Observation of the hindered electromagnetic Dalitz decay ψ(3686)→e+e−ηc

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Observation of the hindered electromagnetic Dalitz decay ψ(3686)→e+e−ηc. / BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

In: Physical Review D, Vol. 106, No. 11, 112002, 07.12.2022.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{d9e71720e8e9476a8b7f108bc4e4bca6,

title = "Observation of the hindered electromagnetic Dalitz decay ψ(3686)→e+e−ηc",

abstract = "Using a data sample of decays collected at an 푒+⁢푒− center-of-mass energy of 3.686 GeV by the BESIII detector at Beijing Electron Positron Collider II, we report an observation of the hindered electromagnetic Dalitz decay 휓⁡(3686)→푒+⁢푒−⁢휂푐 with a significance of 7.9⁢휎. The branching fraction is determined to be ℬ⁡(휓⁡(3686)→푒+⁢푒−⁢휂푐)=(3.77±0.4⁢0stat±0.1⁢8syst)×10−5, agreeing well with the prediction of the vector meson dominance model. This is the first measurement of the electromagnetic Dalitz transition between the 휓⁡(3686) and the 휂푐, which provides new insight into the electromagnetic properties of this decay, and offers new opportunities to measure the absolute branching fractions of 휂푐 decays.",

author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "Observation of the hindered electromagnetic Dalitz decay ψ(3686)→e+e−ηc / BESIII Collaboration// Physical Review D. – 2022. – Vol. 106, No. 11. – P. 112002. – DOI 10.1103/physrevd.106.112002. ",

year = "2022",

month = dec,

day = "7",

doi = "10.1103/PhysRevD.106.112002",

language = "English",

volume = "106",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "11",

}

RIS

TY - JOUR

T1 - Observation of the hindered electromagnetic Dalitz decay ψ(3686)→e+e−ηc

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Observation of the hindered electromagnetic Dalitz decay ψ(3686)→e+e−ηc / BESIII Collaboration// Physical Review D. – 2022. – Vol. 106, No. 11. – P. 112002. – DOI 10.1103/physrevd.106.112002.

PY - 2022/12/7

Y1 - 2022/12/7

N2 - Using a data sample of decays collected at an 푒+⁢푒− center-of-mass energy of 3.686 GeV by the BESIII detector at Beijing Electron Positron Collider II, we report an observation of the hindered electromagnetic Dalitz decay 휓⁡(3686)→푒+⁢푒−⁢휂푐 with a significance of 7.9⁢휎. The branching fraction is determined to be ℬ⁡(휓⁡(3686)→푒+⁢푒−⁢휂푐)=(3.77±0.4⁢0stat±0.1⁢8syst)×10−5, agreeing well with the prediction of the vector meson dominance model. This is the first measurement of the electromagnetic Dalitz transition between the 휓⁡(3686) and the 휂푐, which provides new insight into the electromagnetic properties of this decay, and offers new opportunities to measure the absolute branching fractions of 휂푐 decays.

AB - Using a data sample of decays collected at an 푒+⁢푒− center-of-mass energy of 3.686 GeV by the BESIII detector at Beijing Electron Positron Collider II, we report an observation of the hindered electromagnetic Dalitz decay 휓⁡(3686)→푒+⁢푒−⁢휂푐 with a significance of 7.9⁢휎. The branching fraction is determined to be ℬ⁡(휓⁡(3686)→푒+⁢푒−⁢휂푐)=(3.77±0.4⁢0stat±0.1⁢8syst)×10−5, agreeing well with the prediction of the vector meson dominance model. This is the first measurement of the electromagnetic Dalitz transition between the 휓⁡(3686) and the 휂푐, which provides new insight into the electromagnetic properties of this decay, and offers new opportunities to measure the absolute branching fractions of 휂푐 decays.

UR - https://www.elibrary.ru/item.asp?id=58957710

U2 - 10.1103/PhysRevD.106.112002

DO - 10.1103/PhysRevD.106.112002

M3 - Article

VL - 106

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 112002

ER -

ID: 68341870