This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2007-10371-0 in citations.
Please use the identifier: http://hdl.handle.net/2128/10526 in citations.
The Radiative decay of the Lambda(1405) and its two-pole structure
The Radiative decay of the Lambda(1405) and its two-pole structure
We evaluate theoretically the radiative decay widths into gamma Lambda and gamma Sigma(0) of the two poles' of the A(1405) found in chiral unitary theories and we find quite different results for each of the two poles. We show that, depending on which reaction is used to measure the A(1405) rad...
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Personal Name(s): | Döring, M. |
---|---|
Geng, L. S. / Oset, E. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 |
Published in: | The @European physical journal / A, 32 (2007) S. 201 - 211 |
Imprint: |
Berlin
Springer
2007
|
Physical Description: |
201 - 211 |
DOI: |
10.1140/epja/i2007-10371-0 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
European Physical Journal A
32 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10526 in citations.
We evaluate theoretically the radiative decay widths into gamma Lambda and gamma Sigma(0) of the two poles' of the A(1405) found in chiral unitary theories and we find quite different results for each of the two poles. We show that, depending on which reaction is used to measure the A(1405) radiative decays, one gives more weight to one or the other pole, resulting in quite different shapes in the gamma Lambda(Sigma(0)) invariant-mass distributions. Our results for the high-energy pole agree with those of the empirical determination of the gamma Lambda and gamma Sigma(0) radiative widths (based on an isobar model fitting of the K-p atom data), which are sometimes referred to as "experimental data". We have made a detailed study of the K(-)p -> pi(0)gamma Lambda(Sigma(0)) and pi(-)rho -> K-0 gamma Lambda(Sigma(0)) reactions and have shown that they, indeed, lead to different shapes for the -yA(ZO) invariant-mass distributions. |