CREx Transverse Asymmetry Measurements

Thesis/Dissertation · Mon Aug 01 04:00:00 EDT 2022

OSTI ID:1867437

Radloff, Robert ^[1]

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1. Ohio Univ., Athens, OH (United States)

A number of recent experiments have been able to successfully measure the parity violating asymmetry of electron-nucleus scattering and use its value to constrain the nuclear structure. The most recent of these, the Calcium Radius Experiment (CREX), finished taking data in Hall A of Jefferson Lab in 2021, and successfully extracted a neutron radius for 48Ca. While the main measurements of these experiments are parity violating, there is an increasing amount of interest in the parity conserving Beam Normal Single Spin Asymmetry (BNSSA) systematic. If not properly suppressed, the BNSSA can compete with or exceed the parity violating measurement. Recent attempts to model the contributions from standard model suppressed higher order diagrams have struggled to predict behavior of BNSSA for all nuclei. This document reports new measurements of the BNSSA at a beam energy of 2.18 GeV for 12C, 40Ca, 48Ca, and 208Pb from the CREX running period.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1867437
• Report Number(s): JLAB-PHY-22-3611; DOE/OR/23177-5491; NSF awards 1614479 and 1913170
• Country of Publication: United States
• Language: English