Application of Straw Tube Detectors to Hyperon Studies

• Authors: S. Jowzaee
• Languages of publication: EN

Abstracts

EN

A high statistics measurement of the p̅p → pK⁺Λ reaction was done with the COSY-TOF experiment. The proton beam was polarized up to more than 80%, and its momentum was 2.95 GeV/c. The reconstruction of the pK⁺Λ events was done only with the straw tube tracker due to the higher spatial resolution of the straw tube tracker compared to other subdetectors. The Dalitz plot of the pK⁺Λ events was analyzed to understand the reaction mechanism and presented in this paper. The Dalitz plot shows that the COSY-TOF experiment provides complete kinematic coverage of the phase space of this reaction which made it ideal for p̅p → pK⁺Λ reaction analysis. The influence of different physical effects as pΛ final state interaction, excited nucleon states (N*-resonances) and a coupled channel effect of NΣ-pΛ (NΣ cusp effect) produce significant structures in the Dalitz plot. The angular distribution of the particles in the CMS and helicity frame was also presented in this paper.

Keywords

EN

14.20.Jn; 13.75.Cs; 29.40.Gx

Discipline

• 29.40.Gx: Tracking and position-sensitive detectors
• 14.20.Jn: Hyperons
• 13.75.Cs: Nucleon-nucleon interactions (including antinucleons, deuterons, etc.)(forN-Ninteractions in nuclei, see 21.30.-x)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 5
• Pages: 1531-1532

Dates

published

2015-05

Contributors

author

S. Jowzaee

• Institute of Physics, Jagiellonian University, St. Łojasiewicza 11, 30-348 Kraków, Poland
• Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52428 Jülich, Germany

References

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• [2] S. Jowzaee, Ph.D. Thesis, Jagiellonian University, Kraków 2014
• [3] F. Hauenstein, Ph.D. Thesis, University of Erlangen-Nürnberg, 2014
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• [5] S. Abd El-Samad, E. Borodina, K.-Th. Brinkmann, H. Clement, E. Doroshkevich, R. Dzhygadlo, K. Ehrhardt, A. Erhardt, W. Eyrich, H. Freiesleben, W. Gast, A. Gillitzer, D. Grzonka, C. Hanhart, F. Hauenstein, P. Klaja, K. Kilian, M. Krapp, J. Ritman, E. Roderburg, M. Röder, M. Schulte-Wissermann, W. Schroeder, T. Sefzick, G.J. Wagner, P. Wintz, P. Wüstner, Eur. Phys. J. A 49, 41 (2013), doi: 10.1140/epja/i2013-13041-8
• [6] S. Jowzaee et al., to be published, 2015

Identifiers

DOI

10.12693/APhysPolA.127.1531