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Title: Polarization Observables T and F in the yp → pi p Reaction

Abstract

The theory that describes the interaction of quarks is Quantum Chromodynamics (QCD), but how quarks are bound inside a nucleon is not yet well understood. Pion photoproduction experiments reveal important information about the nucleon excited states and the dynamics of the quarks within it and thus provide a useful tool to study QCD. Detailed information about this reaction can be obtained in experiments that utilize polarized photon beams and polarized targets. Pion photoproduction in the γρ → π0ρ reaction has been measured in the FROST experiment at the Thomas Jefferson National Accelerator Facility. In this experiment circularly polarized photons with electron-beam energies up to 3.082 GeV impinged on a transversely polarized frozen-spin target. Final-state protons were detected in the CEBAF Large Acceptance Spectrometer. Results of the polarization observables T and F have been extracted. The data generally agree with predictions of present partial wave analyses, but also show marked differences. The data will constrain further partial wave analyses and improve the extraction of proton resonance properties.

Authors:
 [1]
  1. Univ. of South Carolina, Columbia, SC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1426891
Report Number(s):
JLAB-PHY-17-2645; DOE/OR/23177-4375
DOE Contract Number:  
AC05-06OR23177; NSF PHY-1505615
Resource Type:
Thesis/Dissertation
Resource Relation:
Related Information: JLAB Experiments: E02-112, E03-105, E04-102, E05-012, E06-013
Country of Publication:
United States
Language:
English

Citation Formats

Jiang, Hao. Polarization Observables T and F in the yp → pi p Reaction. United States: N. p., 2017. Web. doi:10.2172/1426891.
Jiang, Hao. Polarization Observables T and F in the yp → pi p Reaction. United States. doi:10.2172/1426891.
Jiang, Hao. Thu . "Polarization Observables T and F in the yp → pi p Reaction". United States. doi:10.2172/1426891. https://www.osti.gov/servlets/purl/1426891.
@article{osti_1426891,
title = {Polarization Observables T and F in the yp → pi p Reaction},
author = {Jiang, Hao},
abstractNote = {The theory that describes the interaction of quarks is Quantum Chromodynamics (QCD), but how quarks are bound inside a nucleon is not yet well understood. Pion photoproduction experiments reveal important information about the nucleon excited states and the dynamics of the quarks within it and thus provide a useful tool to study QCD. Detailed information about this reaction can be obtained in experiments that utilize polarized photon beams and polarized targets. Pion photoproduction in the γρ → π0ρ reaction has been measured in the FROST experiment at the Thomas Jefferson National Accelerator Facility. In this experiment circularly polarized photons with electron-beam energies up to 3.082 GeV impinged on a transversely polarized frozen-spin target. Final-state protons were detected in the CEBAF Large Acceptance Spectrometer. Results of the polarization observables T and F have been extracted. The data generally agree with predictions of present partial wave analyses, but also show marked differences. The data will constrain further partial wave analyses and improve the extraction of proton resonance properties.},
doi = {10.2172/1426891},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {8}
}

Thesis/Dissertation:
Other availability
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