2026-04-17T06:16:26Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1308452025-12-05T16:50:06Zcom_2072_1057col_2072_478823col_2072_478917
RECERCAT
author
Garra Ticó, Jordi
author
Graugés Pous, Eugeni
author
BABAR Collaboration
2019-03-25T12:33:24Z2019-03-25T12:33:24Z2012-08-242019-03-25T12:33:24Z
In a sample of 471 × 10 6 B ¯¯¯ B events collected with the BABAR detector at the PEP-II e + e − collider we study the rare decays B → K ( * ) ℓ + ℓ − , where ℓ + ℓ − is either e + e − or μ + μ − . We report results on partial branching fractions and isospin asymmetries in seven bins of dilepton mass-squared. We further present C P and lepton-flavor asymmetries for dilepton masses below and above the J / ψ resonance. We find no evidence for C P or lepton-flavor violation. The partial branching fractions and isospin asymmetries are consistent with the Standard Model predictions and with results from other experiments.
(c) American Physical Society, 2012 info:eu-repo/semantics/openAccess
Física de partícules
Experiments
Leptons (Física nuclear)
Particle physics
Experiments
Leptons (Nuclear physics)
Measurement of branching fractions and rate asymmetries in the rare decays B → K(*)ℓ+ℓ−
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion