A search for the decays Bs0→e+e- and B0→e+e- is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 2 fb-1, respectively. No signal is observed. Assuming no contribution from B0→e+e- decays, an upper limit on the branching fraction B(Bs0→e+e-)<9.4(11.2)×10-9 is obtained at 90(95)% confidence level. If no Bs0→e+e- contribution is assumed, a limit of B(B0→e+e-)<2.5(3.0)×10-9 is determined at 90(95)% confidence level. These upper limits are more than one order of magnitude lower than the previous values.

Zucchelli, S., Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2020). Search for the Rare Decays Bs0 →e+e- And B0 →e+e. PHYSICAL REVIEW LETTERS, 124(21) [10.1103/PhysRevLett.124.211802].

Search for the Rare Decays Bs0 →e+e- And B0 →e+e

Borsato M.;Calvi M.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Kirsebom V. S.;Martinazzoli L.;Martinelli M.;Meloni S.;Petruzzo M.;
2020

Abstract

A search for the decays Bs0→e+e- and B0→e+e- is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 2 fb-1, respectively. No signal is observed. Assuming no contribution from B0→e+e- decays, an upper limit on the branching fraction B(Bs0→e+e-)<9.4(11.2)×10-9 is obtained at 90(95)% confidence level. If no Bs0→e+e- contribution is assumed, a limit of B(B0→e+e-)<2.5(3.0)×10-9 is determined at 90(95)% confidence level. These upper limits are more than one order of magnitude lower than the previous values.
Articolo in rivista - Articolo scientifico
lhcb
English
2020
124
21
211802
open
Zucchelli, S., Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2020). Search for the Rare Decays Bs0 →e+e- And B0 →e+e. PHYSICAL REVIEW LETTERS, 124(21) [10.1103/PhysRevLett.124.211802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/289386
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