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Search for the lepton-flavour violating decay D0→e±μ∓
- Collaboration, LHCb;
- Aaij, R;
- Beteta, C Abellán;
- Adeva, B;
- Adinolfi, M;
- Affolder, A;
- Ajaltouni, Z;
- Akar, S;
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Published Web Location
https://doi.org/10.1016/j.physletb.2016.01.029Abstract
A search for the lepton-flavour violating decay D0→e±μ∓ is made with a dataset corresponding to an integrated luminosity of 3.0fb−1 of proton–proton collisions at centre-of-mass energies of 7TeV and 8TeV, collected by the LHCb experiment. Candidate D0 mesons are selected using the decay D⁎+→D0π+ and the D0→e±μ∓ branching fraction is measured using the decay mode D0→K−π+ as a normalization channel. No significant excess of D0→e±μ∓ candidates over the expected background is seen, and a limit is set on the branching fraction, B(D0→e±μ∓)<1.3×10−8, at 90% confidence level. This is an order of magnitude lower than the previous limit and it further constrains the parameter space in some leptoquark models and in supersymmetric models with R-parity violation.
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