Measurement of C P  Violation in the Decay B + → K + π 0

K. De Bruyn; C. J. G. Onderwater; M. van Veghel; LHCb Collaboration

doi:10.1103/PhysRevLett.126.091802

Measurement of C P Violation in the Decay B + → K + π 0

K. De Bruyn, C. J. G. Onderwater, M. van Veghel, LHCb Collaboration

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Abstract

A measurement of CP violation in the decay B+→K+π0 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 √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 B0→K+π− and B+→K+π0 decays, known as the Kπ puzzle.

Original language	English
Article number	091802
Number of pages	11
Journal	Physical Review Letters
Volume	126
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.126.091802
Publication status	Published - 2-Mar-2021

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title = "Measurement of C P Violation in the Decay B + → K + π 0",

abstract = "A measurement of CP violation in the decay B+→K+π0 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 √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 B0→K+π− and B+→K+π0 decays, known as the Kπ puzzle.",

author = "R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and {De Bruyn}, K. and L. Dufour and M Mulder and Onderwater, {C. J. G.} and A. Pellegrino and S. Tolk and {van Veghel}, M. and {LHCb Collaboration}",

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doi = "10.1103/PhysRevLett.126.091802",

language = "English",

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T1 - Measurement of C P Violation in the Decay B + → K + π 0

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - De Bruyn, K.

AU - Dufour, L.

AU - Mulder, M

AU - Onderwater, C. J. G.

AU - Pellegrino, A.

AU - Tolk, S.

AU - van Veghel, M.

AU - LHCb Collaboration

PY - 2021/3/2

Y1 - 2021/3/2

N2 - A measurement of CP violation in the decay B+→K+π0 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 √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 B0→K+π− and B+→K+π0 decays, known as the Kπ puzzle.

AB - A measurement of CP violation in the decay B+→K+π0 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 √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 B0→K+π− and B+→K+π0 decays, known as the Kπ puzzle.

U2 - 10.1103/PhysRevLett.126.091802

DO - 10.1103/PhysRevLett.126.091802

M3 - Article

C2 - 33750182

SN - 0031-9007

VL - 126

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 091802

ER -

Measurement of C P Violation in the Decay B + → K + π 0

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