T and F asymmetries in π0 photoproduction on the proton

Annand, J.R.M. et al. (2016) T and F asymmetries in π0 photoproduction on the proton. Physical Review C, 93(5), 055209. (doi:10.1103/PhysRevC.93.055209)

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Abstract

The γp→π0p reaction was studied at laboratory photon energies from 425 to 1445 MeV with a transversely polarized target and a longitudinally polarized beam. The beam-target asymmetry F was measured for the first time and new high precision data for the target asymmetry T were obtained. The experiment was performed at the photon tagging facility of the Mainz Microtron (MAMI) using the Crystal Ball and TAPS photon spectrometers. The polarized cross sections were expanded in terms of associated Legendre functions and compared to recent predictions from several partial-wave analyses. The impact of the new data on our understanding of the underlying partial-wave amplitudes and baryon resonance contributions is discussed.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Glazier, Dr Derek and MacGregor, Professor I and Livingston, Dr Kenneth and Annand, Dr John and Hamilton, Dr David
Authors: Annand, J.R.M., Arends, H.J., Beck, R., Borisov, N., Braghieri, A., Briscoe, W.J., Cherepnya, S., Collicott, C., Costanza, S., Downie, E.J., Dieterle, M., Fix, A., Fil'kov, L.V., Garni, S., Glazier, D.I., Gradl, W., Gurevich, G., Hall Barrientos, P., Hamilton, D., Hornidge, D., Howdle, D., Huber, G.M., Kashevarov, V.L., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A., Lisin, V., Livingston, K., MacGregor, I.J.D., Mancel, J., Manley, D.M., Martel, P.P., McNicoll, E.F., Meyer, W., Middleton, D.G., Miskimen, R., Mushkarenkov, A., Neganov, A., Nikolaev, A., Oberle, M., Ortega, H., Ostrick, M., Ott, P., Otte, P.B., Oussena, B., Pedroni, P., Polonski, A., Polyanski, V.V., Prakhov, S., Reicherz, G., Rostomyan, T., Sarty, A., Schumann, S., Steffen, O., Strakovsky, I.I., Strub, T., Supek, I., Tiator, L., Thomas, A., Unverzagt, M., Usov, Y.A., Watts, D.P., Werthmüller, D., Witthauer, L., and Wolfes, M.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:Nuclear Physics
Journal Name:Physical Review C
Publisher:American Physical Society
ISSN:0556-2813
ISSN (Online):1089-490X
Copyright Holders:Copyright © 2016 American Physical Society
First Published:First published in Physical Review C 93(5): 055209
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
570711Nuclear Physics GroupDavid IrelandScience & Technologies Facilities Council (STFC)ST/J000175/1P&A - PHYSICS & ASTRONOMY
507271Illuminating strongly interacting matterI MacgregorScience & Technologies Facilities Council (STFC)ST/G008604/1P&A - PHYSICS & ASTRONOMY