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∗+ → 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.

Search for the lepton-flavour violating decay D0→e±μ∓ / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 754:(2016), pp. 167-175. [10.1016/j.physletb.2016.01.029]

Search for the lepton-flavour violating decay D0→e±μ∓

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
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∗+ → 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.
2016
Leptonic, semileptonic & radiative decays, Particle production, Bottom mesons
01 Pubblicazione su rivista::01a Articolo in rivista
Search for the lepton-flavour violating decay D0→e±μ∓ / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 754:(2016), pp. 167-175. [10.1016/j.physletb.2016.01.029]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074186
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