This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.104.142503 in citations.
Please use the identifier: http://hdl.handle.net/2128/7250 in citations.
Precision determination of the dpi -> NN transition strength at threshold
Precision determination of the dpi -> NN transition strength at threshold
An unusual but effective way to determine at threshold the d pi <-> NN transition strength alpha is to exploit the hadronic ground-state broadening Gamma(1s) in pionic deuterium, accessible by x-ray spectroscopy. The broadening is dominated by the true absorption channel d pi(-) -> nn, whic...
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Personal Name(s): | Strauch, Th. |
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Amaro, F.D. / Anagnostopoulos, D.F. / Bühler, P. / Covita, D.S. / Gorke, H. / Gotta, D. / Gruber, A. / Hirtl, A. / Indelicato, P. / Le Bigot, E.-O. / Nekipelov, M. / dos Santos, J.M.F. / Schlesser, S. / Schmid, Ph. / Simons, L.M. / Trassinelli, M. / Veloso, J.F.C.A. / Zmeskal, J. | |
Contributing Institute: |
Experimentelle Hadrondynamik; IKP-2 |
Published in: | Physical review letters, 104 (2010) S. 142503 |
Imprint: |
College Park, Md.
APS
2010
|
Physical Description: |
142503 |
DOI: |
10.1103/PhysRevLett.104.142503 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physical Review Letters
104 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/7250 in citations.
An unusual but effective way to determine at threshold the d pi <-> NN transition strength alpha is to exploit the hadronic ground-state broadening Gamma(1s) in pionic deuterium, accessible by x-ray spectroscopy. The broadening is dominated by the true absorption channel d pi(-) -> nn, which is related to s-wave pion production pp -> d pi(+) by charge symmetry and detailed balance. Using the exotic atom circumvents the problem of Coulomb corrections to the cross section as necessary in the production experiments. Our dedicated measurement finds Gamma(1s) = (1171(-49)(+23)) meV yielding alpha = (252(-11)(+5)) mu b. |