Journal of High Energy Physics

, 2012:92

LHC sensitivity to lepton flavour violating Z boson decays

Open Access

DOI: 10.1007/JHEP09(2012)092

Cite this article as:
Davidson, S., Lacroix, S. & Verdier, P. J. High Energ. Phys. (2012) 2012: 92. doi:10.1007/JHEP09(2012)092


We estimate that the LHC could set bounds BR(Zμ±e) < 4.1 × 10−7 and BR(Zτ±μ) < 3.5 × 10−6 (at 95% C.L.) with 20 fb−1 of data at 8 TeV. A similar sensitivity can be anticipated for Zτ±e, because we consider leptonic τ decays such that Zτ±μe±μ + invisible. These limits can be compared to the LEP1 bounds of order 10−5 → 10−6. Such collider searches are sensitive to a flavour-changing effective Z coupling which is energy dependent, so are complementary to bounds obtained from \( \tau \to \ell \overline \ell \ell \) and \( \mu \to e\overline e e \).


Rare Decays Beyond Standard Model Phenomenological Models 
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Copyright information

© SISSA 2012

Authors and Affiliations

  • Sacha Davidson
    • 1
  • Sylvain Lacroix
    • 1
  • Patrice Verdier
    • 1
  1. 1.IPNL, Université de Lyon, Université Lyon 1, CNRS/IN2P3Villeurbanne cedexFrance

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