Details

Autor(en) / Beteiligte

• Hornidge, D
• Aguar Bartolomé, P
• Annand, J R M
• Arends, H J
• Beck, R
• Bekrenev, V
• Berghäuser, H
• Bernstein, A M
• Braghieri, A
• Briscoe, W J
• Cherepnya, S
• Dieterle, M
• Downie, E J
• Drexler, P
• Fernández-Ramírez, C
• Filkov, L V
• Glazier, D I
• Hall 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
• Werthmüller, D
• Witthauer, L

Titel

Accurate test of chiral dynamics in the γp→π0p reaction

Ist Teil von

• Physical review letters, 2013-08, Vol.111 (6), p.062004-062004

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• 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.