Accurate Test of Chiral Dynamics in the [→ over y]p→π[superscript 0]p Reaction
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Hornidge_Accurate-test-of-chiral.pdf
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255.88 KB
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Checksum (MD5)
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Author(s)
Bernstein, Aron M.
Date Issued
August 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Hornidge, D. et al. “Accurate Test of Chiral Dynamics in the γ[over →]p→π^{0}p Reaction.” Physical Review Letters 111.6 (2013). © 2013 American Physical Society
Version
Final published version
Abstract
A precision measurement of the differential cross sections dσ/dΩ and the linearly polarized photon asymmetry Σ≡(dσ[subscript ⊥]-dσ[subscript ∥])/(dσ[subscript ⊥]+dσ[subscript ∥]) for the γ⃗p→π[superscript 0]p 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.062004
