Search for the Rare Decays B-s(0) -> e(+) e(-) and B-0 -> e(+) e(-)

Alfonso Albero, AlejandroCalvo Gómez, MíriamCamboni, AlessandroCoquereau, SamuelGarrido Beltrán, LluísGascón Fora, DavidGironella Gironell, PereGraciani Díaz, RicardoGraugés Pous, EugeniGolobardes, ElisabetManera Escalero, R.Vázquez Gómez, RicardVilasis-Cardona, XavierLHCb Collaboration2021-03-162021-03-162020-05-270031-9007https://hdl.handle.net/2445/175172A search for the decays B0s→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(B0s→e+e−)<9.4(11.2)×10−9 is obtained at 90(95)% confidence level. If no B0s→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.11 p.application/pdfengcc-by (c) Aaij, R. et al., 2020http://creativecommons.org/licenses/by/3.0/es/Gran Col·lisionador d'HadronsProtonsLarge Hadron Collider (France and Switzerland)ProtonsSearch for the Rare Decays B-s(0) -> e(+) e(-) and B-0 -> e(+) e(-)info:eu-repo/semantics/article7062282021-03-16info:eu-repo/semantics/openAccess