Measurement of the branching fraction of ψ(2S)→γπ0

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Measurement of the branching fraction of ψ(2S)→γπ0. / The BESIII Collaboration ; Николаев, Иван Борисович ; Ачасов, Михаил Николаевич и др.

в: Physical Review D, Том 110, № 5, 052011, 27.09.2024.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{883d208a82af40c1b31241762ae06b10,

title = "Measurement of the branching fraction of ψ(2S)→γπ0",

abstract = "Based on (2712.4±14.1)×106 ψ(2S) events, 7.9 fb-1 ψ(3773) data, and 0.8 fb-1 off-resonance data samples collected with the BESIII detector, we measure the branching fraction of ψ(2S)→γπ0 and e+e-→γπ0 form factor at momentum transfers Q2∼13 GeV2. The e+e-→γπ0 cross section is fitted with considering the interference between the ψ(2S) and continuum amplitudes and two solutions are found, B=3.74×10-7 with φ=3.93 rad and B=7.87×10-7 with φ=2.08 rad. Here, B is the branching fraction of ψ(2S)→γπ0 and φ is the relative phase angle between the ψ(2S) and continuum amplitudes. Due to insufficient off-resonance data, the branching fraction B(ψ(2S)→γπ0) is determined to be in the range [2.7,9.7]×10-7 within 1 standard deviation of the contour region. ",

author = "{BESIII Collaboration} and M. Ablikim and Николаев, {Иван Борисович} and Ачасов, {Михаил Николаевич} and Мучной, {Николай Юрьевич}",

year = "2024",

month = sep,

day = "27",

doi = "10.1103/PhysRevD.110.052011",

language = "English",

volume = "110",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "5",

}

RIS

TY - JOUR

T1 - Measurement of the branching fraction of ψ(2S)→γπ0

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Николаев, Иван Борисович

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

PY - 2024/9/27

Y1 - 2024/9/27

N2 - Based on (2712.4±14.1)×106 ψ(2S) events, 7.9 fb-1 ψ(3773) data, and 0.8 fb-1 off-resonance data samples collected with the BESIII detector, we measure the branching fraction of ψ(2S)→γπ0 and e+e-→γπ0 form factor at momentum transfers Q2∼13 GeV2. The e+e-→γπ0 cross section is fitted with considering the interference between the ψ(2S) and continuum amplitudes and two solutions are found, B=3.74×10-7 with φ=3.93 rad and B=7.87×10-7 with φ=2.08 rad. Here, B is the branching fraction of ψ(2S)→γπ0 and φ is the relative phase angle between the ψ(2S) and continuum amplitudes. Due to insufficient off-resonance data, the branching fraction B(ψ(2S)→γπ0) is determined to be in the range [2.7,9.7]×10-7 within 1 standard deviation of the contour region.

AB - Based on (2712.4±14.1)×106 ψ(2S) events, 7.9 fb-1 ψ(3773) data, and 0.8 fb-1 off-resonance data samples collected with the BESIII detector, we measure the branching fraction of ψ(2S)→γπ0 and e+e-→γπ0 form factor at momentum transfers Q2∼13 GeV2. The e+e-→γπ0 cross section is fitted with considering the interference between the ψ(2S) and continuum amplitudes and two solutions are found, B=3.74×10-7 with φ=3.93 rad and B=7.87×10-7 with φ=2.08 rad. Here, B is the branching fraction of ψ(2S)→γπ0 and φ is the relative phase angle between the ψ(2S) and continuum amplitudes. Due to insufficient off-resonance data, the branching fraction B(ψ(2S)→γπ0) is determined to be in the range [2.7,9.7]×10-7 within 1 standard deviation of the contour region.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85208487108&origin=inward&txGid=9c3aa7f872817825f81cf8276b2fc00b

U2 - 10.1103/PhysRevD.110.052011

DO - 10.1103/PhysRevD.110.052011

M3 - Article

VL - 110

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 5

M1 - 052011

ER -

ID: 62704134

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