Hornidge, D. et al. (2013) Accurate test of chiral dynamics in the ~γp → π 0p reaction. Physical Review Letters, 111(6), Art. 062004. (doi: 10.1103/PhysRevLett.111.062004) (PMID:23971564)
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Abstract
A precision measurement of the differential cross sections d sigma/d Omega and the linearly polarized photon asymmetry Sigma equivalent to (d alpha(perpendicular to) - d sigma(parallel to))/(d alpha(perpendicular to) + d sigma(parallel to) for the (gamma) over right arrowp -> pi(0) p reaction in the near-threshold region has been performed with a tagged photon beam and almost 4 pi detector at the Mainz Microtron. The Glasgow-Mainz photon tagging facility along with the Crystal Ball/TAPS multiphoton detector system and a cryogenic liquid hydrogen target were used. These data allowed for a precise determination of the energy dependence of the real parts of the S- and all three P-wave amplitudes for the first time and provide the most stringent test to date of the predictions of chiral perturbation theory and its energy region of agreement with experiment.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Middleton, Dr Duncan and Glazier, Dr Derek and Robinson, Mr Jamie and Downie, Dr Evangeline and MacGregor, Professor Douglas and Livingston, Dr Kenneth and McNicoll, Miss Eilidh and Mancell, Mr Joe and Annand, Dr John |
| Authors: | Hornidge, D., Bartolome, P., Annand, J. R. M., Arends, H. J., Beck, R., Bekrenev, V., Berghaeuser, H., Bernstein, A. M., Braghieri, A., Briscoe, W. J., Cherepnya, S., Dieterle, M., Downie, E. J., Drexler, P., Fernandez-Ramirez, C., Filkov, L. V., Glazier, D. I., Barrientos, P., Heid, E., Hilt, M., Jaegle, I., Jahn, O., Jude, T. C., Kashevarov, V. L., Keshelashvili, I., Kondratiev, R., Korolija, M., Koulbardis, A., Krambrich, D., Kruglov, S., Krusche, B., Laffoley, A. T., Lisin, V., Livingston, K., MacGregor, I.J.D., Mancell, J., Manley, D. M., McNicoll, E.F., Mekterovic, D., Metag, V., Micanovic, S., Middleton, D.G., Moores, K. W., Mushkarenkov, A., Nefkens, B. M. K., Oberle, M., Ostrick, M., Otte, P. B., Oussena, B., Pedroni, P., Pheron, F., Polonski, A., Prakhov, S., Robinson, J., Rostomyan, T., Scherer, S., Schumann, S., Sikora, M. H., Starostin, A., Supek, I., Thiel, M., Thomas, A., Tiator, L., Unverzagt, M., Watts, D. P., Werthmueller, D., and Witthauer, L. |
| 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 Letters |
| Journal Abbr.: | Phys. Rev. Lett. |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| ISSN (Online): | 1079-7114 |
| Copyright Holders: | Copyright © 2013 American Physical Society |
| First Published: | First published in Physical Review Letters 111(6):062004 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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