primary author

Dr David Richards (Jefferson Lab)

### Co-authors

Chia Chen Chang (LBNL) Christopher Bouchard (University of Glasgow) Prof. Kostas Orginos (William and Mary / JLab)

 Slides