Precision measurement of the branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓

BESIII Collaboration; N. Kalantar-Nayestanaki; M. Kavatsyuk; J. Messchendorp

doi:10.1103/PhysRevD.110.032006

Precision measurement of the branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓

BESIII Collaboration, N. Kalantar-Nayestanaki, M. Kavatsyuk, J. Messchendorp

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Abstract

Using a sample of 448.1×106 𝜓⁡(2⁢𝑆) events collected with the BESIII detector, we perform a study of the decay 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓. The branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− is determined to be ℬ𝐾+⁢𝐾−=(3.072±0.023⁢(stat)±0.050⁢(syst))×10−4, which is consistent with previous measurements but with significantly improved precision.

Original language	English
Article number	032006
Number of pages	11
Journal	Physical Review D
Volume	110
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.110.032006
Publication status	Published - 1-Aug-2024

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Precision measurement of the branching fraction of J/ψ →k+K- via ψ (2S) →π+π-J/ψFinal publisher's version, 1.53 MBLicence: CC BY

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@article{f514c059a6b64f388ae1836875c4bcce,

title = "Precision measurement of the branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓",

abstract = "Using a sample of 448.1×106 𝜓⁡(2⁢𝑆) events collected with the BESIII detector, we perform a study of the decay 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓. The branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− is determined to be ℬ𝐾+⁢𝐾−=(3.072±0.023⁢(stat)±0.050⁢(syst))×10−4, which is consistent with previous measurements but with significantly improved precision.",

author = "{BESIII Collaboration} and M. Ablikim and M.N. Achasov and P. Adlarson and Ai, {X. C.} and R. Aliberti and A. Amoroso and An, {M. R.} and Q. An and Y. Bai and O. Bakina and N. Kalantar-Nayestanaki and M. Kavatsyuk and J. Messchendorp",

year = "2024",

month = aug,

day = "1",

doi = "10.1103/PhysRevD.110.032006",

language = "English",

volume = "110",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "AMER PHYSICAL SOC",

number = "3",

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TY - JOUR

T1 - Precision measurement of the branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M.N.

AU - Adlarson, P.

AU - Ai, X. C.

AU - Aliberti, R.

AU - Amoroso, A.

AU - An, M. R.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Kalantar-Nayestanaki, N.

AU - Kavatsyuk, M.

AU - Messchendorp, J.

PY - 2024/8/1

Y1 - 2024/8/1

N2 - Using a sample of 448.1×106 𝜓⁡(2⁢𝑆) events collected with the BESIII detector, we perform a study of the decay 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓. The branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− is determined to be ℬ𝐾+⁢𝐾−=(3.072±0.023⁢(stat)±0.050⁢(syst))×10−4, which is consistent with previous measurements but with significantly improved precision.

AB - Using a sample of 448.1×106 𝜓⁡(2⁢𝑆) events collected with the BESIII detector, we perform a study of the decay 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓. The branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− is determined to be ℬ𝐾+⁢𝐾−=(3.072±0.023⁢(stat)±0.050⁢(syst))×10−4, which is consistent with previous measurements but with significantly improved precision.

U2 - 10.1103/PhysRevD.110.032006

DO - 10.1103/PhysRevD.110.032006

M3 - Article

SN - 1550-7998

VL - 110

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 032006

ER -

Precision measurement of the branching fraction of 𝐽/𝜓→𝐾+⁢𝐾− via 𝜓⁡(2⁢𝑆)→𝜋+⁢𝜋−⁢𝐽/𝜓

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