This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2010-11047-4 in citations.
Please use the identifier: http://hdl.handle.net/2128/10320 in citations.
Evaluation of the polarization observables IS and IC in the reaction gammapi - pi0eta p
Evaluation of the polarization observables IS and IC in the reaction gammapi - pi0eta p
We evaluate the polarization observables I-S and I-C for the reaction gamma p -> pi(0)eta p, using a chiral unitary framework developed earlier. The I-S and I-C observables have been recently measured for the first time by the CBELSA/TAPS Collaboration. The theoretical predictions of I-S and I-C,...
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Personal Name(s): | Doering, M. |
---|---|
Oset, E. / Meißner, U.-G. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 |
Published in: | The @European physical journal / A, 46 (2010) S. 315 - 323 |
Imprint: |
Berlin
Springer
2010
|
Physical Description: |
315 - 323 |
DOI: |
10.1140/epja/i2010-11047-4 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
European Physical Journal A
46 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10320 in citations.
We evaluate the polarization observables I-S and I-C for the reaction gamma p -> pi(0)eta p, using a chiral unitary framework developed earlier. The I-S and I-C observables have been recently measured for the first time by the CBELSA/TAPS Collaboration. The theoretical predictions of I-S and I-C, given for altogether 18 angle-dependent functions, are in good agreement with the measurements. Also, the asymmetry d Sigma/dcos theta evaluated here agrees with the data. We show the importance of the Delta(1700) D-33-resonance and its S-wave decay into eta Delta(1232). The result can be considered as a further confirmation of the dynamical nature of this resonance. At the highest energies, deviations of the predictions from the data start to become noticeable, which leaves room for additional processes and resonances such as a Delta(1940) D-33. We also point out how to further improve the calculation. |