A search for the rare radiative leptonic decay Dþs → γeþνe is performed for the first time using electron- positron collision data corresponding to an integrated luminosity of 3.19 fb−1, collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. No evidence for the Dþs → γeþνe decay is seen, and an upper limit of BðDþs → γeþνeÞ < 1.3 × 10−4 is set on the partial branching fraction at a 90% confidence level for radiative photon energies E0γ > 0.01 GeV.

Search for the decay Ds+→γe+νe

Cibinetto, G.;Farinelli, R.;Garzia, I.;Mezzadri, G.;Savrié, M.;
2019

Abstract

A search for the rare radiative leptonic decay Dþs → γeþνe is performed for the first time using electron- positron collision data corresponding to an integrated luminosity of 3.19 fb−1, collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. No evidence for the Dþs → γeþνe decay is seen, and an upper limit of BðDþs → γeþνeÞ < 1.3 × 10−4 is set on the partial branching fraction at a 90% confidence level for radiative photon energies E0γ > 0.01 GeV.
2019
Ablikim, M.; Achasov, M.  N.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F.  F.; An, Q.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Ban, Y...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2403869
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