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Precise Measurement of Sigma Beam Asymmetry for Positive Pion Photoproduction on the Proton from 800 to 1500 Mev
- Source :
- Physics Letters B, Physics Letters B, Elsevier, 2002, 544, pp.113-120. ⟨10.1016/S0370-2693(02)02467-X⟩
- Publication Year :
- 2002
- Publisher :
- arXiv, 2002.
-
Abstract
- The Sigma beam asymmetry for positive pion photoproduction on the proton has been measured over an angular range of 40-170 deg at photon energies from 0.8 to 1.5 GeV. The resulting data set includes 237 accurate points, 136 of these belonging to an almost unexplored domain above 1.05 GeV. Data of such high precision provide severe constraints for partial wave analyses. The influence of this experiment on the GW multipole analysis is demonstrated. Significant changes are found in multipoles connected to the S31(1620) and P13(1720) resonances. Comparisons using the MAID analysis are also presented.<br />Comment: 11 pages, 4 eps figures. to be published in Physics Letters B
- Subjects :
- EXTRACTION
Polarization observables
Angular range
Nuclear and High Energy Physics
π + photoproduction
Baryon resonances
Partial wave analysis
Photon beam asymmetry
Photon
Proton
media_common.quotation_subject
FOS: Physical sciences
OBSERVABLES
01 natural sciences
7. Clean energy
Asymmetry
Settore FIS/04 - Fisica Nucleare e Subnucleare
Nuclear physics
Pion
ETA-PHOTOPRODUCTION
BGO CALORIMETER
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Nuclear Experiment (nucl-ex)
NUCLEON
010306 general physics
Nuclear Experiment
AMPLITUDES
pi(+) photoproduction
media_common
Physics
π+ photoproduction
010308 nuclear & particles physics
Sigma
RESONANCE
MODEL
High Energy Physics::Experiment
Multipole expansion
baryon resonances
polarization observables
photon beam asymmetry
partial wave analysis
Beam (structure)
Subjects
Details
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, Physics Letters B, Elsevier, 2002, 544, pp.113-120. ⟨10.1016/S0370-2693(02)02467-X⟩
- Accession number :
- edsair.doi.dedup.....f384c1628287b3f6a6205ec23c84b6f1
- Full Text :
- https://doi.org/10.48550/arxiv.nucl-ex/0207010