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Title: Measurement of the B 0 → K ∗0 e + e - branching fraction at low dilepton mass
Author: Abellan Beteta, Carlos
Camboni, Alessandro
Comerma Montells, Albert
Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Picatoste Olloqui, Eduardo
Potterat, Cédric
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Calvo Gómez, Míriam
Oyanguren Campos, Arantza de
Pérez-Calero Yzquierdo, Antonio
Ruiz Valls, Pablo
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Hadrons
Cromodinàmica quàntica
Gran Col·lisionador d'Hadrons
Quantum chromodynamics
Large Hadron Collider (France and Switzerland)
Issue Date: 29-May-2013
Publisher: Springer Verlag
Abstract: 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.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2013, vol. 159, num. 159
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ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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