2026-04-17T22:52:20Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/993032025-12-05T16:39:49Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Abellan Beteta, Carlos author Camboni, Alessandro author Comerma Montells, Albert author Garrido Beltrán, Lluís author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author López Asamar, Elias author Picatoste Olloqui, Eduardo author Potterat, Cédric author Rives Molina, Vicente José author Ruiz, Hugo (Ruiz Pérez) author Vázquez Gómez, Ricard author Calvo Gómez, Míriam author Oyanguren Campos, Arantza de author Pérez-Calero Yzquierdo, Antonio author Ruiz Valls, Pablo author Vilasis-Cardona, Xavier author LHCb Collaboration author 2016-06-07T10:05:57Z 2016-06-07T10:05:57Z 2013-05-29 2016-06-07T10:06:02Z The branching fraction of the rare decay B0→ K∗0 e +e− in the dilepton mass region from 30 to 1000 MeV/c2 has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, at a centre-of-mass energy of 7 TeV. The decay mode B0 → J/ψ(e+e−)K∗0 is utilized as a normalization channel. The branching fraction B(B0 → K∗0e+e−) is measured to beB(B 0→ K∗0 e+e−)30−1000 MeV/c2= (3.1+0.9 +0.2−0.8 −0.3 ± 0.2) × 10−7 , where the first error is statistical, the second is systematic, and the third comes from the uncertainties on the B0→ J/ψ K∗0 and J/ψ → e+e− branching fractions. Hadrons Cromodinàmica quàntica Gran Col·lisionador d'Hadrons Hadrons Quantum chromodynamics Large Hadron Collider (France and Switzerland) Measurement of the B 0 → K ∗0 e + e - branching fraction at low dilepton mass