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Multi-photon final states in e+e collisions at ∝s =130-172 GeV

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Abstract

The process e+e →, γγ(γ) is studied using data recorded with the OPAL detector at LEP. The data sample corresponds to a total integrated luminosity of 25.38 pb−1 taken at centre-of-mass energies of 130–172 GeV. The measured cross-sections agree well with the expectation from QED. In a combined fit using data from all centre-of-mass energies, the angular distribution is used to obtain improved limits on the cut-off parameters: Λ+ > 195 GeV and Λ > 210 GeV (95% CL). In addition, limits on nonstandard e+eγ couplings and contact interactions, as well as a 95% CL mass limit for an excited electron,Me*= > 194 GeV for an e+eγ coupling κ = 1, are determined.

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References

  1. OPAL Collaboration, G. Alexander et al., Phys. Lett.B377 (1996) 222

    Article  ADS  Google Scholar 

  2. OPAL Collaboration, K. Ackerstaff et al., Phys. Lett.B391 (1997) 210

    ADS  Google Scholar 

  3. OPAL Collaboration, K. Ahmet et al., Nucl. Instr. and Meth.A305 (1991) 275

    ADS  Google Scholar 

  4. F.A. Berends and R. Kleiss, Nucl. Phys.B186 (1981) 22

    Article  ADS  Google Scholar 

  5. S. Jadach et al., Phys. Lett.390 (1997) 298

    Article  Google Scholar 

  6. D. Karlen, Nucl. Phys.B289 (1987) 23

    Article  ADS  Google Scholar 

  7. G. Montagna et al., Nucl. Phys.B452 (1996) 161

    ADS  Google Scholar 

  8. S. Jadach et al., Comp. Phys. Comm.66 (1991) 276

    Article  ADS  MATH  Google Scholar 

  9. T. Sjöstrand and M. Bengtsson, Comp. Phys. Comm.43 (1987) 367;

    Article  ADS  Google Scholar 

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

    Article  ADS  Google Scholar 

  11. OPAL Collaboration, J. Allison et al., Nucl. Instr. and Meth.A317 (1992) 47

    Article  ADS  Google Scholar 

  12. I. Harris and L.M. Brown, Phys. Rev.105 (1957) 1656;

    Article  ADS  MATH  Google Scholar 

  13. F.A. Berends and R. Gastmans, Nucl. Phys.B61 (1973) 414

    Article  ADS  Google Scholar 

  14. S.D. Drell, Ann. Phys.4 (1958) 75

    Article  ADS  MATH  Google Scholar 

  15. O.J.P. Éboli, A.A. Natale and S.F. Novaes, Phys. Lett.B271 (1991) 274

    Article  ADS  Google Scholar 

  16. A. Litke, Ph.D. Thesis, Harvard University, unpublished (1970)

  17. G.D. Lafferty and T.R. Wyatt, Nucl. Instrum. Meth.A355 (1995) 541

    Article  ADS  Google Scholar 

  18. MINUIT Reference Manual, F. James and M. Roos, CERN Program LibraryD506

  19. Review of Particle Physics, R.M. Barnett et al., Phys. Rev.D54 (1996) 1

    ADS  Google Scholar 

  20. PLUTO Collaboration, C. Berger et al., Phys. Lett.B59 (1980) 87;

    Article  ADS  Google Scholar 

  21. JADE Collaboration, W. Bartel et al., Z. Phys. C19 (1983) 197;

    ADS  Google Scholar 

  22. MARKJ Collaboration, B. Adeva et al., Phys. Rev. Lett.53 (1984) 134;

    Article  ADS  Google Scholar 

  23. TASSO Collaboration, M. Althoff et al., Z. Phys.C26 (1984) 337;.

    ADS  Google Scholar 

  24. CELLO Collaboration, H.J. Behrend et al., Phys. LettB168 (1986) 420;

    Article  ADS  Google Scholar 

  25. HRS Collaboration, M. Derrick et al., Phys. Rev.D34 (1986) 3286;

    ADS  Google Scholar 

  26. MAC Collaboration, E. Fernandez et al., Phys Rev.D35 (1987) 1;

    ADS  Google Scholar 

  27. AMY Collaboration, H.J. Kim, et al., KEK preprint89–52 (1989);

  28. VENUS Collaboration, K. Abe et al., Z. Phys.C45 (1989) 175;

    Google Scholar 

  29. TOPAZ Collaboration, K. Shimozawa et al., Phys. Lett. B284 (1992) 144;

    Article  ADS  Google Scholar 

  30. ALEPH Collaboration, D. Buskulic et al., Z. Phys.C59 (1993) 215;

    ADS  Google Scholar 

  31. DELPHI Collaboration, P. Abreu et al., Phys. Lett.B268 (1991) 296;

    Article  ADS  Google Scholar 

  32. L3 Collaboration, O. Adriani et al., Phys. Lett.B288 (1992) 404

    Article  ADS  Google Scholar 

  33. OPAL Collaboration, M.Z. Akrawy et al., Phys. LettB257 (1991) 531

    Article  ADS  Google Scholar 

  34. ALEPH Collaboration, D. Buskulic et al., Phys. Lett.B384 (1996) 333

    Article  ADS  Google Scholar 

  35. L3 Collaboration, M. Acciarri et al., Phys. Lett.B384 (1996) 323

    Article  ADS  Google Scholar 

  36. L3 Collaboration, M. Acciarri et al., CERN-PPE/97-77, submitted to Phys. Lett.

  37. OPAL Collaboration, P.D. Acton et al., Phys. LettB311 (1993) 391;

    Article  ADS  Google Scholar 

  38. L3 Collaboration, M. Acciarri et al., Phys. Lett.B345 (1995) 609

    Article  ADS  Google Scholar 

  39. P. Bock, Determination of Exclusion Limits for Particle Production Using Different Decay Channels with Different Energies, Mass Resolutions and Backgrounds, submitted to Nucl. Instrum. Meth. (1997)

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The OPAL Collaboration., Ackerstaff, K., Alexander, G. et al. Multi-photon final states in e+e collisions at ∝s =130-172 GeV. Eur. Phys. J. C 1, 21–30 (1998). https://doi.org/10.1007/BF01245795

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