Inclusive radiative J/ψ decays

D. Besson; T. K. Pedlar; D. Cronin-Hennessy; K. Y. Gao; J. Hietala; Y. Kubota; T. Klein; B. W. Lang; R. Poling; A. W. Scott; P. Zweber; Sean A Dobbs; Z. Metreveli; Kamal K Seth; Amiran Tomaradze; J. Libby; A. Powell; G. Wilkinson; K. M. Ecklund; W. Love; V. Savinov; H. Mendez; J. Y. Ge; D. H. Miller; I. P.J. Shipsey; B. Xin; G. S. Adams; M. Anderson; J. P. Cummings; I. Danko; D. Hu; B. Moziak; J. Napolitano; Q. He; J. Insler; H. Muramatsu; C. S. Park; E. H. Thorndike; F. Yang; M. Artuso; S. Blusk; S. Khalil; J. Li; R. Mountain; S. Nisar; K. Randrianarivony; N. Sultana; T. Skwarnicki; S. Stone; J. C. Wang; L. M. Zhang; G. Bonvicini; D. Cinabro; M. Dubrovin; A. Lincoln; P. Naik; J. Rademacker; D. M. Asner; K. W. Edwards; J. Reed; R. A. Briere; T. Ferguson; G. Tatishvili; H. Vogel; M. E. Watkins; J. L. Rosner; J. P. Alexander; D. G. Cassel; J. E. Duboscq; R. Ehrlich; L. Fields; R. S. Galik; L. Gibbons; R. Gray; S. W. Gray; D. L. Hartill; B. K. Heltsley; D. Hertz; J. M. Hunt; J. Kandaswamy; D. L. Kreinick; V. E. Kuznetsov; J. Ledoux; H. Mahlke-Krüger; D. Mohapatra; P. U.E. Onyisi; J. R. Patterson; D. Peterson; D. Riley; A. Ryd; A. J. Sadoff; X. Shi; S. Stroiney; W. M. Sun; T. Wilksen; S. B. Athar; R. Patel; J. Yelton; P. Rubin; B. I. Eisenstein; I. Karliner; S. Mehrabyan; N. Lowrey; M. Selen; E. J. White; J. Wiss; R. E. Mitchell; M. R. Shepherd

doi:10.1103/PhysRevD.78.032012

Inclusive radiative J/ψ decays

D. Besson^*, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, P. Zweber, Sean A Dobbs, Z. Metreveli, Kamal K Seth, Amiran Tomaradze, J. Libby, A. Powell, G. Wilkinson, K. M. Ecklund, W. LoveV. Savinov, H. Mendez, J. Y. Ge, D. H. Miller, I. P.J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, D. Hu, B. Moziak, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, M. Artuso, S. Blusk, S. Khalil, J. Li, R. Mountain, S. Nisar, K. Randrianarivony, N. Sultana, T. Skwarnicki, S. Stone, J. C. Wang, L. M. Zhang, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, P. Naik, J. Rademacker, D. M. Asner, K. W. Edwards, J. Reed, R. A. Briere, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, J. P. Alexander, D. G. Cassel, J. E. Duboscq, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, J. M. Hunt, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, J. Ledoux, H. Mahlke-Krüger, D. Mohapatra, P. U.E. Onyisi, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, S. B. Athar, R. Patel, J. Yelton, P. Rubin, B. I. Eisenstein, I. Karliner, S. Mehrabyan, N. Lowrey, M. Selen, E. J. White, J. Wiss, R. E. Mitchell, M. R. Shepherd

^*Corresponding author for this work

Physics and Astronomy

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Abstract

Using data taken with the CLEO-c detector at the Cornell Electron Storage Ring, we have investigated the direct-photon momentum spectrum in the decay J/ψ(1S)→γgg, via the "tagged" process: e+e-→ψ(2S); ψ(2S)→J/ψπ+π-; J/ψ→γ+X. Including contributions from two-body radiative decay processes, we find the ratio of the inclusive direct-photon branching fraction to that of the dominant three-gluon branching fraction [Rγ=B(ggγ)/B(ggg)] to be Rγ=0.137±0.001±0.016±0.004, where the errors shown are statistical, systematic, and the model-dependent uncertainty related to the extrapolation to zero photon energy. The shape of the scaled photon energy spectrum in J/ψ→ggγ is observed to be very similar to that of Υ→ggγ. The Rγ value obtained is roughly consistent with that expected by a simple quark-charge scaling [Rγ∼(qc/qb)2] of the value determined at the Υ(1S), but somewhat higher than the value expected from the running of the strong coupling constant.

Original language	English (US)
Article number	032012
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	78
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.78.032012
State	Published - Aug 19 2008

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.78.032012

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Besson, D., Pedlar, T. K., Cronin-Hennessy, D., Gao, K. Y., Hietala, J., Kubota, Y., Klein, T., Lang, B. W., Poling, R., Scott, A. W., Zweber, P., Dobbs, S. A., Metreveli, Z., Seth, K. K., Tomaradze, A., Libby, J., Powell, A., Wilkinson, G., Ecklund, K. M., ... Shepherd, M. R. (2008). Inclusive radiative J/ψ decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 78(3), [032012]. https://doi.org/10.1103/PhysRevD.78.032012

@article{a343383050984f9ea075b25d9a9f984a,

title = "Inclusive radiative J/ψ decays",

abstract = "Using data taken with the CLEO-c detector at the Cornell Electron Storage Ring, we have investigated the direct-photon momentum spectrum in the decay J/ψ(1S)→γgg, via the {"}tagged{"} process: e+e-→ψ(2S); ψ(2S)→J/ψπ+π-; J/ψ→γ+X. Including contributions from two-body radiative decay processes, we find the ratio of the inclusive direct-photon branching fraction to that of the dominant three-gluon branching fraction [Rγ=B(ggγ)/B(ggg)] to be Rγ=0.137±0.001±0.016±0.004, where the errors shown are statistical, systematic, and the model-dependent uncertainty related to the extrapolation to zero photon energy. The shape of the scaled photon energy spectrum in J/ψ→ggγ is observed to be very similar to that of Υ→ggγ. The Rγ value obtained is roughly consistent with that expected by a simple quark-charge scaling [Rγ∼(qc/qb)2] of the value determined at the Υ(1S), but somewhat higher than the value expected from the running of the strong coupling constant.",

author = "D. Besson and Pedlar, {T. K.} and D. Cronin-Hennessy and Gao, {K. Y.} and J. Hietala and Y. Kubota and T. Klein and Lang, {B. W.} and R. Poling and Scott, {A. W.} and P. Zweber and Dobbs, {Sean A} and Z. Metreveli and Seth, {Kamal K} and Amiran Tomaradze and J. Libby and A. Powell and G. Wilkinson and Ecklund, {K. M.} and W. Love and V. Savinov and H. Mendez and Ge, {J. Y.} and Miller, {D. H.} and Shipsey, {I. P.J.} and B. Xin and Adams, {G. S.} and M. Anderson and Cummings, {J. P.} and I. Danko and D. Hu and B. Moziak and J. Napolitano and Q. He and J. Insler and H. Muramatsu and Park, {C. S.} and Thorndike, {E. H.} and F. Yang and M. Artuso and S. Blusk and S. Khalil and J. Li and R. Mountain and S. Nisar and K. Randrianarivony and N. Sultana and T. Skwarnicki and S. Stone and Wang, {J. C.} and Zhang, {L. M.} and G. Bonvicini and D. Cinabro and M. Dubrovin and A. Lincoln and P. Naik and J. Rademacker and Asner, {D. M.} and Edwards, {K. W.} and J. Reed and Briere, {R. A.} and T. Ferguson and G. Tatishvili and H. Vogel and Watkins, {M. E.} and Rosner, {J. L.} and Alexander, {J. P.} and Cassel, {D. G.} and Duboscq, {J. E.} and R. Ehrlich and L. Fields and Galik, {R. S.} and L. Gibbons and R. Gray and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and D. Hertz and Hunt, {J. M.} and J. Kandaswamy and Kreinick, {D. L.} and Kuznetsov, {V. E.} and J. Ledoux and H. Mahlke-Kr{\"u}ger and D. Mohapatra and Onyisi, {P. U.E.} and Patterson, {J. R.} and D. Peterson and D. Riley and A. Ryd and Sadoff, {A. J.} and X. Shi and S. Stroiney and Sun, {W. M.} and T. Wilksen and Athar, {S. B.} and R. Patel and J. Yelton and P. Rubin and Eisenstein, {B. I.} and I. Karliner and S. Mehrabyan and N. Lowrey and M. Selen and White, {E. J.} and J. Wiss and Mitchell, {R. E.} and Shepherd, {M. R.}",

year = "2008",

month = aug,

day = "19",

doi = "10.1103/PhysRevD.78.032012",

language = "English (US)",

volume = "78",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "3",

}

Besson, D, Pedlar, TK, Cronin-Hennessy, D, Gao, KY, Hietala, J, Kubota, Y, Klein, T, Lang, BW, Poling, R, Scott, AW, Zweber, P, Dobbs, SA, Metreveli, Z, Seth, KK, Tomaradze, A, Libby, J, Powell, A, Wilkinson, G, Ecklund, KM, Love, W, Savinov, V, Mendez, H, Ge, JY, Miller, DH, Shipsey, IPJ, Xin, B, Adams, GS, Anderson, M, Cummings, JP, Danko, I, Hu, D, Moziak, B, Napolitano, J, He, Q, Insler, J, Muramatsu, H, Park, CS, Thorndike, EH, Yang, F, Artuso, M, Blusk, S, Khalil, S, Li, J, Mountain, R, Nisar, S, Randrianarivony, K, Sultana, N, Skwarnicki, T, Stone, S, Wang, JC, Zhang, LM, Bonvicini, G, Cinabro, D, Dubrovin, M, Lincoln, A, Naik, P, Rademacker, J, Asner, DM, Edwards, KW, Reed, J, Briere, RA, Ferguson, T, Tatishvili, G, Vogel, H, Watkins, ME, Rosner, JL, Alexander, JP, Cassel, DG, Duboscq, JE, Ehrlich, R, Fields, L, Galik, RS, Gibbons, L, Gray, R, Gray, SW, Hartill, DL, Heltsley, BK, Hertz, D, Hunt, JM, Kandaswamy, J, Kreinick, DL, Kuznetsov, VE, Ledoux, J, Mahlke-Krüger, H, Mohapatra, D, Onyisi, PUE, Patterson, JR, Peterson, D, Riley, D, Ryd, A, Sadoff, AJ, Shi, X, Stroiney, S, Sun, WM, Wilksen, T, Athar, SB, Patel, R, Yelton, J, Rubin, P, Eisenstein, BI, Karliner, I, Mehrabyan, S, Lowrey, N, Selen, M, White, EJ, Wiss, J, Mitchell, RE & Shepherd, MR 2008, 'Inclusive radiative J/ψ decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 78, no. 3, 032012. https://doi.org/10.1103/PhysRevD.78.032012

TY - JOUR

T1 - Inclusive radiative J/ψ decays

AU - Besson, D.

AU - Pedlar, T. K.

AU - Cronin-Hennessy, D.

AU - Gao, K. Y.

AU - Hietala, J.

AU - Kubota, Y.

AU - Klein, T.

AU - Lang, B. W.

AU - Poling, R.

AU - Scott, A. W.

AU - Zweber, P.

AU - Dobbs, Sean A

AU - Metreveli, Z.

AU - Seth, Kamal K

AU - Tomaradze, Amiran

AU - Libby, J.

AU - Powell, A.

AU - Wilkinson, G.

AU - Ecklund, K. M.

AU - Love, W.

AU - Savinov, V.

AU - Mendez, H.

AU - Ge, J. Y.

AU - Miller, D. H.

AU - Shipsey, I. P.J.

AU - Xin, B.

AU - Adams, G. S.

AU - Anderson, M.

AU - Cummings, J. P.

AU - Danko, I.

AU - Hu, D.

AU - Moziak, B.

AU - Napolitano, J.

AU - He, Q.

AU - Insler, J.

AU - Muramatsu, H.

AU - Park, C. S.

AU - Thorndike, E. H.

AU - Yang, F.

AU - Artuso, M.

AU - Blusk, S.

AU - Khalil, S.

AU - Li, J.

AU - Mountain, R.

AU - Nisar, S.

AU - Randrianarivony, K.

AU - Sultana, N.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Wang, J. C.

AU - Zhang, L. M.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Dubrovin, M.

AU - Lincoln, A.

AU - Naik, P.

AU - Rademacker, J.

AU - Asner, D. M.

AU - Edwards, K. W.

AU - Reed, J.

AU - Briere, R. A.

AU - Ferguson, T.

AU - Tatishvili, G.

AU - Vogel, H.

AU - Watkins, M. E.

AU - Rosner, J. L.

AU - Alexander, J. P.

AU - Cassel, D. G.

AU - Duboscq, J. E.

AU - Ehrlich, R.

AU - Fields, L.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gray, R.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hertz, D.

AU - Hunt, J. M.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Kuznetsov, V. E.

AU - Ledoux, J.

AU - Mahlke-Krüger, H.

AU - Mohapatra, D.

AU - Onyisi, P. U.E.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Ryd, A.

AU - Sadoff, A. J.

AU - Shi, X.

AU - Stroiney, S.

AU - Sun, W. M.

AU - Wilksen, T.

AU - Athar, S. B.

AU - Patel, R.

AU - Yelton, J.

AU - Rubin, P.

AU - Eisenstein, B. I.

AU - Karliner, I.

AU - Mehrabyan, S.

AU - Lowrey, N.

AU - Selen, M.

AU - White, E. J.

AU - Wiss, J.

AU - Mitchell, R. E.

AU - Shepherd, M. R.

PY - 2008/8/19

Y1 - 2008/8/19

N2 - Using data taken with the CLEO-c detector at the Cornell Electron Storage Ring, we have investigated the direct-photon momentum spectrum in the decay J/ψ(1S)→γgg, via the "tagged" process: e+e-→ψ(2S); ψ(2S)→J/ψπ+π-; J/ψ→γ+X. Including contributions from two-body radiative decay processes, we find the ratio of the inclusive direct-photon branching fraction to that of the dominant three-gluon branching fraction [Rγ=B(ggγ)/B(ggg)] to be Rγ=0.137±0.001±0.016±0.004, where the errors shown are statistical, systematic, and the model-dependent uncertainty related to the extrapolation to zero photon energy. The shape of the scaled photon energy spectrum in J/ψ→ggγ is observed to be very similar to that of Υ→ggγ. The Rγ value obtained is roughly consistent with that expected by a simple quark-charge scaling [Rγ∼(qc/qb)2] of the value determined at the Υ(1S), but somewhat higher than the value expected from the running of the strong coupling constant.

AB - Using data taken with the CLEO-c detector at the Cornell Electron Storage Ring, we have investigated the direct-photon momentum spectrum in the decay J/ψ(1S)→γgg, via the "tagged" process: e+e-→ψ(2S); ψ(2S)→J/ψπ+π-; J/ψ→γ+X. Including contributions from two-body radiative decay processes, we find the ratio of the inclusive direct-photon branching fraction to that of the dominant three-gluon branching fraction [Rγ=B(ggγ)/B(ggg)] to be Rγ=0.137±0.001±0.016±0.004, where the errors shown are statistical, systematic, and the model-dependent uncertainty related to the extrapolation to zero photon energy. The shape of the scaled photon energy spectrum in J/ψ→ggγ is observed to be very similar to that of Υ→ggγ. The Rγ value obtained is roughly consistent with that expected by a simple quark-charge scaling [Rγ∼(qc/qb)2] of the value determined at the Υ(1S), but somewhat higher than the value expected from the running of the strong coupling constant.

UR - http://www.scopus.com/inward/record.url?scp=50449092850&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50449092850&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.78.032012

DO - 10.1103/PhysRevD.78.032012

M3 - Article

AN - SCOPUS:50449092850

SN - 1550-7998

VL - 78

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 3

M1 - 032012

ER -

Inclusive radiative J/ψ decays

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