Further experimental studies of two-body radiative Υ decays

G. Masek; H. P. Paar; R. Mahapatra; R. A. Briere; G. P. Chen; T. Ferguson; G. Tatishvili; H. Vogel; N. E. Adam; J. P. Alexander; C. Bebek; K. Berkelman; F. Blanc; V. Boisvert; D. G. Cassel; P. S. Drell; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; R. S. Galik; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; A. Magerkurth; H. Mahlke-Krüger; T. O. Meyer; N. B. Mistry; E. Nordberg; M. Palmer; J. R. Patterson; D. Peterson; J. Pivarski; D. Riley; A. J. Sadoff; H. Schwarthoff; M. R. Shepherd; J. G. Thayer; D. Urner; B. Valant-Spaight; G. Viehhauser; A. Warburton; M. Weinberger; S. B. Athar; P. Avery

doi:10.1103/PhysRevD.65.072002

Further experimental studies of two-body radiative Υ decays

G. Masek
, H. P. Paar
, R. Mahapatra
, R. A. Briere
, G. P. Chen
, T. Ferguson
, G. Tatishvili
, H. Vogel
, N. E. Adam
, J. P. Alexander
, C. Bebek
, K. Berkelman
, F. Blanc
, V. Boisvert
, D. G. Cassel
, P. S. Drell
, J. E. Duboscq
, K. M. Ecklund
, R. Ehrlich
, R. S. Galik

L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger, T. O. Meyer, N. B. Mistry, E. Nordberg, M. Palmer, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer, D. Urner, B. Valant-Spaight, G. Viehhauser, A. Warburton, M. Weinberger, S. B. Athar, P. Avery

Physics and Astronomy (Twin Cities)

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

12 Scopus citations

Abstract

Continuing our studies of radiative Υ decays, we report on a search for Υ→γη and f_j(2220) in 61.3 pb^-1 of e⁺e^- data taken with the CLEO II detector at the Cornell Electron Storage Ring. For the γη search the three decays of the η meson to π⁺ π^- π⁰, π⁰ π⁰ π⁰, and γγ were investigated. We found no candidate events in the (3 π)⁰ modes and no significant excess over expected backgrounds in the γγ mode to set a limit on the branching fraction of B(Y→γη)< 2.1 × 10^-5 at 90% C.L. The three charged two-body final states hh̄(h = π⁺, K⁺, p) were investigated for f_j(2220) production, with one, one, and two events found, respectively. Limits at 90% C.L. of B(Υ→γf_j) × B(f_j→hh̄) ∼ 1.5 × 10^-5 have been set for each of these modes. We compare our results to measurements of other radiative Υ decays, to measurements of radiative J/ψ decays, and to theoretical predictions.

Original language	English (US)
Article number	072002
Pages (from-to)	720021-7200210
Number of pages	189
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	65
Issue number	7 A
DOIs	https://doi.org/10.1103/PhysRevD.65.072002
State	Published - Apr 1 2002

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10.1103/PhysRevD.65.072002

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Masek, G., Paar, H. P., Mahapatra, R., Briere, R. A., Chen, G. P., Ferguson, T., Tatishvili, G., Vogel, H., Adam, N. E., Alexander, J. P., Bebek, C., Berkelman, K., Blanc, F., Boisvert, V., Cassel, D. G., Drell, P. S., Duboscq, J. E., Ecklund, K. M., Ehrlich, R., ... Avery, P. (2002). Further experimental studies of two-body radiative Υ decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 65(7 A), 720021-7200210. Article 072002. https://doi.org/10.1103/PhysRevD.65.072002

Masek, G, Paar, HP, Mahapatra, R, Briere, RA, Chen, GP, Ferguson, T, Tatishvili, G, Vogel, H, Adam, NE, Alexander, JP, Bebek, C, Berkelman, K, Blanc, F, Boisvert, V, Cassel, DG, Drell, PS, Duboscq, JE, Ecklund, KM, Ehrlich, R, Galik, RS, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hsu, L, Jones, CD, Kandaswamy, J, Kreinick, DL, Magerkurth, A, Mahlke-Krüger, H, Meyer, TO, Mistry, NB, Nordberg, E, Palmer, M, Patterson, JR, Peterson, D, Pivarski, J, Riley, D, Sadoff, AJ, Schwarthoff, H, Shepherd, MR, Thayer, JG, Urner, D, Valant-Spaight, B, Viehhauser, G, Warburton, A, Weinberger, M, Athar, SB & Avery, P 2002, 'Further experimental studies of two-body radiative Υ decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 65, no. 7 A, 072002, pp. 720021-7200210. https://doi.org/10.1103/PhysRevD.65.072002

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title = "Further experimental studies of two-body radiative Υ decays",

abstract = "Continuing our studies of radiative Υ decays, we report on a search for Υ→γη and fj(2220) in 61.3 pb-1 of e+e- data taken with the CLEO II detector at the Cornell Electron Storage Ring. For the γη search the three decays of the η meson to π+ π- π0, π0 π0 π0, and γγ were investigated. We found no candidate events in the (3 π)0 modes and no significant excess over expected backgrounds in the γγ mode to set a limit on the branching fraction of B(Y→γη)< 2.1 × 10-5 at 90\% C.L. The three charged two-body final states h{\=h}(h = π+, K+, p) were investigated for fj(2220) production, with one, one, and two events found, respectively. Limits at 90\% C.L. of B(Υ→γfj) × B(fj→h{\=h}) ∼ 1.5 × 10-5 have been set for each of these modes. We compare our results to measurements of other radiative Υ decays, to measurements of radiative J/ψ decays, and to theoretical predictions.",

author = "G. Masek and Paar, \{H. P.\} and R. Mahapatra and Briere, \{R. A.\} and Chen, \{G. P.\} and T. Ferguson and G. Tatishvili and H. Vogel and Adam, \{N. E.\} and Alexander, \{J. P.\} and C. Bebek and K. Berkelman and F. Blanc and V. Boisvert and Cassel, \{D. G.\} and Drell, \{P. S.\} and Duboscq, \{J. E.\} and Ecklund, \{K. M.\} and R. Ehrlich and Galik, \{R. S.\} and L. Gibbons and B. Gittelman and Gray, \{S. W.\} and Hartill, \{D. L.\} and Heltsley, \{B. K.\} and L. Hsu and Jones, \{C. D.\} and J. Kandaswamy and Kreinick, \{D. L.\} and A. Magerkurth and H. Mahlke-Kr{\"u}ger and Meyer, \{T. O.\} and Mistry, \{N. B.\} and E. Nordberg and M. Palmer and Patterson, \{J. R.\} and D. Peterson and J. Pivarski and D. Riley and Sadoff, \{A. J.\} and H. Schwarthoff and Shepherd, \{M. R.\} and Thayer, \{J. G.\} and D. Urner and B. Valant-Spaight and G. Viehhauser and A. Warburton and M. Weinberger and Athar, \{S. B.\} and P. Avery",

year = "2002",

month = apr,

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doi = "10.1103/PhysRevD.65.072002",

language = "English (US)",

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pages = "720021--7200210",

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T1 - Further experimental studies of two-body radiative Υ decays

AU - Masek, G.

AU - Paar, H. P.

AU - Mahapatra, R.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Ferguson, T.

AU - Tatishvili, G.

AU - Vogel, H.

AU - Adam, N. E.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berkelman, K.

AU - Blanc, F.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Drell, P. S.

AU - Duboscq, J. E.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hsu, L.

AU - Jones, C. D.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Magerkurth, A.

AU - Mahlke-Krüger, H.

AU - Meyer, T. O.

AU - Mistry, N. B.

AU - Nordberg, E.

AU - Palmer, M.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Pivarski, J.

AU - Riley, D.

AU - Sadoff, A. J.

AU - Schwarthoff, H.

AU - Shepherd, M. R.

AU - Thayer, J. G.

AU - Urner, D.

AU - Valant-Spaight, B.

AU - Viehhauser, G.

AU - Warburton, A.

AU - Weinberger, M.

AU - Athar, S. B.

AU - Avery, P.

PY - 2002/4/1

Y1 - 2002/4/1

N2 - Continuing our studies of radiative Υ decays, we report on a search for Υ→γη and fj(2220) in 61.3 pb-1 of e+e- data taken with the CLEO II detector at the Cornell Electron Storage Ring. For the γη search the three decays of the η meson to π+ π- π0, π0 π0 π0, and γγ were investigated. We found no candidate events in the (3 π)0 modes and no significant excess over expected backgrounds in the γγ mode to set a limit on the branching fraction of B(Y→γη)< 2.1 × 10-5 at 90% C.L. The three charged two-body final states hh̄(h = π+, K+, p) were investigated for fj(2220) production, with one, one, and two events found, respectively. Limits at 90% C.L. of B(Υ→γfj) × B(fj→hh̄) ∼ 1.5 × 10-5 have been set for each of these modes. We compare our results to measurements of other radiative Υ decays, to measurements of radiative J/ψ decays, and to theoretical predictions.

AB - Continuing our studies of radiative Υ decays, we report on a search for Υ→γη and fj(2220) in 61.3 pb-1 of e+e- data taken with the CLEO II detector at the Cornell Electron Storage Ring. For the γη search the three decays of the η meson to π+ π- π0, π0 π0 π0, and γγ were investigated. We found no candidate events in the (3 π)0 modes and no significant excess over expected backgrounds in the γγ mode to set a limit on the branching fraction of B(Y→γη)< 2.1 × 10-5 at 90% C.L. The three charged two-body final states hh̄(h = π+, K+, p) were investigated for fj(2220) production, with one, one, and two events found, respectively. Limits at 90% C.L. of B(Υ→γfj) × B(fj→hh̄) ∼ 1.5 × 10-5 have been set for each of these modes. We compare our results to measurements of other radiative Υ decays, to measurements of radiative J/ψ decays, and to theoretical predictions.

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U2 - 10.1103/PhysRevD.65.072002

DO - 10.1103/PhysRevD.65.072002

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SN - 0556-2821

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

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

IS - 7 A

M1 - 072002

ER -

Further experimental studies of two-body radiative Υ decays

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