A search for the lepton-flavour violating decay D0 → e± μ∓ is made with a dataset corresponding to an integrated luminosity of 3.0 fb^−1 of proton–proton collisions at centre-of-mass energies of 7 TeV and 8 TeV, collected by the LHCb experiment. Candidate D0 mesons are selected using the decay D⁎+ → D0 π+ 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.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2016). Search for the Lepton-Flavour Violating Decay D0 → e± μ∓. PHYSICS LETTERS. SECTION B, 754, 167-175 [10.1016/j.physletb.2016.01.029].

Search for the Lepton-Flavour Violating Decay D0 → e± μ∓

Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;ZUCCHELLI, STEFANO
2016

Abstract

A search for the lepton-flavour violating decay D0 → e± μ∓ is made with a dataset corresponding to an integrated luminosity of 3.0 fb^−1 of proton–proton collisions at centre-of-mass energies of 7 TeV and 8 TeV, collected by the LHCb experiment. Candidate D0 mesons are selected using the decay D⁎+ → D0 π+ 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.
2016
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2016). Search for the Lepton-Flavour Violating Decay D0 → e± μ∓. PHYSICS LETTERS. SECTION B, 754, 167-175 [10.1016/j.physletb.2016.01.029].
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Car...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/532802
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