Measurement of <i>CP</i> Violation in the Decay <i>B</i> plus → <i>K</i><SUP>+</SUP> π<SUP>0</SUP>

Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 960 more authors) (2021) Measurement of <i>CP</i> Violation in the Decay <i>B</i> plus → <i>K</i><SUP>+</SUP> π<SUP>0</SUP>. PHYSICAL REVIEW LETTERS, 126 (9). 091802-.

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A measurement of CP violation in the decay B^{+}→K^{+}π^{0} is reported using data corresponding to an integrated luminosity of 5.4  fb^{-1} collected with the LHCb experiment at a center-of-mass energy of sqrt[s]=13  TeV. The CP asymmetry is measured to be 0.025±0.015±0.006±0.003, where the uncertainties are statistical, systematic, and due to an external input. This is the most precise measurement of this quantity. It confirms and significantly enhances the observed anomalous difference between the direct CP asymmetries of the B^{0}→K^{+}π^{-} and B^{+}→K^{+}π^{0} decays, known as the Kπ puzzle.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at (LHCb public pages)
Uncontrolled Keywords: LHCb Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 21 Apr 2021 10:19
Last Modified: 16 Oct 2023 18:00
DOI: 10.1103/PhysRevLett.126.091802
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