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Title: Measurement of the CP Asymmetry in B+→K+μ+μ− Decays
Author: Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Oyanguren Campos, Arantza de
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Potterat, Cédric
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Ruiz Valls, Pablo
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 7-Oct-2013
Publisher: American Physical Society
Abstract: A measurement of the C P asymmetry in B + → K + μ + μ − decays is presented using p p collision data, corresponding to an integrated luminosity of 1.0     fb − 1 , recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of μ + μ − invariant mass squared in the range 0.05 < q 2 < 22.00     GeV 2 / c 4 , excluding the J / ψ and ψ ( 2 S ) resonance regions. Production and detection asymmetries are corrected for using the B + → J / ψ K + decay as a control mode. Averaged over all the bins, the C P asymmetry is found to be A C P = 0.000 ± 0.033   ( stat ) ± 0.005   ( syst ) ± 0.007 ( J / ψ K ), where the third uncertainty is due to the C P asymmetry of the control mode. This is consistent with the standard model prediction.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2013, vol. 111, num. 15, p. 151801
Related resource:
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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