First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0

CLEO Collaboration

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We report on a study of exclusive radiative decays of the ϒ(1S) resonance collected with the CLEO II detector operating at the Cornell Electron Storage Ring. We present the first observation of the radiative decays ?(1S)→γπ+#x03C0;- and ϒ(1S)→ γ #x03C0;0#x03C0;0. For the dipion mass regime m#x03C0;#x03C0; > 1.0 GeV we obtain B(ϒ(1S)→ γ#x03C0;+#x03C0;-)=(6.3±1.2±1.3)×10-5 and B(ϒ(1S)→ γ#x03C0;0#x03C0;0)=(1.7±0.6±0.3)×10-5.

Original languageEnglish
Pages (from-to)286-290
Number of pages5
JournalPhysical Review Letters
Volume82
Issue number2
DOIs
Publication statusPublished - 1999 Jan 1

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decay
detectors
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

CLEO Collaboration. / First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0. In: Physical Review Letters. 1999 ; Vol. 82, No. 2. pp. 286-290.
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title = "First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0",
abstract = "We report on a study of exclusive radiative decays of the ϒ(1S) resonance collected with the CLEO II detector operating at the Cornell Electron Storage Ring. We present the first observation of the radiative decays ?(1S)→γπ+#x03C0;- and ϒ(1S)→ γ #x03C0;0#x03C0;0. For the dipion mass regime m#x03C0;#x03C0; > 1.0 GeV we obtain B(ϒ(1S)→ γ#x03C0;+#x03C0;-)=(6.3±1.2±1.3)×10-5 and B(ϒ(1S)→ γ#x03C0;0#x03C0;0)=(1.7±0.6±0.3)×10-5.",
author = "{CLEO Collaboration} and A. Anastassov and Duboscq, {J. E.} and Gan, {K. K.} and T. Hart and K. Honscheid and H. Kagan and R. Kass and J. Lee and H. Schwarthoff and A. Wolf and Zoeller, {M. M.} and Richichi, {S. J.} and H. Severini and P. Skubic and A. Undrus and M. Bishai and S. Chen and J. Fast and Hinson, {J. W.} and N. Menon and Miller, {D. H.} and Shibata, {E. I.} and Shipsey, {I. P.J.} and S. Glenn and Youngjoon Kwon and Lyon, {A. L.} and S. Roberts and Thorndike, {E. H.} and Jessop, {C. P.} and K. Lingel and H. Marsiske and Perl, {M. L.} and V. Savinov and D. Ugolini and X. Zhou and Coan, {T. E.} and V. Fadeyev and I. Korolkov and Y. Maravin and I. Narsky and R. Stroynowski and J. Ye and T. Wlodek and M. Artuso and E. Dambasuren and S. Kopp and Moneti, {G. C.} and R. Mountain and S. Schuh and T. Skwarnicki",
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First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0. / CLEO Collaboration.

In: Physical Review Letters, Vol. 82, No. 2, 01.01.1999, p. 286-290.

Research output: Contribution to journalArticle

TY - JOUR

T1 - First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0

AU - CLEO Collaboration

AU - Anastassov, A.

AU - Duboscq, J. E.

AU - Gan, K. K.

AU - Hart, T.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Schwarthoff, H.

AU - Wolf, A.

AU - Zoeller, M. M.

AU - Richichi, S. J.

AU - Severini, H.

AU - Skubic, P.

AU - Undrus, A.

AU - Bishai, M.

AU - Chen, S.

AU - Fast, J.

AU - Hinson, J. W.

AU - Menon, N.

AU - Miller, D. H.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Glenn, S.

AU - Kwon, Youngjoon

AU - Lyon, A. L.

AU - Roberts, S.

AU - Thorndike, E. H.

AU - Jessop, C. P.

AU - Lingel, K.

AU - Marsiske, H.

AU - Perl, M. L.

AU - Savinov, V.

AU - Ugolini, D.

AU - Zhou, X.

AU - Coan, T. E.

AU - Fadeyev, V.

AU - Korolkov, I.

AU - Maravin, Y.

AU - Narsky, I.

AU - Stroynowski, R.

AU - Ye, J.

AU - Wlodek, T.

AU - Artuso, M.

AU - Dambasuren, E.

AU - Kopp, S.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Schuh, S.

AU - Skwarnicki, T.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We report on a study of exclusive radiative decays of the ϒ(1S) resonance collected with the CLEO II detector operating at the Cornell Electron Storage Ring. We present the first observation of the radiative decays ?(1S)→γπ+#x03C0;- and ϒ(1S)→ γ #x03C0;0#x03C0;0. For the dipion mass regime m#x03C0;#x03C0; > 1.0 GeV we obtain B(ϒ(1S)→ γ#x03C0;+#x03C0;-)=(6.3±1.2±1.3)×10-5 and B(ϒ(1S)→ γ#x03C0;0#x03C0;0)=(1.7±0.6±0.3)×10-5.

AB - We report on a study of exclusive radiative decays of the ϒ(1S) resonance collected with the CLEO II detector operating at the Cornell Electron Storage Ring. We present the first observation of the radiative decays ?(1S)→γπ+#x03C0;- and ϒ(1S)→ γ #x03C0;0#x03C0;0. For the dipion mass regime m#x03C0;#x03C0; > 1.0 GeV we obtain B(ϒ(1S)→ γ#x03C0;+#x03C0;-)=(6.3±1.2±1.3)×10-5 and B(ϒ(1S)→ γ#x03C0;0#x03C0;0)=(1.7±0.6±0.3)×10-5.

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U2 - 10.1103/PhysRevLett.82.286

DO - 10.1103/PhysRevLett.82.286

M3 - Article

VL - 82

SP - 286

EP - 290

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 2

ER -