Accurate Test of Chiral Dynamics in the (gamma)over-right-arrowp -< pi(0) p Reaction

Hornidge, D. and Bartolome, P. Aguar and Annand, J. R. M. and Arends, H. J. and Beck, R. and Bekrenev, V. and Berghaeuser, H. and Bernstein, A. M. and Braghieri, A. and Briscoe, W. J. and Cherepnya, S. and Dieterle, M. and Downie, E. J. and Drexler, P. and Fernandez-Ramirez, C. and Filkov, L. V. and Glazier, D. I. and Barrientos, P. Hall and Heid, E. and Hilt, M. and Jaegle, I. and Jahn, O. and Jude, T. C. and Kashevarov, V. L. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Koulbardis, A. and Krambrich, D. and Kruglov, S. and Krusche, B. and Laffoley, A. T. and Lisin, V. and Livingston, K. and MacGregor, I. J. D. and Mancell, J. and Manley, D. M. and McNicoll, E. F. and Mekterovic, D. and Metag, V. and Micanovic, S. and Middleton, D. G. and Moores, K. W. and Mushkarenkov, A. and Nefkens, B. M. K. and Oberle, M. and Ostrick, M. and Otte, P. B. and Oussena, B. and Pedroni, P. and Pheron, F. and Polonski, A. and Prakhov, S. and Robinson, J. and Rostomyan, T. and Scherer, S. and Schumann, S. and Sikora, M. H. and Starostin, A. and Supek, I. and Thiel, M. and Thomas, A. and Tiator, L. and Unverzagt, M. and Watts, D. P. and Werthmueller, D. and Witthauer, L.. (2013) Accurate Test of Chiral Dynamics in the (gamma)over-right-arrowp -< pi(0) p Reaction. Physical review letters, Vol. 111, H. 6 , 062004.

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Official URL: http://edoc.unibas.ch/dok/A6223418

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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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:27 Mar 2014 13:12
Deposited On:27 Mar 2014 13:12

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