Accurate test of chiral dynamics in the γpâπ0p reaction.
Phys Rev Lett
; 111(6): 062004, 2013 Aug 09.
Article
em En
| MEDLINE
| ID: mdl-23971564
ABSTRACT
A precision measurement of the differential cross sections dσ/dΩ and the linearly polarized photon asymmetry Σ≡(dσâ¥-dσâ¥)/(dσâ¥+dσâ¥) for the γpâπ0p 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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Canadá