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Search for direct CP violation in charged charmless B → PV decays

Measurements of 𝐶⁢𝑃 asymmetry in charmless 𝐵→𝑃⁢𝑉 decays are presented, where 𝑃 and 𝑉 denote a pseudoscalar and a vector meson, respectively. Five different 𝐵→𝑃⁢𝑉 decays from four final states, 𝐵±→𝜋±⁢𝜋+⁢𝜋−, 𝐵±→𝐾±⁢𝜋+⁢𝜋−, 𝐵±→𝐾±⁢𝐾+⁢𝐾− and 𝐵±→𝜋±⁢𝐾+⁢𝐾− are analyzed. The measurements are based on a method...

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Auteurs principaux: Aaij, Roel (Auteur) , Archilli, Flavio (Auteur) , Bachmann, Sebastian (Auteur) , Berninghoff, Daniel (Auteur) , Borsato, Martino (Auteur) , Caspary, Rowina (Auteur) , Frau, Giulia (Auteur) , Grabowski, Jascha (Auteur) , Günther, Paul André (Auteur) , Han, Xiaoxue (Auteur) , Hansmann-Menzemer, Stephanie (Auteur) , Hu, Jiangqiao (Auteur) , Kopecná, Renata (Auteur) , Leverington, Blake (Auteur) , Li, Peilian (Auteur) , Marks, Jörg (Auteur) , Unverzagt, Daniel Joachim (Auteur) , Uwer, Ulrich (Auteur) , Wang, Chishuai (Auteur) , Witola, Lukas (Auteur) , Zhelezov, Alexey (Auteur)
Collectivité auteur: LHCb Collaboration (Auteur)
Format: Article (Journal)
Langue:anglais
Publié: 20 July 2023
In: Physical review
Year: 2023, Volume: 108, Numéro: 1, Pages: 1-13
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.012013
Accès en ligne:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.108.012013
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.012013
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Notes sur l'auteur:R. Aaij et al. (LHCb Collaboration)
Description
Résumé:Measurements of 𝐶⁢𝑃 asymmetry in charmless 𝐵→𝑃⁢𝑉 decays are presented, where 𝑃 and 𝑉 denote a pseudoscalar and a vector meson, respectively. Five different 𝐵→𝑃⁢𝑉 decays from four final states, 𝐵±→𝜋±⁢𝜋+⁢𝜋−, 𝐵±→𝐾±⁢𝜋+⁢𝜋−, 𝐵±→𝐾±⁢𝐾+⁢𝐾− and 𝐵±→𝜋±⁢𝐾+⁢𝐾− are analyzed. The measurements are based on a method that does not require full amplitude analyses, and are performed using proton-proton collision data at a center-of-mass energy of 13 TeV collected by LHCb between 2015 and 2018, corresponding to an integrated luminosity of 5.9 fb−1. In the 𝜋+⁢𝜋− 𝑃-wave, in the region dominated by the 𝐵±→𝜌⁢(770)0⁢𝐾± decay, a 𝐶⁢𝑃 asymmetry of 𝐴𝐶⁢𝑃=+0.150±0.019±0.011 is measured, where the first uncertainty is statistical and the second is systematic. This is the first observation of 𝐶⁢𝑃 violation in this process. For the other four decay channels, in regions dominated by the 𝐵±→𝜌⁢(770)0⁢𝜋±, 𝐵±→(¯ )𝐾⁢ *⁢(892)0⁢𝜋±, 𝐵±→(¯ )𝐾⁢ *⁢(892)0⁢𝐾± and 𝐵±→𝜙⁡(1020)⁢𝐾± decays, 𝐶⁢𝑃 asymmetries in the 𝑃-wave compatible with zero are measured.
Description:Gesehen am 12.07.2024
LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, R. Caspary, G. Frau, J.P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, J. Marks, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und viele weitere]
Description matérielle:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.012013

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