This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevC.81.045208 in citations.
Please use the identifier: http://hdl.handle.net/2128/10322 in citations.
Energy dependence of the pp->K+nSigma+ reaction close to threshold
Energy dependence of the pp->K+nSigma+ reaction close to threshold
Production of the Sigma(+) hyperon through the pp -> K(+)n Sigma(+) reaction has been investigated at four energies close to threshold, 1.826, 1.920, 1.958, and 2.020 GeV. At low energies, correlated K+pi(+) pairs can only originate from Sigma(+) production so their measurement allows the total c...
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Personal Name(s): | Valdau, Yu. |
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Barsov, S. / Büscher, M. / Chiladze, D. / Dymov, S. / Dzyuba, A. / Hartmann, M. / Kacharava, A. / Keshelashvili, I. / Khoukaz, A. / Koptev, V. / Kulessa, P. / Merzliakov, S. / Mielke, M. / Mikirtychiants, S. / Nekipelov, M. / Ohm, H. / Papenbrock, M. / Rathmann, F. / Serdyuk, V. / Ströher, H. / Trusov, S. / Wilkin, C. | |
Contributing Institute: |
Experimentelle Hadrondynamik; IKP-2 |
Published in: | Physical Review C Physical review / C, 81 81 (2010 2010) 4 4, S. 045208 045208 |
Imprint: |
Woodbury, NY
Inst.
2010
2010-04-23 2010-04-01 |
Physical Description: |
045208 |
DOI: |
10.1103/PhysRevC.81.045208 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physical Review C
81 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10322 in citations.
Production of the Sigma(+) hyperon through the pp -> K(+)n Sigma(+) reaction has been investigated at four energies close to threshold, 1.826, 1.920, 1.958, and 2.020 GeV. At low energies, correlated K+pi(+) pairs can only originate from Sigma(+) production so their measurement allows the total cross section for the reaction to be determined. The results obtained are completely consistent with the values extracted from the study of the K+-proton correlation spectra obtained in the same experiment. These spectra, as well as the inclusive K+ momentum distributions, also provide conservative upper limits on Sigma(+) production rates. The measurements show a Sigma(+) production cross section that varies roughly like phase space, and, in particular, none of the three experimental approaches used supports the anomalously high, near-threshold pp -> K(+)n Sigma(+) total cross section previously reported [T. Rozek et al., Phys. Lett. B 643, 251 (2006)]. |