CLAS+FROST: new generation of photoproduction experiments at Jefferson Lab

TL;DR

This paper discusses the new generation of photoproduction experiments at Jefferson Lab's Hall B, utilizing CLAS and FROST to enable comprehensive polarization measurements for baryon spectroscopy.

Contribution

It introduces the integration of FROST with CLAS, enabling nearly complete polarization experiments for the first time in baryon photoproduction.

Findings

Enhanced capability for model-independent reaction amplitude extraction

First-time measurement of double and triple polarization observables

Progress report on the experiment's current status

Abstract

A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams provide unique conditions for this type of experiments. Recent addition of the Frozen Spin Target (FROST) gives a remarkable opportunity to measure double and triple polarization observables for different pseudo-scalar meson photoproduction processes. For the first time, a complete or nearly complete experiment becomes possible and will allow model independent extraction of the reaction amplitude. An overview of the experiment and its current status is presented.