Measurement of C P  asymmetry in D 0 → K 0 S K 0 S  decays

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

doi:10.1103/PhysRevD.104.L031102

Measurement of C P asymmetry in D 0 → K 0 S K 0 S decays

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

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Abstract

A measurement of the CP asymmetry in D0→K0SK0S decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The flavor of the D0 candidate is determined using the charge of the D*± meson, from which the decay is required to originate. The D0→K+K− decay is used as a calibration channel. The time-integrated CP asymmetry for the D0→K0SK0S mode is measured to be ACP(D0→K0SK0S)=(−3.1±1.2±0.4±0.2), where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the CP asymmetry of the calibration channel. This is the most precise determination of this quantity to date.

Original language	English
Article number	L031102
Number of pages	11
Journal	Physical Review D
Volume	104
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.104.L031102
Publication status	Published - 27-Aug-2021

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Measurement of C P asymmetry in D 0 → K 0 S K 0 S decaysFinal publisher's version, 362 KBLicence: CC BY

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@article{58885f4ebbd64ca6b34f6cd3d058bcc8,

title = "Measurement of C P asymmetry in D 0 → K 0 S K 0 S decays",

abstract = "A measurement of the CP asymmetry in D0→K0SK0S decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The flavor of the D0 candidate is determined using the charge of the D*± meson, from which the decay is required to originate. The D0→K+K− decay is used as a calibration channel. The time-integrated CP asymmetry for the D0→K0SK0S mode is measured to be ACP(D0→K0SK0S)=(−3.1±1.2±0.4±0.2), where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the CP asymmetry of the calibration channel. This is the most precise determination of this quantity to date.",

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

year = "2021",

month = aug,

day = "27",

doi = "10.1103/PhysRevD.104.L031102",

language = "English",

volume = "104",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

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TY - JOUR

T1 - Measurement of C P asymmetry in D 0 → K 0 S K 0 S decays

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Dufour, L.

AU - Mulder, Mick

AU - De Bruyn, K.

AU - Onderwater, C. J. G.

AU - Pellegrino, A.

AU - Tolk, S.

AU - van Veghel, M.

AU - LHCb Collaboration

PY - 2021/8/27

Y1 - 2021/8/27

N2 - A measurement of the CP asymmetry in D0→K0SK0S decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The flavor of the D0 candidate is determined using the charge of the D*± meson, from which the decay is required to originate. The D0→K+K− decay is used as a calibration channel. The time-integrated CP asymmetry for the D0→K0SK0S mode is measured to be ACP(D0→K0SK0S)=(−3.1±1.2±0.4±0.2), where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the CP asymmetry of the calibration channel. This is the most precise determination of this quantity to date.

AB - A measurement of the CP asymmetry in D0→K0SK0S decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 2018, corresponding to an integrated luminosity of 6 fb−1. The flavor of the D0 candidate is determined using the charge of the D*± meson, from which the decay is required to originate. The D0→K+K− decay is used as a calibration channel. The time-integrated CP asymmetry for the D0→K0SK0S mode is measured to be ACP(D0→K0SK0S)=(−3.1±1.2±0.4±0.2), where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the CP asymmetry of the calibration channel. This is the most precise determination of this quantity to date.

U2 - 10.1103/PhysRevD.104.L031102

DO - 10.1103/PhysRevD.104.L031102

M3 - Article

SN - 2470-0010

VL - 104

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - L031102

ER -

Measurement of C P asymmetry in D 0 → K 0 S K 0 S decays

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