| Literature DB >> 23971564 |
D Hornidge1, P Aguar Bartolomé, J R M Annand, H J Arends, R Beck, V Bekrenev, H Berghäuser, A M Bernstein, A Braghieri, W J Briscoe, S Cherepnya, M Dieterle, E J Downie, P Drexler, C Fernández-Ramírez, L V Filkov, D I Glazier, P Hall Barrientos, E Heid, M Hilt, I Jaegle, O Jahn, T C Jude, V L Kashevarov, I Keshelashvili, R Kondratiev, M Korolija, A Koulbardis, D Krambrich, S Kruglov, B Krusche, A T Laffoley, V Lisin, K Livingston, I J D MacGregor, J Mancell, D M Manley, E F McNicoll, D Mekterovic, V Metag, S Micanovic, D G Middleton, K W Moores, A Mushkarenkov, B M K Nefkens, M Oberle, M Ostrick, P B Otte, B Oussena, P Pedroni, F Pheron, A Polonski, S Prakhov, J Robinson, T Rostomyan, S Scherer, S Schumann, M H Sikora, A Starostin, I Supek, M Thiel, A Thomas, L Tiator, M Unverzagt, D P Watts, D Werthmüller, L Witthauer.
Abstract
A precision measurement of the differential cross sections dσ/dΩ and the linearly polarized photon asymmetry Σ≡(dσ⊥-dσ∥)/(dσ⊥+dσ∥) for the γp→π0p reaction in the near-threshold region has been performed with a tagged photon beam and almost 4π 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.Entities:
Year: 2013 PMID： 23971564 DOI： 10.1103/PhysRevLett.111.062004
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161