A 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.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Search for the Rare Decays B0s → e+ e− and B0 → e+ e−. PHYSICAL REVIEW LETTERS, 124(21), 1-11 [10.1103/PhysRevLett.124.211802].

Search for the Rare Decays B0s → e+ e− and B0 → e+ e−

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Zucchelli, S.
2020

Abstract

A 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.
2020
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Search for the Rare Decays B0s → e+ e− and B0 → e+ e−. PHYSICAL REVIEW LETTERS, 124(21), 1-11 [10.1103/PhysRevLett.124.211802].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/772379
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