Journal
PHYSICAL REVIEW C
Volume 87, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.87.025201
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Funding
- LIP Coimbra, Coimbra, Portugal [PTDC/FIS/113339/2009]
- SIP JUC Cracow, Cracow, Poland [N N202 286038 28-JAN-2010, NN202198639 01-OCT-2010]
- FZ Dresden-Rossendorf (FZD), Dresden, Germany [BMBF 06DR9059D]
- TU Munchen, Garching, Germany
- MLL Munchen [DFG EClust 153, VH-NG-330 BMBF 06MT9156 TP5 GSI TMKrue 1012 NPI AS CR]
- Rez, Rez, Czech Republic [MSMT LC07050 GAASCR IAA100480803]
- USC-S. de Compostela, Santiago de Compostela, Spain [CPAN: CSD2007-00042]
- Goethe-University, Frankfurt, Germany [HA216/EMMI HIC, BMBF: 06FY9100I]
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We present an analysis of the Lambda(1405) resonance produced in the reaction p + p -> Sigma(+/-) + pi(-/+) + K+ + p at 3.5 GeV kinetic beam energy measured with the High Acceptance Dielectron Spectrometer (HADES) at the Gesellschaft fur Schwerionenforschung (GSI). The two charged decay channels Lambda (1405) -> Sigma(+/-) + pi(-/+) have been reconstructed for the first time in p + p collisions. The efficiency and acceptance- corrected spectral shapes show a peak position clearly below 1400MeV/c(2). We find a total production cross section of sigma(Lambda(1405)) = (1405) = 9.2 +/- 0.9 +/- 0.7(-1.0)(+3.3)mu b . The analysis of its polar angle distribution suggests that the Lambda(1405) is produced isotropically in the p - p center-of-mass system (CMS). DOI: 10.1103/ PhysRevC.87.025201
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