Observation of the decay J/ψ →e+e-η (1405) with η (1405) →π0f0 (980)

Standard

Observation of the decay J/ψ →e+e-η (1405) with η (1405) →π0f0 (980). / BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

In: Physical Review D, Vol. 109, No. 1, 012007, 12.01.2024.

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

BibTeX

@article{42cceb4a725c43a09b06a1bda638d55c,

title = "Observation of the decay J/ψ →e+e-η (1405) with η (1405) →π0f0 (980)",

abstract = "Using a data sample of (10087±44)×106 J/ψ events collected by the BESIII detector in 2009, 2012, 2018 and 2019, the electromagnetic Dalitz process J/ψ→e+e-η(1405) is observed via the decay η(1405)→π0f0(980), f0(980)→π+π-, with a significance of about 9.8σ. The branching fraction of this decay is measured to be B(J/ψ→e+e-η(1405)→e+e-π0f0(980)→e+e-π0π+π-)=(2.04±0.20(stat)±0.08(syst))×10-7. The branching fraction ratio B(J/ψ→e+e-η(1405))/B(J/ψ→γη(1405)) is determined to be (1.36±0.17(stat)±0.06(syst))×10-2. Furthermore, an e+e- invariant mass dependent transition form factor of J/ψ→e+e-η(1405) is presented for the first time. The obtained result provides input for different theoretical models and is valuable for the improved understanding the intrinsic structure of the η(1405) meson.",

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

year = "2024",

month = jan,

day = "12",

doi = "10.1103/PhysRevD.109.012007",

language = "English",

volume = "109",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "1",

}

RIS

TY - JOUR

T1 - Observation of the decay J/ψ →e+e-η (1405) with η (1405) →π0f0 (980)

AU - BESIII Collaboration

AU - Achasov, M. N.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

PY - 2024/1/12

Y1 - 2024/1/12

N2 - Using a data sample of (10087±44)×106 J/ψ events collected by the BESIII detector in 2009, 2012, 2018 and 2019, the electromagnetic Dalitz process J/ψ→e+e-η(1405) is observed via the decay η(1405)→π0f0(980), f0(980)→π+π-, with a significance of about 9.8σ. The branching fraction of this decay is measured to be B(J/ψ→e+e-η(1405)→e+e-π0f0(980)→e+e-π0π+π-)=(2.04±0.20(stat)±0.08(syst))×10-7. The branching fraction ratio B(J/ψ→e+e-η(1405))/B(J/ψ→γη(1405)) is determined to be (1.36±0.17(stat)±0.06(syst))×10-2. Furthermore, an e+e- invariant mass dependent transition form factor of J/ψ→e+e-η(1405) is presented for the first time. The obtained result provides input for different theoretical models and is valuable for the improved understanding the intrinsic structure of the η(1405) meson.

AB - Using a data sample of (10087±44)×106 J/ψ events collected by the BESIII detector in 2009, 2012, 2018 and 2019, the electromagnetic Dalitz process J/ψ→e+e-η(1405) is observed via the decay η(1405)→π0f0(980), f0(980)→π+π-, with a significance of about 9.8σ. The branching fraction of this decay is measured to be B(J/ψ→e+e-η(1405)→e+e-π0f0(980)→e+e-π0π+π-)=(2.04±0.20(stat)±0.08(syst))×10-7. The branching fraction ratio B(J/ψ→e+e-η(1405))/B(J/ψ→γη(1405)) is determined to be (1.36±0.17(stat)±0.06(syst))×10-2. Furthermore, an e+e- invariant mass dependent transition form factor of J/ψ→e+e-η(1405) is presented for the first time. The obtained result provides input for different theoretical models and is valuable for the improved understanding the intrinsic structure of the η(1405) meson.

UR - https://www.mendeley.com/catalogue/a33d371b-7316-3dd1-9605-7da72c1c8228/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85182556273&origin=inward&txGid=a3f4beb2ece6da2f3afa97b355464d13

U2 - 10.1103/PhysRevD.109.012007

DO - 10.1103/PhysRevD.109.012007

M3 - Article

VL - 109

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 1

M1 - 012007

ER -

ID: 62699903