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Title: Beam Asymmetries in {pi}{sup 0} Photoproduction on the Proton

Abstract

Polarization observables, such as the beam asymmetry {Sigma}, are vital to the study of the many N* and {Delta} resonances that decay to the p{pi}{sup 0} final state. Beam asymmetries in {pi}{sup 0} photoproduction off the proton have been determined using the Crystal Barrel CsI(Tl) calorimeter at ELSA, University of Bonn in Germany, in the energy range E{gamma} = 920 to 1680 MeV by analyzing the neutral decay mode {pi}{sup 0{yields}{gamma}{gamma}}. In this experiment, the BaF{sub 2} spectrometer TAPS was placed in the forward direction increasing the solid angle coverage to nearly 4{pi} and serving as a fast trigger. For the first time, these measurements include the most forward angles in {theta}{sub {pi}}{sup 0c{center_dot}m}. Additionally, this analysis provides new data points in the energy range E{gamma} = 1510 to 1680 MeV where few measurements have previously been made.

Authors:
 [1]
  1. Florida State University, Tallahassee, FL, 32306 (United States)
Publication Date:
OSTI Identifier:
21426463
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1257; Journal Issue: 1; Conference: HADRON 2009: 13. international conference on hadron spectroscopy, Tallahassee, FL (United States), 29 Nov - 4 Dec 2009; Other Information: DOI: 10.1063/1.3483400; (c) 2010 American Institute of Physics; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ASYMMETRY; BARIUM FLUORIDES; MEV RANGE; MULTIPARTICLE SPECTROMETERS; N*BARYONS; PARTICLE DECAY; PARTICLE IDENTIFICATION; PHOTON-PROTON INTERACTIONS; PHOTONS; PHOTOPRODUCTION; PIONS NEUTRAL; POLARIZATION; PROTONS; QUANTUM CHROMODYNAMICS; RESONANCE PARTICLES; SHOWER COUNTERS; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BARYONS; BASIC INTERACTIONS; BOSONS; DECAY; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FIELD THEORIES; FLUORIDES; FLUORINE COMPOUNDS; HADRONS; HALIDES; HALOGEN COMPOUNDS; INTERACTIONS; MASSLESS PARTICLES; MEASURING INSTRUMENTS; MESONS; NUCLEONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PHOTON-NUCLEON INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; RADIATION DETECTORS; SPECTROMETERS

Citation Formats

Sparks, Nathan. Beam Asymmetries in {pi}{sup 0} Photoproduction on the Proton. United States: N. p., 2010. Web. doi:10.1063/1.3483400.
Sparks, Nathan. Beam Asymmetries in {pi}{sup 0} Photoproduction on the Proton. United States. https://doi.org/10.1063/1.3483400
Sparks, Nathan. 2010. "Beam Asymmetries in {pi}{sup 0} Photoproduction on the Proton". United States. https://doi.org/10.1063/1.3483400.
@article{osti_21426463,
title = {Beam Asymmetries in {pi}{sup 0} Photoproduction on the Proton},
author = {Sparks, Nathan},
abstractNote = {Polarization observables, such as the beam asymmetry {Sigma}, are vital to the study of the many N* and {Delta} resonances that decay to the p{pi}{sup 0} final state. Beam asymmetries in {pi}{sup 0} photoproduction off the proton have been determined using the Crystal Barrel CsI(Tl) calorimeter at ELSA, University of Bonn in Germany, in the energy range E{gamma} = 920 to 1680 MeV by analyzing the neutral decay mode {pi}{sup 0{yields}{gamma}{gamma}}. In this experiment, the BaF{sub 2} spectrometer TAPS was placed in the forward direction increasing the solid angle coverage to nearly 4{pi} and serving as a fast trigger. For the first time, these measurements include the most forward angles in {theta}{sub {pi}}{sup 0c{center_dot}m}. Additionally, this analysis provides new data points in the energy range E{gamma} = 1510 to 1680 MeV where few measurements have previously been made.},
doi = {10.1063/1.3483400},
url = {https://www.osti.gov/biblio/21426463}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1257,
place = {United States},
year = {Thu Aug 05 00:00:00 EDT 2010},
month = {Thu Aug 05 00:00:00 EDT 2010}
}