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

Journal Article · Thu Aug 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3483400· OSTI ID:21426463

Sparks, Nathan ^[1]

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1. Florida State University, Tallahassee, FL, 32306 (United States)

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.

• OSTI ID: 21426463
• Journal Information: AIP Conference Proceedings, Vol. 1257, 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; ISSN 0094-243X
• Country of Publication: United States
• Language: English

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