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|a Aaij, R.
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|a Abellán Beteta, C.
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|a Ackernley, T.
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|a Adeva, B.
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|a Adinolfi, M.
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|a Afsharnia, H.
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|a Aidala, C. A.
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|a Aiola, S.
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|a Ajaltouni, Z.
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|a Akar, S.
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|a Albrecht, J.
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|a Alessio, F.
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|a Alexander, M.
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|a Alfonso Albero, A.
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|a Aliouche, Z.
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|a Searches for 25 rare and forbidden decays of D+ and D s + $$ {D}_s^{+} $$ mesons
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|b Springer Berlin Heidelberg,
|c 2021-11-01T14:33:46Z.
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|z Get fulltext
|u https://hdl.handle.net/1721.1/136848
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|a Abstract A search is performed for rare and forbidden charm decays of the form D s + → h ± ℓ + ℓ ' ∓ $$ {D}_{(s)}^{+}\to {h}^{\pm }{\mathrm{\ell}}^{+}{\mathrm{\ell}}^{\left(\prime \right)\mp } $$ , where h± is a pion or kaon and ℓ(')± is an electron or muon. The measurements are performed using proton-proton collision data, corresponding to an integrated luminosity of 1.6 fb−1, collected by the LHCb experiment in 2016. No evidence is observed for the 25 decay modes that are investigated and 90 % confidence level limits on the branching fractions are set between 1.4 × 10−8 and 6.4 × 10−6. In most cases, these results represent an improvement on existing limits by one to two orders of magnitude.
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