Observation of electromagnetic Dalitz decays J/psi -> Pe(+)e(-)

M. Ablikim; M. N. Achasov; X. C. Ai; O. Albayrak; M. Albrecht; D. J. Ambrose; O. Bondarenko; Nasser Kalantar-Nayestanaki; M. Kavatsyuk; H. Loehner; J. G. Messchendorp; H. Moeini; BESIII Collaboration

doi:10.1103/PhysRevD.89.092008

Observation of electromagnetic Dalitz decays J/psi -> Pe(+)e(-)

M. Ablikim^*, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, O. Bondarenko, Nasser Kalantar-Nayestanaki, M. Kavatsyuk, H. Loehner, J. G. Messchendorp, H. Moeini, BESIII Collaboration

^*Corresponding author voor dit werk

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Based on a sample of (225.3 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, the electromagnetic Dalitz decays of J/psi -> Pe(+)e(-)(P = eta'/eta/pi(0)) are studied. By reconstructing the pseudoscalar mesons in various decay modes, the decays J/psi -> eta'e(+)e(-), J/psi -> eta e(+)e(-), and J/psi -> pi(0)e(+)e(-) are observed for the first time. The branching fractions are determined to be B(J/psi -> eta'e(+)e(-)) = (5.81 +/- 0.16 +/- 0.31) x 10(-5), B(J/psi -> eta e(+)e(-)) = (1.16 +/- 0.07 +/- 0.06) x 10(-5), and B(J/psi -> pi(0)e(+)e(-)) = (7.56 +/- 1.32 +/- 0.50) x 10(-7), where the first errors are statistical and the second ones systematic.

Originele taal-2	English
Artikelnummer	092008
Aantal pagina's	10
Tijdschrift	Physical Review D
Volume	89
Nummer van het tijdschrift	9
DOI's	https://doi.org/10.1103/PhysRevD.89.092008
Status	Published - 19-mei-2014

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Observation of electromagnetic Dalitz decays J / ψ → P e + e −Final publisher's version, 1,31 MBLicentie: Taverne

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@article{c53a039c05c3425193e6abd20edf138c,

title = "Observation of electromagnetic Dalitz decays J/psi -> Pe(+)e(-)",

abstract = "Based on a sample of (225.3 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, the electromagnetic Dalitz decays of J/psi -> Pe(+)e(-)(P = eta'/eta/pi(0)) are studied. By reconstructing the pseudoscalar mesons in various decay modes, the decays J/psi -> eta'e(+)e(-), J/psi -> eta e(+)e(-), and J/psi -> pi(0)e(+)e(-) are observed for the first time. The branching fractions are determined to be B(J/psi -> eta'e(+)e(-)) = (5.81 +/- 0.16 +/- 0.31) x 10(-5), B(J/psi -> eta e(+)e(-)) = (1.16 +/- 0.07 +/- 0.06) x 10(-5), and B(J/psi -> pi(0)e(+)e(-)) = (7.56 +/- 1.32 +/- 0.50) x 10(-7), where the first errors are statistical and the second ones systematic.",

keywords = "TRANSITION FORM-FACTORS, VECTOR-MESONS, OMEGA, DETECTOR, BESIII, CMD-2, PAIR, PHI",

author = "M. Ablikim and Achasov, {M. N.} and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and O. Bondarenko and Nasser Kalantar-Nayestanaki and M. Kavatsyuk and H. Loehner and Messchendorp, {J. G.} and H. Moeini and {BESIII Collaboration}",

year = "2014",

month = may,

day = "19",

doi = "10.1103/PhysRevD.89.092008",

language = "English",

volume = "89",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "AMER PHYSICAL SOC",

number = "9",

}

TY - JOUR

T1 - Observation of electromagnetic Dalitz decays J/psi -> Pe(+)e(-)

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Bondarenko, O.

AU - Kalantar-Nayestanaki, Nasser

AU - Kavatsyuk, M.

AU - Loehner, H.

AU - Messchendorp, J. G.

AU - Moeini, H.

AU - BESIII Collaboration

PY - 2014/5/19

Y1 - 2014/5/19

N2 - Based on a sample of (225.3 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, the electromagnetic Dalitz decays of J/psi -> Pe(+)e(-)(P = eta'/eta/pi(0)) are studied. By reconstructing the pseudoscalar mesons in various decay modes, the decays J/psi -> eta'e(+)e(-), J/psi -> eta e(+)e(-), and J/psi -> pi(0)e(+)e(-) are observed for the first time. The branching fractions are determined to be B(J/psi -> eta'e(+)e(-)) = (5.81 +/- 0.16 +/- 0.31) x 10(-5), B(J/psi -> eta e(+)e(-)) = (1.16 +/- 0.07 +/- 0.06) x 10(-5), and B(J/psi -> pi(0)e(+)e(-)) = (7.56 +/- 1.32 +/- 0.50) x 10(-7), where the first errors are statistical and the second ones systematic.

AB - Based on a sample of (225.3 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, the electromagnetic Dalitz decays of J/psi -> Pe(+)e(-)(P = eta'/eta/pi(0)) are studied. By reconstructing the pseudoscalar mesons in various decay modes, the decays J/psi -> eta'e(+)e(-), J/psi -> eta e(+)e(-), and J/psi -> pi(0)e(+)e(-) are observed for the first time. The branching fractions are determined to be B(J/psi -> eta'e(+)e(-)) = (5.81 +/- 0.16 +/- 0.31) x 10(-5), B(J/psi -> eta e(+)e(-)) = (1.16 +/- 0.07 +/- 0.06) x 10(-5), and B(J/psi -> pi(0)e(+)e(-)) = (7.56 +/- 1.32 +/- 0.50) x 10(-7), where the first errors are statistical and the second ones systematic.

KW - TRANSITION FORM-FACTORS

KW - VECTOR-MESONS

KW - OMEGA

KW - DETECTOR

KW - BESIII

KW - CMD-2

KW - PAIR

KW - PHI

U2 - 10.1103/PhysRevD.89.092008

DO - 10.1103/PhysRevD.89.092008

M3 - Article

SN - 1550-7998

VL - 89

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - 092008

ER -

Observation of electromagnetic Dalitz decays J/psi -> Pe(+)e(-)

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