Super-Rosenbluth Measurements with Electrons and Positrons

TL;DR

This paper discusses high-precision Super-Rosenbluth measurements of the proton form factor ratio using electrons and positrons, aiming to constrain two-photon exchange effects and improve understanding of proton structure.

Contribution

It introduces the Super-Rosenbluth measurement technique with positrons and evaluates its potential precision at Jefferson Lab, enhancing previous proton form factor studies.

Findings

High-precision measurements of mu*GE/GM achieved

Potential for improved constraints on two-photon exchange effects

Feasibility of using low-intensity positron beams analyzed

Abstract

Precise measurements of the proton form factor ratio mu*GE/GM from Rosenbluth separation measurements can be combined with Polarization based extractions to provide significant constraints on two-photon exchange contributions to the elastic e-p cross section. We present an overview of JLab experiment E05-017, the high-precision Super-Rosenbluth measurements of the proton form factor taken in Hall C of Jefferson Lab. We then examine what precision could be obtained for Super-Rosenbluth measurements using a low-intensity positron beam at Jefferson Lab.