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Search for lepton flavour number violating Z0- decays

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Zeitschrift für Physik C Particles and Fields

Abstract

A search for lepton flavour number violating Z0 decays in the channels Z 0 → μτ, Z 0 → eτ, Z 0 → eμ, using the DELPHI detector with data collected during the 1991–94 LEP runs, is described. No signal was found. Upper limits at 95% confidence level for the respective branching fractions of 1.2 × 10−5, 2.2 × 10−5, and 0.25 × 10−5, were obtained.

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References

  1. M. J. S. Levine, Phys. Rev. D36 (1987) 1329.

    ADS  Google Scholar 

  2. A. Méndez and Ll. M. Mir, Phys. Rev. D40 (1989) 251.

    ADS  Google Scholar 

  3. T. K. Kuo and N. Nakagawa, Phys. Rev. D32 (1985) 306.

    ADS  Google Scholar 

  4. J. Bernabéu et al., Phys. Lett. B187 (1987) 303.

    Article  ADS  Google Scholar 

  5. G. Eilam and T. G. Rizzo, Phys. Lett. B188 (1987) 91.

    Article  ADS  Google Scholar 

  6. J. Bernabéu and A. Santamaría, Phys. Lett. B197 (1987) 418.

    Article  ADS  Google Scholar 

  7. A. Ilakovac and A. Pilaftsis, Nucl. Phys. B437 (1995) 491.

    Article  ADS  Google Scholar 

  8. M. Dittmar and J. W. F. Valle, Flavour-changing Z decays (leptonic), in CERN Yellow report CERN 91-02, 1991, p.98, ed. E. Blucher, J. Jowett, F. Merrit, G. Mikenberg, J. Panman, F. M. Renard and D. Treille.

  9. E. W. N. Glover and J. J. van der Bij, Rare Z Decays, in CERN Yellow report CERN 89-08 Vol.2, 1989, p1, ed. G. Altarelli, R. Kleiss and C. Verzegnassi.

  10. P. Depommier and C. Leroy, Rep. Prog. Phys. 58 (1995) 61.

    Article  ADS  Google Scholar 

  11. P. Abreu et al., DELPHI Coll., Phys. Lett. B298 (1993) 247.

    ADS  Google Scholar 

  12. R. Akers et al. OPAL Coll., Z. Phys. C67 (1995) 555.

    ADS  Google Scholar 

  13. O. Adriani et al. L3 Coll., Phys. Lett. B316 (1993) 427.

    Article  ADS  Google Scholar 

  14. D. Decamp et al. ALEPH Coll., Phys. Rep. 216 (1992) 253.

    Article  Google Scholar 

  15. P. Aarnio et al., DELPHI Coll., Nucl. Inst. Meth. A303 (1991) 233; P. Abreu et al., DELPHI Coll., Nucl. Inst. Meth. A378 (1996) 57.

    Google Scholar 

  16. F. A. Berends, W. Hollik and R. Kleiss, Nucl. Phys. B304 (1988) 712.

    Article  ADS  Google Scholar 

  17. J. E. Campagne and R. Zitoun, Z. Phys. C43 (1989) 469.

    ADS  Google Scholar 

  18. S. Jadach, B. F. L. Ward, and Z. Was, Comp. Phys. Comm. 66 (1991) 276.

    Article  ADS  MATH  Google Scholar 

  19. DELSIM: DELPHI Event Generation and Detector Simulation, Reference Manual, DELPHI 89-68 PROG 143, 1 September 1989, unpublished.

  20. Particle Data Group, Review of Particle Properties, Phys. Rev. D50 (1994), see p.1280.

    Google Scholar 

  21. R. D. Cousins and V. L. Highland, Nucl. Inst. Meth. A320 (1992) 331.

    Article  ADS  Google Scholar 

  22. P. Abreu et al., DELPHI Coll., Nucl. Phys. B417 (1994) 3.

    ADS  Google Scholar 

  23. V. Bocci et al., DELPHI trigger group, Nucl. Inst. Meth. A362 (1995) 361; P. Abreu et al., DELPHI Coll., Z. Phys. C67 (1995) 183.

    Article  ADS  Google Scholar 

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DELPHI Collaboration. Search for lepton flavour number violating Z0- decays. Z Phys C - Particles and Fields 73, 243–251 (1997). https://doi.org/10.1007/s002880050313

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  • DOI: https://doi.org/10.1007/s002880050313

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