Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)

M. Ablikim; M. N. Achasov; O. Albayrak; D. J. Ambrose; F. F. An; Q. An; J. Z. Bai; R. Baldini Ferroli; Y. Ban; J. Becker; J. V. Bennett; M. Bertani; J. M. Bian; E. Boger; O. Bondarenko; I. Boyko; R. A. Briere; V. Bytev; H. Cai; X. Cai; O. Cakir; A. Calcaterra; G. F. Cao; S. A. Cetin; J. F. Chang; G. Chelkov; G. Chen; H. S. Chen; J.C. Chen; M.L. Chen; S. J. Chen; X. Chen; Y.B. Chen; H. P. Cheng; Y. P. Chu; D. Cronin-Hennessy; H. L. Dai; J.P. Dai; D. Dedovich; Z. Y. Deng; A. Denig; I. Denysenko; M. Destefanis; W. M. Ding; Y. Ding; N. Kalantar-Nayestanaki; M. Kavatsyuk; H. Loehner; J. G. Messchendorp; H. Moeini; BESIII Collaboration

doi:10.1103/PhysRevD.87.092011

Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)

M. Ablikim^*, M. N. Achasov, O. Albayrak, D. J. Ambrose, F. F. An, Q. An, J. Z. Bai, R. Baldini Ferroli, Y. Ban, J. Becker, J. V. Bennett, M. Bertani, J. M. Bian, E. Boger, O. Bondarenko, I. Boyko, R. A. Briere, V. Bytev, H. Cai, X. CaiO. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J.C. Chen, M.L. Chen, S. J. Chen, X. Chen, Y.B. Chen, H. P. Cheng, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J.P. Dai, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, W. M. Ding, Y. Ding, N. Kalantar-Nayestanaki, M. Kavatsyuk, H. Loehner, J. G. Messchendorp, H. Moeini, BESIII Collaboration

^*Corresponding author for this work

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

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Abstract

Based on a sample of 225.3 million J/psi events accumulated with the BESIII detector at the BEPCII, the decays of eta' -> pi(+)pi(-) l(+)l(-) are studied via J/psi -> gamma eta'. A clear eta' signal is observed in the pi(+)pi(-) e(+)e(-) mass spectrum, and the branching fraction is measured to be B(eta' -> pi(+)pi(-) e(+)e(-)) = (2.11 +/- 0.12(stat) +/- 0.14(syst)) x 10(-3), which is in good agreement with theoretical predictions and the previous measurement, but is determined with much higher precision. No eta' signal is found in the pi(+)pi(-) mu(+)mu(-) mass spectrum, and the upper limit is determined to be B(eta' -> pi(+)pi(-) mu(+)mu(-)) <2.9 x 10(-5) at the 90% confidence level.

Original language	English
Article number	092011
Number of pages	8
Journal	Physical Review D
Volume	87
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.87.092011
Publication status	Published - 28-May-2013

Keywords

MESON
DECAYS

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Ablikim, M., Achasov, M. N., Albayrak, O., Ambrose, D. J., An, F. F., An, Q., Bai, J. Z., Ferroli, R. B., Ban, Y., Becker, J., Bennett, J. V., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, H., ... BESIII Collaboration (2013). Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-). Physical Review D, 87(9), Article 092011. https://doi.org/10.1103/PhysRevD.87.092011

@article{e6c37e22231548528ebbceb0fd73aab3,

title = "Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)",

abstract = "Based on a sample of 225.3 million J/psi events accumulated with the BESIII detector at the BEPCII, the decays of eta' -> pi(+)pi(-) l(+)l(-) are studied via J/psi -> gamma eta'. A clear eta' signal is observed in the pi(+)pi(-) e(+)e(-) mass spectrum, and the branching fraction is measured to be B(eta' -> pi(+)pi(-) e(+)e(-)) = (2.11 +/- 0.12(stat) +/- 0.14(syst)) x 10(-3), which is in good agreement with theoretical predictions and the previous measurement, but is determined with much higher precision. No eta' signal is found in the pi(+)pi(-) mu(+)mu(-) mass spectrum, and the upper limit is determined to be B(eta' -> pi(+)pi(-) mu(+)mu(-)) <2.9 x 10(-5) at the 90% confidence level.",

keywords = "MESON, DECAYS",

author = "M. Ablikim and Achasov, {M. N.} and O. Albayrak and Ambrose, {D. J.} and An, {F. F.} and Q. An and Bai, {J. Z.} and Ferroli, {R. Baldini} and Y. Ban and J. Becker and Bennett, {J. V.} and M. Bertani and Bian, {J. M.} and E. Boger and O. Bondarenko and I. Boyko and Briere, {R. A.} and V. Bytev and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and J.C. Chen and M.L. Chen and Chen, {S. J.} and X. Chen and Y.B. Chen and Cheng, {H. P.} and Chu, {Y. P.} and D. Cronin-Hennessy and Dai, {H. L.} and J.P. Dai and D. Dedovich and Deng, {Z. Y.} and A. Denig and I. Denysenko and M. Destefanis and Ding, {W. M.} and Y. Ding and N. Kalantar-Nayestanaki and M. Kavatsyuk and H. Loehner and Messchendorp, {J. G.} and H. Moeini and {BESIII Collaboration}",

note = "Library comment: authors and affiliations checked",

year = "2013",

month = may,

day = "28",

doi = "10.1103/PhysRevD.87.092011",

language = "English",

volume = "87",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "AMER PHYSICAL SOC",

number = "9",

}

Ablikim, M, Achasov, MN, Albayrak, O, Ambrose, DJ, An, FF, An, Q, Bai, JZ, Ferroli, RB, Ban, Y, Becker, J, Bennett, JV, Bertani, M, Bian, JM, Boger, E, Bondarenko, O, Boyko, I, Briere, RA, Bytev, V, Cai, H, Cai, X, Cakir, O, Calcaterra, A, Cao, GF, Cetin, SA, Chang, JF, Chelkov, G, Chen, G, Chen, HS, Chen, JC, Chen, ML, Chen, SJ, Chen, X, Chen, YB, Cheng, HP, Chu, YP, Cronin-Hennessy, D, Dai, HL, Dai, JP, Dedovich, D, Deng, ZY, Denig, A, Denysenko, I, Destefanis, M, Ding, WM, Ding, Y, Kalantar-Nayestanaki, N , Kavatsyuk, M, Loehner, H, Messchendorp, JG, Moeini, H & BESIII Collaboration 2013, 'Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)', Physical Review D, vol. 87, no. 9, 092011. https://doi.org/10.1103/PhysRevD.87.092011

TY - JOUR

T1 - Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Albayrak, O.

AU - Ambrose, D. J.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Ferroli, R. Baldini

AU - Ban, Y.

AU - Becker, J.

AU - Bennett, J. V.

AU - Bertani, M.

AU - Bian, J. M.

AU - Boger, E.

AU - Bondarenko, O.

AU - Boyko, I.

AU - Briere, R. A.

AU - Bytev, V.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J.C.

AU - Chen, M.L.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, Y.B.

AU - Cheng, H. P.

AU - Chu, Y. P.

AU - Cronin-Hennessy, D.

AU - Dai, H. L.

AU - Dai, J.P.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Denysenko, I.

AU - Destefanis, M.

AU - Ding, W. M.

AU - Ding, Y.

AU - Kalantar-Nayestanaki, N.

AU - Kavatsyuk, M.

AU - Loehner, H.

AU - Messchendorp, J. G.

AU - Moeini, H.

AU - BESIII Collaboration

N1 - Library comment: authors and affiliations checked

PY - 2013/5/28

Y1 - 2013/5/28

N2 - Based on a sample of 225.3 million J/psi events accumulated with the BESIII detector at the BEPCII, the decays of eta' -> pi(+)pi(-) l(+)l(-) are studied via J/psi -> gamma eta'. A clear eta' signal is observed in the pi(+)pi(-) e(+)e(-) mass spectrum, and the branching fraction is measured to be B(eta' -> pi(+)pi(-) e(+)e(-)) = (2.11 +/- 0.12(stat) +/- 0.14(syst)) x 10(-3), which is in good agreement with theoretical predictions and the previous measurement, but is determined with much higher precision. No eta' signal is found in the pi(+)pi(-) mu(+)mu(-) mass spectrum, and the upper limit is determined to be B(eta' -> pi(+)pi(-) mu(+)mu(-)) <2.9 x 10(-5) at the 90% confidence level.

AB - Based on a sample of 225.3 million J/psi events accumulated with the BESIII detector at the BEPCII, the decays of eta' -> pi(+)pi(-) l(+)l(-) are studied via J/psi -> gamma eta'. A clear eta' signal is observed in the pi(+)pi(-) e(+)e(-) mass spectrum, and the branching fraction is measured to be B(eta' -> pi(+)pi(-) e(+)e(-)) = (2.11 +/- 0.12(stat) +/- 0.14(syst)) x 10(-3), which is in good agreement with theoretical predictions and the previous measurement, but is determined with much higher precision. No eta' signal is found in the pi(+)pi(-) mu(+)mu(-) mass spectrum, and the upper limit is determined to be B(eta' -> pi(+)pi(-) mu(+)mu(-)) <2.9 x 10(-5) at the 90% confidence level.

KW - MESON

KW - DECAYS

U2 - 10.1103/PhysRevD.87.092011

DO - 10.1103/PhysRevD.87.092011

M3 - Article

SN - 1550-7998

VL - 87

JO - Physical Review D

JF - Physical Review D

IS - 9

M1 - 092011

ER -

Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)

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Keywords

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