Skip to main content
SpringerLink
Log in

On the ΣN cusp in the pp → pK+Λ reaction

  • Regular Article - Experimental Physics
  • Published:
The European Physical Journal A Aims and scope Submit manuscript

Abstract

Measurements of the pp → pK + Λ reaction at T p = 2.28 GeV have been carried out at COSY-TOF. In addition to the Λp FSI and N * resonance excitation effects a pronounced narrow structure is observed in the Dalitz plot and in its projection on the pΛ invariant mass. The strongly asymmetric structure appears at the pp → NK + Σ threshold and is interpreted as the ΣN cusp effect. The observed width of about 20 MeV/c 2 is substantially broader than anticipated from previous measurements as well as theoretical predictions. Angular distributions of this cusp structure are shown to be dissimilar to those in the residual pK + Λ channel, but similar to those observed in the pK + Σ 0 channel.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. A. Budzanowski et al., Phys. Lett. B 687, 31 (2010).

    Article  ADS  Google Scholar 

  2. M. Abdel-Bary et al., Eur. Phys. J. A 46, 27 (2010) 46.

    Article  ADS  Google Scholar 

  3. M. Abdel-Bary et al., Eur. Phys. J. A 48, 23 (2012).

    Article  ADS  Google Scholar 

  4. S. Abd El-Samad et al., Phys. Lett. B 688, 142 (2010).

    Article  ADS  Google Scholar 

  5. S. Abd El-Samad et al., Phys. Lett. B 632, 27 (2006).

    Article  ADS  Google Scholar 

  6. R. Bilger et al., Phys. Lett. B 420, 217 (1998).

    Article  ADS  Google Scholar 

  7. M. Abdel-Bary et al., Phys. Lett. B 649, 252 (2007).

    Article  ADS  Google Scholar 

  8. M. Abdel-Bary et al., Phys. Lett. B 595, 127 (2004).

    Article  ADS  Google Scholar 

  9. M. Nekipelov et al., J. Phys. G 34, 627 (2007).

    Article  ADS  Google Scholar 

  10. A. Budzanowski et al., Phys. Rev. D 84, 032002 (2011) arXiv:1105.2281 [hep-ex].

    Article  ADS  Google Scholar 

  11. T. Yamazaki et al., Phys. Rev. Lett. 104, 132502 (2010).

    Article  ADS  Google Scholar 

  12. J. Gasser, B. Kubis, A. Rusetsky, Nucl. Phys. B 850, 96 (2011) arXiv:1103.4273 [hep-ph].

    Article  ADS  MATH  Google Scholar 

  13. R. Siebert et al., Nucl. Phys. A 567, 819 (1994).

    Article  ADS  Google Scholar 

  14. A. Budzanowski et al., Phys. Lett. B 692, 10 (2010).

    Article  ADS  Google Scholar 

  15. J.M. Laget, Phys. Lett. B 259, 24 (1991).

    Article  ADS  Google Scholar 

  16. O.I. Dahl et al., Phys. Rev. Lett. 6, 142 (1961).

    Article  ADS  Google Scholar 

  17. T.H. Tan, Phys. Rev. Lett. 23, 395 (1969).

    Article  ADS  Google Scholar 

  18. O. Braun et al., Nucl. Phys. B 124, 45 (1977).

    Article  ADS  Google Scholar 

  19. R.H. Dalitz, Nucl. Phys. A 354, 101c (1981).

    Article  ADS  Google Scholar 

  20. A.M. Badalyan, L.P. Kok, M.I. Polikarpov, Yu.A. Simonov, Phys. Rep. 82, 31 (1982).

    Article  ADS  Google Scholar 

  21. G. Toker, A. Gal, J.M. Eisenberg, Nucl. Phys. A 362, 405 (1981).

    Article  ADS  Google Scholar 

  22. M. Torres, R.H. Dalitz, A. Deloff, Phys. Lett. B 174, 213 (1986).

    Article  ADS  Google Scholar 

  23. K. Ehrhardt, PhD Thesis, Universität Tübingen (2011), http://tobias-lib.uni-tuebingen.de/volltexte/2012/6021/pdf/final_thesis_color.pdf.

  24. COSY-TOF Collaboration (E. Borodina), in preparation, and M. Röder, PhD Thesis, Ruhr-Universität Bochum (2012).

  25. D. Albers et al., Phys. Rev. Lett. 78, 1652 (1997).

    Article  ADS  Google Scholar 

  26. R.A. Arndt et al., Phys. Rev. C 76, 025209 (2007) SAID data base http://gwdac.phys.gwu.edu/.

    Article  ADS  Google Scholar 

  27. Particle Data Group, Phys. Rev. D 86, 010001 (2012).

    Article  Google Scholar 

  28. A. Sibirtsev, J. Haidenbauer, H.-W. Hammer, S. Krewald, Eur. Phys. J. A 27, 269 (2006).

    Article  ADS  Google Scholar 

  29. S.M. Flatteé, Phys. Lett. B 63, 224 (1976).

    Article  ADS  Google Scholar 

  30. A. Sibirtsev, in preparation.

  31. H. Machner et al., Nucl. Phys. A 901, 65 (2013).

    Article  Google Scholar 

  32. M. Abdel-Bary et al., Eur. Phys. J. A 16, 127 (2003).

    Article  ADS  Google Scholar 

  33. R. Dzhygadlo, PhD Thesis, Universität Bonn (2012).

Download references

Author information

Author notes

  1. W. Schroeder

    Present address: Forschungszentrum Jülich, D-52428, Jülich, Germany

Authors and Affiliations

  1. Atomic Energy Authority NRC Cairo, Cairo, Egypt

    S. Abd El-Samad

  2. Institut für Kernphysik, Forschungszentrum Jülich, D-52428, Jülich, Germany

    E. Borodina, R. Dzhygadlo, W. Gast, A. Gillitzer, D. Grzonka, C. Hanhart, F. Hauenstein, P. Klaja, K. Kilian, J. Ritman, E. Roderburg, M. Röder, W. Schroeder, T. Sefzick, P. Wintz & P. Wüstner

  3. Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52428, Jülich, Germany

    E. Borodina, R. Dzhygadlo, W. Gast, A. Gillitzer, D. Grzonka, C. Hanhart, F. Hauenstein, P. Klaja, K. Kilian, J. Ritman, E. Roderburg, M. Röder, W. Schroeder, T. Sefzick, P. Wintz & P. Wüstner

  4. Physikalisches Institut Justus-Liebig-Universität, D-35392, Gießen, Germany

    K. -Th. Brinkmann

  5. Physikalisches Institut der Universität Tübingen, Tübingen, Germany

    H. Clement, E. Doroshkevich, K. Ehrhardt, A. Erhardt & G. J. Wagner

  6. Kepler Center for Astro and Particle Physics, University of Tübingen, Auf der Morgenstelle 14, D-72076, Tübingen, Germany

    H. Clement, E. Doroshkevich, K. Ehrhardt, A. Erhardt & G. J. Wagner

  7. Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058, Erlangen, Germany

    W. Eyrich, F. Hauenstein, P. Klaja, M. Krapp, M. Schulte-Wissermann & W. Schroeder

  8. Institut für Kern- und Teilchenphysik, Technische Universität Dresden, D-01062, Dresden, Germany

    H. Freiesleben

  9. Institute for Advanced Simulation, Forschungszentrum Jülich, D-52428, Jülich, Germany

    C. Hanhart

  10. Zentralinstitut für Elektronik, Forschungszentrum Jülich, D-52428, Jülich, Germany

    P. Wüstner

Authors
  1. S. Abd El-Samad
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. E. Borodina
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. K. -Th. Brinkmann
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. H. Clement
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. E. Doroshkevich
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. R. Dzhygadlo
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. K. Ehrhardt
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. A. Erhardt
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. W. Eyrich
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. H. Freiesleben
    View author publications

    You can also search for this author in PubMed Google Scholar

  11. W. Gast
    View author publications

    You can also search for this author in PubMed Google Scholar

  12. A. Gillitzer
    View author publications

    You can also search for this author in PubMed Google Scholar

  13. D. Grzonka
    View author publications

    You can also search for this author in PubMed Google Scholar

  14. C. Hanhart
    View author publications

    You can also search for this author in PubMed Google Scholar

  15. F. Hauenstein
    View author publications

    You can also search for this author in PubMed Google Scholar

  16. P. Klaja
    View author publications

    You can also search for this author in PubMed Google Scholar

  17. K. Kilian
    View author publications

    You can also search for this author in PubMed Google Scholar

  18. M. Krapp
    View author publications

    You can also search for this author in PubMed Google Scholar

  19. J. Ritman
    View author publications

    You can also search for this author in PubMed Google Scholar

  20. E. Roderburg
    View author publications

    You can also search for this author in PubMed Google Scholar

  21. M. Röder
    View author publications

    You can also search for this author in PubMed Google Scholar

  22. M. Schulte-Wissermann
    View author publications

    You can also search for this author in PubMed Google Scholar

  23. W. Schroeder
    View author publications

    You can also search for this author in PubMed Google Scholar

  24. T. Sefzick
    View author publications

    You can also search for this author in PubMed Google Scholar

  25. G. J. Wagner
    View author publications

    You can also search for this author in PubMed Google Scholar

  26. P. Wintz
    View author publications

    You can also search for this author in PubMed Google Scholar

  27. P. Wüstner
    View author publications

    You can also search for this author in PubMed Google Scholar

Consortia

COSY-TOF Collaboration

Corresponding author

Correspondence to H. Clement.

Additional information

Communicated by T. Hennino

Rights and permissions

Reprints and permissions

About this article

Cite this article

COSY-TOF Collaboration., Abd El-Samad, S., Borodina, E. et al. On the ΣN cusp in the pp → pK+Λ reaction. Eur. Phys. J. A 49, 41 (2013). https://doi.org/10.1140/epja/i2013-13041-8

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1140/epja/i2013-13041-8

Keywords

Search

Navigation