TY - JOUR
T1 - Test of isospin symmetry via low-energy H1(π-,π0)n charge exchange
AU - Jia, Y.
AU - Gorringe, T. P.
AU - Hasinoff, M. D.
AU - Kovash, M. A.
AU - Ojha, M.
AU - Pavan, M. M.
AU - Tripathi, S.
AU - Zołnierczuk, P. A.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/9/5
Y1 - 2008/9/5
N2 - We report measurements of the π-p→π0n differential cross sections at six momenta (104-143MeV/c) and four angles (0°-40°) by detection of γ-ray pairs from π0→γγ decays using a photon-pair spectrometer at TRIUMF. This kinematic region exhibits a vanishing zero-degree cross section from destructive interference between s and p waves, thus yielding special sensitivity to pion-nucleon dynamics. Our data and previous data do not agree, with important implications for earlier claims of large isospin-violating effects.
AB - We report measurements of the π-p→π0n differential cross sections at six momenta (104-143MeV/c) and four angles (0°-40°) by detection of γ-ray pairs from π0→γγ decays using a photon-pair spectrometer at TRIUMF. This kinematic region exhibits a vanishing zero-degree cross section from destructive interference between s and p waves, thus yielding special sensitivity to pion-nucleon dynamics. Our data and previous data do not agree, with important implications for earlier claims of large isospin-violating effects.
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U2 - 10.1103/PhysRevLett.101.102301
DO - 10.1103/PhysRevLett.101.102301
M3 - Article
AN - SCOPUS:51649112453
SN - 0031-9007
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 102301
ER -