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

CLEO Collaboration

doi:10.1103/PhysRevLett.82.286

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

CLEO Collaboration

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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 language	English (US)
Pages (from-to)	286-290
Number of pages	5
Journal	Physical review letters
Volume	82
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.82.286
State	Published - 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.82.286

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@article{6e95f3ffe53746caac8bb4e3a9eb8a41,

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 Y. 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 Lange, \{D. J.\}",

year = "1999",

doi = "10.1103/PhysRevLett.82.286",

language = "English (US)",

volume = "82",

pages = "286--290",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

}

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, Y.

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 - Lange, D. J.

PY - 1999

Y1 - 1999

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.

UR - https://www.scopus.com/pages/publications/0001004545

UR - https://www.scopus.com/pages/publications/0001004545#tab=citedBy

U2 - 10.1103/PhysRevLett.82.286

DO - 10.1103/PhysRevLett.82.286

M3 - Article

AN - SCOPUS:0001004545

SN - 0031-9007

VL - 82

SP - 286

EP - 290

JO - Physical review letters

JF - Physical review letters

IS - 2

ER -

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

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