Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S)

G. Bonvicini; D. Cinabro; A. Lincoln; M. J. Smith; P. Zhou; J. Zhu; P. Naik; J. Rademacker; D. M. Asner; K. W. Edwards; J. Reed; A. N. Robichaud; G. Tatishvili; E. J. White; R. A. Briere; H. Vogel; P. U.E. Onyisi; J. L. Rosner; J. P. Alexander; D. G. Cassel; R. Ehrlich; L. Fields; R. S. Galik; L. Gibbons; S. W. Gray; D. L. Hartill; B. K. Heltsley; J. M. Hunt; D. L. Kreinick; V. E. Kuznetsov; J. Ledoux; H. Mahlke-Krüger; J. R. Patterson; D. Peterson; D. Riley; A. Ryd; A. J. Sadoff; X. Shi; S. Stroiney; W. M. Sun; J. Yelton; P. Rubin; N. Lowrey; S. Mehrabyan; M. Selen; J. Wiss; M. Kornicer; R. E. Mitchell; M. R. Shepherd; C. M. Tarbert; D. Besson; T. K. Pedlar; J. Xavier; D. Cronin-Hennessy; K. Y. Gao; J. Hietala; R. Poling; P. Zweber; S. Dobbs; Z. Metreveli; K. K. Seth; B. J.Y. Tan; A. Tomaradze; S. Brisbane; J. Libby; L. Martin; A. Powell; P. Spradlin; C. Thomas; G. Wilkinson; H. Mendez; J. Y. Ge; D. H. Miller; I. P.J. Shipsey; B. Xin; G. S. Adams; D. Hu; B. Moziak; J. Napolitano; K. M. Ecklund; J. Insler; H. Muramatsu; C. S. Park; E. H. Thorndike; F. Yang; M. Artuso; S. Blusk; S. Khalil; R. Mountain; K. Randrianarivony; T. Skwarnicki; J. C. Wang; L. M. Zhang

doi:10.1103/PhysRevD.81.031104

Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S)

G. Bonvicini, D. Cinabro, A. Lincoln, M. J. Smith, P. Zhou, J. Zhu, P. Naik, J. Rademacker, D. M. Asner, K. W. Edwards, J. Reed, A. N. Robichaud, G. Tatishvili, E. J. White, R. A. Briere, H. Vogel, P. U.E. Onyisi, J. L. Rosner, J. P. Alexander, D. G. CasselR. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, S. W. Gray, D. L. Hartill, B. K. Heltsley, J. M. Hunt, D. L. Kreinick, V. E. Kuznetsov, J. Ledoux, H. Mahlke-Krüger, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, S. Stroiney, W. M. Sun, J. Yelton, P. Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, M. Kornicer, R. E. Mitchell, M. R. Shepherd, C. M. Tarbert, D. Besson, T. K. Pedlar, J. Xavier, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, R. Poling, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, B. J.Y. Tan, A. Tomaradze, S. Brisbane, J. Libby, L. Martin, A. Powell, P. Spradlin, C. Thomas, G. Wilkinson, H. Mendez, J. Y. Ge, D. H. Miller, I. P.J. Shipsey, B. Xin, G. S. Adams, D. Hu, B. Moziak, J. Napolitano, K. M. Ecklund, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, M. Artuso, S. Blusk, S. Khalil, R. Mountain, K. Randrianarivony, T. Skwarnicki, J. C. Wang, L. M. Zhang

Department of Physics

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83 Scopus citations

Abstract

We report evidence for the ground state of bottomonium, ηb(1S), in the radiative decay Υ(3S)→γηb in e⁺e^- annihilation data taken with the CLEO III detector. Using 6×106 Υ(3S) decays, and assuming Γ(ηb)=10±5MeV/c2, we obtain B(Υ(3S)→γηb)=(7.1±1.8±1.3)×10 ^-4, where the first error is statistical and the second is systematic. The statistical significance is ∼4σ. The mass is determined to be M(ηb)=9391.8±6.6±2.0MeV/c2, which corresponds to the hyperfine splitting ΔMhf(1S)b=68.5±6.6±2.0MeV/c2. Using 9×106 Υ(2S) decays, we place an upper limit on the corresponding Υ(2S) decay, B(Υ(2S)→γηb)<8. 4×10^-4 at 90% confidence level.

Original language	English (US)
Article number	031104
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	81
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.81.031104
State	Published - Feb 24 2010

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.81.031104

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Bonvicini, G., Cinabro, D., Lincoln, A., Smith, M. J., Zhou, P., Zhu, J., Naik, P., Rademacker, J., Asner, D. M., Edwards, K. W., Reed, J., Robichaud, A. N., Tatishvili, G., White, E. J., Briere, R. A., Vogel, H., Onyisi, P. U. E., Rosner, J. L., Alexander, J. P., ... Zhang, L. M. (2010). Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S). Physical Review D - Particles, Fields, Gravitation and Cosmology, 81(3), Article 031104. https://doi.org/10.1103/PhysRevD.81.031104

Bonvicini, G, Cinabro, D, Lincoln, A, Smith, MJ, Zhou, P, Zhu, J, Naik, P, Rademacker, J, Asner, DM, Edwards, KW, Reed, J, Robichaud, AN, Tatishvili, G, White, EJ, Briere, RA, Vogel, H, Onyisi, PUE, Rosner, JL, Alexander, JP, Cassel, DG, Ehrlich, R, Fields, L, Galik, RS, Gibbons, L, Gray, SW, Hartill, DL, Heltsley, BK, Hunt, JM, Kreinick, DL, Kuznetsov, VE, Ledoux, J, Mahlke-Krüger, H, Patterson, JR, Peterson, D, Riley, D, Ryd, A, Sadoff, AJ, Shi, X, Stroiney, S, Sun, WM, Yelton, J, Rubin, P, Lowrey, N, Mehrabyan, S, Selen, M, Wiss, J, Kornicer, M, Mitchell, RE, Shepherd, MR, Tarbert, CM, Besson, D, Pedlar, TK, Xavier, J, Cronin-Hennessy, D, Gao, KY, Hietala, J, Poling, R, Zweber, P, Dobbs, S, Metreveli, Z, Seth, KK, Tan, BJY, Tomaradze, A, Brisbane, S, Libby, J, Martin, L, Powell, A, Spradlin, P, Thomas, C, Wilkinson, G, Mendez, H, Ge, JY, Miller, DH, Shipsey, IPJ, Xin, B, Adams, GS, Hu, D, Moziak, B, Napolitano, J, Ecklund, KM, Insler, J, Muramatsu, H, Park, CS, Thorndike, EH, Yang, F, Artuso, M , Blusk, S, Khalil, S, Mountain, R, Randrianarivony, K, Skwarnicki, T, Wang, JC & Zhang, LM 2010, 'Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S)', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 81, no. 3, 031104. https://doi.org/10.1103/PhysRevD.81.031104

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title = "Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S)",

abstract = "We report evidence for the ground state of bottomonium, ηb(1S), in the radiative decay Υ(3S)→γηb in e+e- annihilation data taken with the CLEO III detector. Using 6×106 Υ(3S) decays, and assuming Γ(ηb)=10±5MeV/c2, we obtain B(Υ(3S)→γηb)=(7.1±1.8±1.3)×10 -4, where the first error is statistical and the second is systematic. The statistical significance is ∼4σ. The mass is determined to be M(ηb)=9391.8±6.6±2.0MeV/c2, which corresponds to the hyperfine splitting ΔMhf(1S)b=68.5±6.6±2.0MeV/c2. Using 9×106 Υ(2S) decays, we place an upper limit on the corresponding Υ(2S) decay, B(Υ(2S)→γηb)<8. 4×10-4 at 90% confidence level.",

author = "G. Bonvicini and D. Cinabro and A. Lincoln and Smith, {M. J.} and P. Zhou and J. Zhu and P. Naik and J. Rademacker and Asner, {D. M.} and Edwards, {K. W.} and J. Reed and Robichaud, {A. N.} and G. Tatishvili and White, {E. J.} and Briere, {R. A.} and H. Vogel and Onyisi, {P. U.E.} and Rosner, {J. L.} and Alexander, {J. P.} and Cassel, {D. G.} and R. Ehrlich and L. Fields and Galik, {R. S.} and L. Gibbons and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Hunt, {J. M.} and Kreinick, {D. L.} and Kuznetsov, {V. E.} and J. Ledoux and H. Mahlke-Kr{\"u}ger 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 J. Yelton and P. Rubin and N. Lowrey and S. Mehrabyan and M. Selen and J. Wiss and M. Kornicer and Mitchell, {R. E.} and Shepherd, {M. R.} and Tarbert, {C. M.} and D. Besson and Pedlar, {T. K.} and J. Xavier and D. Cronin-Hennessy and Gao, {K. Y.} and J. Hietala and R. Poling and P. Zweber and S. Dobbs and Z. Metreveli and Seth, {K. K.} and Tan, {B. J.Y.} and A. Tomaradze and S. Brisbane and J. Libby and L. Martin and A. Powell and P. Spradlin and C. Thomas and G. Wilkinson and H. Mendez and Ge, {J. Y.} and Miller, {D. H.} and Shipsey, {I. P.J.} and B. Xin and Adams, {G. S.} and D. Hu and B. Moziak and J. Napolitano and Ecklund, {K. M.} 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 R. Mountain and K. Randrianarivony and T. Skwarnicki and Wang, {J. C.} and Zhang, {L. M.}",

year = "2010",

month = feb,

day = "24",

doi = "10.1103/PhysRevD.81.031104",

language = "English (US)",

volume = "81",

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

issn = "1550-7998",

publisher = "American Institute of Physics",

number = "3",

}

TY - JOUR

T1 - Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S)

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Lincoln, A.

AU - Smith, M. J.

AU - Zhou, P.

AU - Zhu, J.

AU - Naik, P.

AU - Rademacker, J.

AU - Asner, D. M.

AU - Edwards, K. W.

AU - Reed, J.

AU - Robichaud, A. N.

AU - Tatishvili, G.

AU - White, E. J.

AU - Briere, R. A.

AU - Vogel, H.

AU - Onyisi, P. U.E.

AU - Rosner, J. L.

AU - Alexander, J. P.

AU - Cassel, D. G.

AU - Ehrlich, R.

AU - Fields, L.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hunt, J. M.

AU - Kreinick, D. L.

AU - Kuznetsov, V. E.

AU - Ledoux, J.

AU - Mahlke-Krüger, H.

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 - Yelton, J.

AU - Rubin, P.

AU - Lowrey, N.

AU - Mehrabyan, S.

AU - Selen, M.

AU - Wiss, J.

AU - Kornicer, M.

AU - Mitchell, R. E.

AU - Shepherd, M. R.

AU - Tarbert, C. M.

AU - Besson, D.

AU - Pedlar, T. K.

AU - Xavier, J.

AU - Cronin-Hennessy, D.

AU - Gao, K. Y.

AU - Hietala, J.

AU - Poling, R.

AU - Zweber, P.

AU - Dobbs, S.

AU - Metreveli, Z.

AU - Seth, K. K.

AU - Tan, B. J.Y.

AU - Tomaradze, A.

AU - Brisbane, S.

AU - Libby, J.

AU - Martin, L.

AU - Powell, A.

AU - Spradlin, P.

AU - Thomas, C.

AU - Wilkinson, G.

AU - Mendez, H.

AU - Ge, J. Y.

AU - Miller, D. H.

AU - Shipsey, I. P.J.

AU - Xin, B.

AU - Adams, G. S.

AU - Hu, D.

AU - Moziak, B.

AU - Napolitano, J.

AU - Ecklund, K. M.

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 - Mountain, R.

AU - Randrianarivony, K.

AU - Skwarnicki, T.

AU - Wang, J. C.

AU - Zhang, L. M.

PY - 2010/2/24

Y1 - 2010/2/24

N2 - We report evidence for the ground state of bottomonium, ηb(1S), in the radiative decay Υ(3S)→γηb in e+e- annihilation data taken with the CLEO III detector. Using 6×106 Υ(3S) decays, and assuming Γ(ηb)=10±5MeV/c2, we obtain B(Υ(3S)→γηb)=(7.1±1.8±1.3)×10 -4, where the first error is statistical and the second is systematic. The statistical significance is ∼4σ. The mass is determined to be M(ηb)=9391.8±6.6±2.0MeV/c2, which corresponds to the hyperfine splitting ΔMhf(1S)b=68.5±6.6±2.0MeV/c2. Using 9×106 Υ(2S) decays, we place an upper limit on the corresponding Υ(2S) decay, B(Υ(2S)→γηb)<8. 4×10-4 at 90% confidence level.

AB - We report evidence for the ground state of bottomonium, ηb(1S), in the radiative decay Υ(3S)→γηb in e+e- annihilation data taken with the CLEO III detector. Using 6×106 Υ(3S) decays, and assuming Γ(ηb)=10±5MeV/c2, we obtain B(Υ(3S)→γηb)=(7.1±1.8±1.3)×10 -4, where the first error is statistical and the second is systematic. The statistical significance is ∼4σ. The mass is determined to be M(ηb)=9391.8±6.6±2.0MeV/c2, which corresponds to the hyperfine splitting ΔMhf(1S)b=68.5±6.6±2.0MeV/c2. Using 9×106 Υ(2S) decays, we place an upper limit on the corresponding Υ(2S) decay, B(Υ(2S)→γηb)<8. 4×10-4 at 90% confidence level.

UR - http://www.scopus.com/inward/record.url?scp=77749323202&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77749323202&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.81.031104

DO - 10.1103/PhysRevD.81.031104

M3 - Article

AN - SCOPUS:77749323202

SN - 1550-7998

VL - 81

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

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

IS - 3

M1 - 031104

ER -

Measurement of the ηb(1S) mass and the branching fraction for Υ(3S)→γηb(1S)

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