Skip to main content
Log in

Searches for supersymmetric particles in e + e- collisions up to 208 GeV and interpretation of the results within the MSSM

  • experimental physics
  • Published:
The European Physical Journal C - Particles and Fields Aims and scope Submit manuscript

Abstract.

DELPHI data collected at centre-of-mass energies up to 208 GeV have been analysed to search for charginos, neutralinos and sfermions in the framework of the Minimal Supersymmetric Standard Model (MSSM) with R-parity conservation. No evidence for a signal was found in any of the channels. The results of each search were used to derive limits on production cross-sections and particle masses. In addition, the combined result of all searches excludes regions in the parameter space of the constrained MSSM, leading to limits on the mass of the Lightest Supersymmetric Particle and other supersymmetric particles.

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

Access this article

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

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. P. Fayet and S. Ferrara, Phys. Rev. 32, 249 (1977)

    Google Scholar 

  2. DELPHI Coll., P. Abreu, Eur. Phys. J. C 19, 29 (2001)

    Google Scholar 

  3. DELPHI Coll., P. Abreu, Phys. Lett. B 496, 59 (2000)

    Article  Google Scholar 

  4. DELPHI Coll., P. Abreu, Phys. Lett. B 479, 118 (2000)

    Article  Google Scholar 

  5. DELPHI Coll., J. Abdallah, Eur. Phys. J. C 27, 153 (2003)

    Google Scholar 

  6. DELPHI Coll., P. Abreu, Phys. Lett. B 485, 95 (2000)

    Article  Google Scholar 

  7. DELPHI Coll., P. Abreu, Eur. Phys. J. C 19, 201 (2001)

    Google Scholar 

  8. DELPHI Coll., P. Abreu, Phys. Lett. B 489, 38 (2000)

    Article  Google Scholar 

  9. M. Espirito Santo, K. Hultqvist, P. Johansson, A. Lipniacka, F. Mazzucato, Limits on the masses of supersymmetric particles at \(\sqrt{s}\) up to 202 GeV,CERN-OPEN-2002-014

  10. R. Arnowitt, A. Chamseddine and P. Nath, N=1 Supergravity, World Scientific, Singapore, 1984

  11. DELPHI Coll., Final results from DELPHI on the searches for SM and MSSM Neutral Higgs bosons, EP 2003-008 (11 February 2003), Submitted to Eur. Phys. J. C.

  12. C.H. Chen, M. Drees, J.F. Gunion, Phys. Rev. D 55, 330 (1997)

    Article  Google Scholar 

  13. DELPHI Coll., P. Aarnio, Nucl. Instr. and Meth. 303, 233 (1991)

    Google Scholar 

  14. P. Rebecchi, Optimisation de l’herméticité du détecteur DELPHI pour la recherche de particules supersymétriques á LEP2, Ph.D. thesis, LAL 96-30 (May 1996), Université Paris XI Orsay, CERN THESIS-96-003

  15. T. Sjöstrand, Comp. Phys. Comm. 39, 347 (1986)

    Google Scholar 

  16. J.E. Campagne and R. Zitoun, Z. Phys. C 43, 469 (1989)

    Google Scholar 

  17. S. Jadach, B.F.L. Ward and Z. Was, Comp. Phys. Comm. 79, 503 (1994)

    Article  Google Scholar 

  18. S. Jadach, W. Placzek and B.F.L. Ward, Phys. Lett. B 390, 298 (1997)

    Article  Google Scholar 

  19. F.A. Berends, R. Pittau, R. Kleiss, Comp. Phys. Comm. 85, 437 (1995)

    Article  Google Scholar 

  20. J.Fujimoto, Comp. Phys. Comm. 100, 128 (1997)

    Article  Google Scholar 

  21. S. Nova, A. Olshevski, and T. Todorov, A Monte Carlo event generator for two photon physics, DELPHI note 90-35 (1990)

  22. R. Engel, Z. Phys. C 66, 203 (1995)

    Google Scholar 

  23. F.A. Berends, P.H. Daverveldt, R. Kleiss, Comp. Phys. Comm. 40, 271 (1986), Comp. Phys. Comm. 40, 285 (1986), Comp. Phys. Comm. 40, 309 (1986)

    Article  Google Scholar 

  24. S.Katsanevas and P.Morawitz, Comp. Phys. Comm. 112, 227 (1998)

    Article  MATH  Google Scholar 

  25. G. Altarelli, Physics at LEP2, Yellow Report CERN 96-01, vol. 2. (1996)

  26. DELPHI Coll., P. Abreu, Z. Phys. C 73, 11 (1996)

    Article  Google Scholar 

  27. R. Keranen, A. Sopczak, H. Nowak, M. Berggren, E. Phys. J. C7 (2000) 1

  28. S. Catani, Phys. Lett. B 269, 432 (1991)

    Article  Google Scholar 

  29. F. Cossutti, A. Tonazzo, F. Mazzucato, REMCLU: a package for the Reconstruction of Electromagnetic CLUsters at LEP200, DELPHI note 2000-164 PROG 242 (2000)

  30. DELPHI Coll., P. Abreu, Z. Phys. C 70, 531 (1996)

    Article  Google Scholar 

  31. J. Neyman and K.Pearson, Phil. Trans. R. Soc. A 231, 289 (1933)

    MATH  Google Scholar 

  32. A. Zell, SNNS user manual : Version 4.1 (1995), “http://www.ra.informatik.uni-tuebingen.de/SNNS/”

  33. A. Read, 1st Workshop on Confidence Limits, Yellow report CERN 2000-005, (May 2000) 81-103

  34. DELPHI Coll., P. Abreu, Phys. Lett. B 444, 491 (1998)

    Article  Google Scholar 

  35. T. Alderweireld, Search for charginos in e+e- interactions with the DELPHI detector at LEP, Ph.D. thesis, Université de Mons (Sept. 2002), CERN-THESIS-03-009

  36. A.V. Oppenheim and R.W. Schafer, Discrete-time signal processing, Prentice-Hall, 1989

  37. Particle Data Group, R.M. Barnett, Phys. Rev. D 54 (1996)

  38. V.F. Obraztsov, Nucl. Instr. and Meth. 316, 388 (1992)

    Article  Google Scholar 

  39. S. Jadach, LEP2 Monte Carlo Workshop : Report of the Working Groups on Precision Calculations for LEP2 Physics, Yellow Report CERN 2000-009, (September 2000)

  40. T. Alderweireld, S. Todorovova and P. Verdier, Study of the hadronic \(\gamma\gamma\) interactions at \(\sqrt{s}=\)200GeV, CERN-OPEN-2002-032

  41. DELPHI, Coll., J. Abdallah, Z Z production in e + e - interactions at \(\sqrt{s}\) = 183-209 GeV, to be submitted to E. Phys. J. C

  42. A. Perrotta, Int. J. Mod. Phys. C 13, 989 (2002)

    Article  Google Scholar 

  43. ALEPH Coll., D.Decamp, Phys. Rev. 216, 253 (1992)

    Google Scholar 

  44. DELPHI Coll., P. Abreu, Eur. Phys. J. C 16, 371 (2000): ALEPH, DELPHI, L3, OPAL Coll., D. Abbaneo, A combination of preliminary electroweak measurements and constraints on the Standard Model, CERN-EP/2001-098

    Google Scholar 

  45. Particle Data Group, J. Bartels, Eur. Phys. J. C 15, 1 (2000)

    Google Scholar 

  46. K.Mönig, Model independent limit of the Z-decay-width into unknown particles, CERN-OPEN-97-040 and DELPHI 97-174 PHYS 748

  47. ASP Collaboration: C. Hearty, Phys. Rev. D 39, 3207 (1989)

    Article  Google Scholar 

  48. A. Bartl, Z. Phys. C 76, 549 (1997)

    Article  Google Scholar 

  49. M. Frank, hep-ph/0212037

  50. DELPHI Coll.,Searches for Invisibly decaying Higgs bosons with the DELPHI detector at LEP, to be submitted to E. Phys. J. C.

  51. D. Pierce and A. Papadopoulos, Phys. Rev. D 50, 565 (1994)

    Article  Google Scholar 

  52. Graham D. Kribs, Nucl. Phys. B 535, 41 (1998)

    Article  Google Scholar 

  53. ALEPH Coll., D. Abbaneo, Phys. Lett. B 499, 67 (2001)

    Article  Google Scholar 

Download references

Author information

Consortia

Additional information

Received: 22 February 2003, Revised: 24 July 2003, Published online: 12 November 2003

Rights and permissions

Reprints and permissions

About this article

Cite this article

The DELPHI Collaboration. Searches for supersymmetric particles in e + e- collisions up to 208 GeV and interpretation of the results within the MSSM. Eur. Phys. J. C 31, 421–479 (2003). https://doi.org/10.1140/epjc/s2003-01355-5

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1140/epjc/s2003-01355-5

Keywords

Navigation