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29 March 2024
 
  » arxiv » 1208.0205

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Baryonic resonances close to the Kbar-N threshold: the case of Lambda(1405) in pp collisions
G. Agakishiev ; A. Balanda ; D. Belver ; A.V. Belyaev ; J. C. Berger-Chen ; A. Blanco ; M. Böhmer ; J.L. Boyard ; P. Cabanelas ; S. Chernenko ; A. Dybczak ; E. Epple ; L. Fabbietti ; P. Finocchiaro ; P. Fonte ; J. Friese ; I. Fröhlich ; T. Galatyuk ; J.A. Garzón ; R. Gernhäuser ; K. Göbel ; M. Golubeva ; D. González-Díaz ; F. Guber ; M. Gumberidze ; T. Heinz ; T. Hennino ; R. Holzmann ; A. Ierusalimov ; I. Iori ; A. Ivashkin ; M. Jurkovic ; B. Kämpfer ; T. Karavicheva ; I. Koenig ; W. Koenig ; B.W. Kolb ; G. Kornakov ; R. Kotte ; A. Krása ; F. Krizek ; R. Krücken ; H. Kuc ; W. Kühn ; A. Kugler ; A. Kurepin ; V. Ladygin ; R. Lalik ; S. Lang ; K. Lapidus ; A. Lebedev ; T. Liu ; L. Lopes ; M. Lorenz ; L. Maier ; A. Mangiarotti ; J. Markert ; V. Metag ; B. Michalska ; J. Michel ; C. Müntz ; L. Naumann ; Y.C. Pachmayer ; M. Palka ; Y. Parpottas ; V. Pechenov ; O. Pechenova ; J. Pietraszko ; W. Przygoda ; B. Ramstein ; A. Reshetin ; A. Rustamov ; A. Sadovsky ; P. Salabura ; A. Schmah ; E. Schwab ; J. Siebenson ; S. Spataro ; B. Spruck ; H. Ströbele ; J. Stroth ; C. Sturm ; A. Tarantola ; K. Teilab ; P. Tlusty ; M. Traxler ; R. Trebacz ; H. Tsertos ; T. Vasiliev ; V. Wagner ; M. Weber ; C. Wendisch ; J. Wüstenfel ; S. Yurevich ; Y.V. Zanevsky ;
Date 1 Aug 2012
AbstractWe present an analysis of the Lambda(1405) resonance produced in the reaction p+p->Sigma^{pm}+pi^{mp}+K+p at 3.5 GeV kinetic beam energy measured with HADES at GSI. The two charged decay channels Lambda(1405) -> Sigma^{pm}+pi^{mp} have been reconstructed for the first time in p+p collisions. The efficiency and acceptance-corrected spectral shapes show a peak position clearly below 1400 MeV/c^2. We find a total production cross section of sigma_{Lambda(1405)}=9.2 +- 0.9 +- 0.7 +3.3-1.0 mub. The analysis of its polar angle distribution suggests that the Lambda(1405) is produced isotropically in the p-p center of mass system.
Source arXiv, 1208.0205
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