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Study of the Dalitz decay J /ψ →e+e-η. / The BELLE collaboration.

In: Physical Review D, Vol. 99, No. 1, 012006, 09.01.2019.

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

Harvard

The BELLE collaboration 2019, 'Study of the Dalitz decay J /ψ →e+e-η', Physical Review D, vol. 99, no. 1, 012006. https://doi.org/10.1103/PhysRevD.99.012006

APA

The BELLE collaboration (2019). Study of the Dalitz decay J /ψ →e+e-η. Physical Review D, 99(1), [012006]. https://doi.org/10.1103/PhysRevD.99.012006

Vancouver

The BELLE collaboration. Study of the Dalitz decay J /ψ →e+e-η. Physical Review D. 2019 Jan 9;99(1):012006. doi: 10.1103/PhysRevD.99.012006

Author

The BELLE collaboration. / Study of the Dalitz decay J /ψ →e+e-η. In: Physical Review D. 2019 ; Vol. 99, No. 1.

BibTeX

@article{8291136c01bf41c0a856d4d664bf5fa4,
title = "Study of the Dalitz decay J /ψ →e+e-η",
abstract = "We study the electromagnetic Dalitz decay J/ψ→e+e-η and search for dielectron decays of a dark gauge boson (γ′) in J/ψ→γ′η with the two η decay modes η→γγ and η→π+π-π0 using (1310.6±7.0)×106 J/ψ events collected with the BESIII detector. The branching fraction of J/ψ→e+e-η is measured to be (1.43±0.04(stat)±0.06(syst))×10-5, with a precision that is improved by a factor of 1.5 over the previous BESIII measurement. The corresponding dielectron invariant mass dependent modulus square of the transition form factor is explored for the first time, and the pole mass is determined to be Λ=2.84±0.11(stat)±0.08(syst) GeV/c2. We find no evidence of γ′ production and set 90% confidence level upper limits on the product branching fraction B(J/ψ→γ′η)×B(γ′→e+e-) as well as the kinetic mixing strength between the standard model photon and γ′ in the mass range of 0.01≤mγ′≤2.4 GeV/c2.",
keywords = "DARK PHOTON, ETA-E(+)E(-), EMISSION, SEARCH, MESON, OMEGA, PAIR, PHI, ETA",
author = "{The BELLE collaboration} and M. Ablikim and Achasov, {M. N.} and S. Ahmed and M. Albrecht and M. Alekseev and A. Amoroso and An, {F. F.} and Q. An and Y. Bai and O. Bakina and {Baldini Ferroli}, R. and Y. Ban and K. Begzsuren and Bennett, {D. W.} and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and E. Boger and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and Chang, {W. L.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and Chen, {P. L.} and Chen, {S. J.} and Chen, {X. R.} and Chen, {Y. B.} and Chu, {X. K.} and G. Cibinetto and F. Cossio and Dai, {H. L.} and Dai, {J. P.} and A. Dbeyssi and D. Dedovich and Deng, {Z. Y.} and A. Denig and Muchnoi, {N. Yu}",
note = "Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP . ",
year = "2019",
month = jan,
day = "9",
doi = "10.1103/PhysRevD.99.012006",
language = "English",
volume = "99",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "AMER PHYSICAL SOC",
number = "1",

}

RIS

TY - JOUR

T1 - Study of the Dalitz decay J /ψ →e+e-η

AU - The BELLE collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Alekseev, M.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Begzsuren, K.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

AU - Chang, J. F.

AU - Chang, W. L.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, P. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Cossio, F.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Muchnoi, N. Yu

N1 - Publisher Copyright: © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP .

PY - 2019/1/9

Y1 - 2019/1/9

N2 - We study the electromagnetic Dalitz decay J/ψ→e+e-η and search for dielectron decays of a dark gauge boson (γ′) in J/ψ→γ′η with the two η decay modes η→γγ and η→π+π-π0 using (1310.6±7.0)×106 J/ψ events collected with the BESIII detector. The branching fraction of J/ψ→e+e-η is measured to be (1.43±0.04(stat)±0.06(syst))×10-5, with a precision that is improved by a factor of 1.5 over the previous BESIII measurement. The corresponding dielectron invariant mass dependent modulus square of the transition form factor is explored for the first time, and the pole mass is determined to be Λ=2.84±0.11(stat)±0.08(syst) GeV/c2. We find no evidence of γ′ production and set 90% confidence level upper limits on the product branching fraction B(J/ψ→γ′η)×B(γ′→e+e-) as well as the kinetic mixing strength between the standard model photon and γ′ in the mass range of 0.01≤mγ′≤2.4 GeV/c2.

AB - We study the electromagnetic Dalitz decay J/ψ→e+e-η and search for dielectron decays of a dark gauge boson (γ′) in J/ψ→γ′η with the two η decay modes η→γγ and η→π+π-π0 using (1310.6±7.0)×106 J/ψ events collected with the BESIII detector. The branching fraction of J/ψ→e+e-η is measured to be (1.43±0.04(stat)±0.06(syst))×10-5, with a precision that is improved by a factor of 1.5 over the previous BESIII measurement. The corresponding dielectron invariant mass dependent modulus square of the transition form factor is explored for the first time, and the pole mass is determined to be Λ=2.84±0.11(stat)±0.08(syst) GeV/c2. We find no evidence of γ′ production and set 90% confidence level upper limits on the product branching fraction B(J/ψ→γ′η)×B(γ′→e+e-) as well as the kinetic mixing strength between the standard model photon and γ′ in the mass range of 0.01≤mγ′≤2.4 GeV/c2.

KW - DARK PHOTON

KW - ETA-E(+)E(-)

KW - EMISSION

KW - SEARCH

KW - MESON

KW - OMEGA

KW - PAIR

KW - PHI

KW - ETA

UR - http://www.scopus.com/inward/record.url?scp=85061076803&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.99.012006

DO - 10.1103/PhysRevD.99.012006

M3 - Article

AN - SCOPUS:85061076803

VL - 99

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 1

M1 - 012006

ER -

ID: 18466942