Hornidge, DAguar Bartolomé, P.J. R. M. Annand,Fernández Ramírez, Césaret al2024-12-092024-12-092013-08-07Hornidge, 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)1079-7114, 0031-9007https://doi.org/10.1103/PhysRevLett.111.062004https://hdl.handle.net/20.500.14468/24744This is an Accepted Manuscript of an article published by American Physical Society in " Physical Review Letters 111(6)", available at: https://doi.org/10.1103/PhysRevLett.111.062004Este es el manuscrito aceptado del artículo publicado por American Physical Society en "Physical Review Letters 111(6)", disponible en línea: https://doi.org/10.1103/PhysRevLett.111.062004A precision measurement of the differential cross sections 𝑑⁢𝜎/𝑑⁢𝛺 and the linearly polarized photon asymmetry 𝛴 ≡(𝑑⁢𝜎⊥ −𝑑⁢𝜎∥)/(𝑑⁢𝜎⊥ +𝑑⁢𝜎∥) for the →𝛾⁢𝑝 →𝜋0⁢𝑝 reaction in the near-threshold region has been performed with a tagged photon beam and almost 4⁢𝜋 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.eninfo:eu-repo/semantics/openAccessartículo