This title appears in the Scientific Report :
2008
Please use the identifier:
http://hdl.handle.net/2128/10518 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2008.01.002 in citations.
Lineshape of the Lambda (1405) hyperon measured through its Sigma+ pi0 decay
Lineshape of the Lambda (1405) hyperon measured through its Sigma+ pi0 decay
The pp --> pK(+)Y(0) reaction has been studied for hyperon masses m (Y-0) <= 1540 MeV/c(2) at COSY-Julich by using a 3.65 GeV/c circulating proton beam incident on an internal hydrogen target. Final states comprising two protons, one positively charged kaon and one negatively charged pion have...
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Personal Name(s): | Zychor, I. |
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Büscher, M. / Hartmann, M. / Kacharava, A. / Keshelashvili, I. / Khoukaz, A. / Kleber, V. / Koptev, V. / Maeda, Y. / Mersmann, T. / Mikirtychiants, S. / Schleichert, R. / Ströher, H. / Valdau, Yu. / Wilkin, C. | |
Contributing Institute: |
Experimentelle Hadrondynamik; IKP-2 Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM |
Published in: | Physics letters / B, 660 (2008) S. 167 - 171 |
Imprint: |
Amsterdam
North-Holland Publ.
2008
|
Physical Description: |
167 - 171 |
DOI: |
10.1016/j.physletb.2008.01.002 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physics Letters B
660 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2008.01.002 in citations.
The pp --> pK(+)Y(0) reaction has been studied for hyperon masses m (Y-0) <= 1540 MeV/c(2) at COSY-Julich by using a 3.65 GeV/c circulating proton beam incident on an internal hydrogen target. Final states comprising two protons, one positively charged kaon and one negatively charged pion have been identified with the ANKE spectrometer. Such configurations are sensitive to the production of the ground state Lambda and Sigma(0) hyperons as well as the Sigma(0)(1385) and Lambda(1405) resonances. Applying invariant- and missing-mass techniques, the two overlapping excited states could be well separated, though with limited statistics. The shape and position of the Lambda(1405) distribution, reconstructed cleanly in the Sigma(0)pi(0) channel, are similar to those found from other decay modes and there is no obvious mass shift. This finding constitutes a challenging test for models that predict Lambda( 1405) to be a two-state resonance. (C) 2008 Elsevier B.V. All rights reserved. |