This title appears in the Scientific Report :
2006
Please use the identifier:
http://hdl.handle.net/2128/10570 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2006.07.066 in citations.
Threshold hyperon production in proton-proton collisions at COSY-11
Threshold hyperon production in proton-proton collisions at COSY-11
The Sigma(+) hyperon production was measured at the COSY-11 spectrometer via the pp -> nK(+)Sigma(+) reaction at excess energies of Q = 13 MeV and Q = 60 MeV. These measurements continue systematic hyperon production studies via the pp -> pK(+)Lambda/Sigma(0) reactions where a strong decrease...
Saved in:
Personal Name(s): | Rozek, T. |
---|---|
Grzonka, D. / Adam, H. H. / Budzanowski, A. / Czyzykiewicz, R. / Janusz, M. / Jarczyk, L. / Kamys, B. / Khoukaz, A. / Kilian, K. / Klaja, P. / Kowina, P. / Moskal, P. / Oelert, W. / Piskor-Ignatowicz, C. / Przerwa, J. / Ritman, J. / Sefzick, T. / Siemaszko, M. / Smyrski, J. / Täschner, A. / Winter, P. / Wolke, M. / Wüstner, P. / Zhang, Z. / Zipper, W. | |
Contributing Institute: |
Institut 1 (Experimentelle Kernphysik I); IKP-E-I |
Published in: | Physics letters / B, 643 (2006) S. 251 - 256 |
Imprint: |
Amsterdam
North-Holland Publ.
2006
|
Physical Description: |
251 - 256 |
DOI: |
10.1016/j.physletb.2006.07.066 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physics Letters B
643 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2006.07.066 in citations.
The Sigma(+) hyperon production was measured at the COSY-11 spectrometer via the pp -> nK(+)Sigma(+) reaction at excess energies of Q = 13 MeV and Q = 60 MeV. These measurements continue systematic hyperon production studies via the pp -> pK(+)Lambda/Sigma(0) reactions where a strong decrease of the cross section ratio close-to-threshold was observed. In order to verify models developed for the description of the Lambda and Sigma(0) production we have performed the measurement on the Sigma(+) hyperon and found unexpectedly that the total cross section is by more than one order of magnitude larger than predicted by all anticipated models. After the reconstruction of the kaon and neutron four momenta, the Sigma(+) is identified via the missing mass technique. Details of the method and the measurement will be given and discussed in view of theoretical models. (c) 2006 Elsevier B.V. All rights reserved. |