Measurement of the CKM angle γ using B ± → DK ± with D → K0S π + π −, K0S K + K − decays
Title: | Measurement of the CKM angle γ using B ± → DK ± with D → K0S π + π −, K0S K + K − decays
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Author: | LHCb Collaboration
Adeva Andany, Bernardo
Álvarez Cartelle, Paula
Fernández Albor, Víctor Manuel
Gallas Torreira, Abraham Antonio
García Pardiñas, Julián
Hernando Morata, José Ángel
Pazos Álvarez, Antonio
Pérez Trigo, Eliseo
Plo Casasus, Máximo
Romero Vidal, Antonio
Saborido Silva, Juan José
Sanmartín Sedes, Brais
Santamarina Ríos, Cibrán
Seco Miguélez, Marcos Antonio
Vázquez Regueiro, Pablo
Vázquez Sierra, Carlos
Vieites Díaz, María
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Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE)
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Subject: | CP violation | CKM angle gamma | Hadron-Hadron Scattering | B physics | Flavor physics | |
Date of Issue: | 2014
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Publisher: | Springer
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Citation: | Aaij, R., Adeva, B., Adinolfi, M. et al. Measurement of the CKM angle γ using B ± → DK ± with D → K0S π + π −, K0S K + K − decays. J. High Energ. Phys. 2014, 97 (2014). https://doi.org/10.1007/JHEP10(2014)097
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Abstract: | A binned Dalitz plot analysis of B± → DK± decays, with D → K0S
+ −
and D → K0S
K+K−, is performed to measure the CP-violating observables x± and y±,
which are sensitive to the Cabibbo-Kobayashi-Maskawa angle
. The analysis exploits a
sample of proton-proton collision data corresponding to 3.0 fb−1 collected by the LHCb
experiment. Measurements from CLEO-c of the variation of the strong-interaction phase
of the D decay over the Dalitz plot are used as inputs. The values of the parameters are
found to be x+ = (−7.7 ± 2.4 ± 1.0 ± 0.4) × 10−2, x− = (2.5 ± 2.5 ± 1.0 ± 0.5) × 10−2,
y+ = (−2.2 ± 2.5 ± 0.4 ± 1.0) × 10−2, and y− = (7.5 ± 2.9 ± 0.5 ± 1.4) × 10−2. The first,
second, and third uncertainties are the statistical, the experimental systematic, and that
associated with the precision of the strong-phase parameters. These are the most precise
measurements of these observables and correspond to
= (62 +15
−14) , with a second solution
at
γ → γ
+ 180 , and rB = 0.080+0.019
−0.021, where rB is the ratio between the suppressed and
favoured B decay amplitudes |
Publisher version: | https://doi.org/10.1007/JHEP10(2014)097 |
URI: | http://hdl.handle.net/10347/22070
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DOI: | 10.1007/JHEP10(2014)097 |
ISSN: | 1029-8479
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Rights: | © CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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