Charmonium decays to γπ0, γη, and γη′

被引：37

作者：

Pedlar, T. K. ^{[1
]}

Xavier, J. ^{[1
]}

Cronin-Hennessy, D. ^{[2
]}

Gao, K. Y. ^{[2
]}

Hietala, J. ^{[2
]}

Klein, T. ^{[2
]}

Poling, R. ^{[2
]}

Zweber, P. ^{[2
]}

Dobbs, S. ^{[3
]}

Metreveli, Z. ^{[3
]}

Seth, K. K. ^{[3
]}

Tan, B. J. Y. ^{[3
]}

Tomaradze, A. ^{[3
]}

Libby, J. ^{[20
]}

Martin, L. ^{[20
]}

Powell, A. ^{[20
]}

Thomas, C. ^{[20
]}

Wilkinson, G. ^{[20
]}

Mendez, H. ^{[4
]}

Ge, J. Y. ^{[5
]}

Miller, D. H. ^{[5
]}

Shipsey, I. P. J. ^{[5
]}

Xin, B. ^{[5
]}

Adams, G. S. ^{[6
]}

Hu, D. ^{[6
]}

Moziak, B. ^{[6
]}

Napolitano, J. ^{[6
]}

Ecklund, K. M. ^{[7
]}

He, Q. ^{[8
]}

Insler, J. ^{[8
]}

Muramatsu, H. ^{[8
]}

Park, C. S. ^{[8
]}

Thorndike, E. H. ^{[8
]}

Yang, F. ^{[8
]}

Artuso, M. ^{[9
]}

Blusk, S. ^{[9
]}

Khalil, S. ^{[9
]}

Mountain, R. ^{[9
]}

Randrianarivony, K. ^{[9
]}

Skwarnicki, T. ^{[9
]}

Stone, S. ^{[9
]}

Wang, J. C. ^{[9
]}

Zhang, L. M. ^{[9
]}

Bonvicini, G. ^{[10
]}

Cinabro, D. ^{[10
]}

Dubrovin, M. ^{[10
]}

Lincoln, A. ^{[10
]}

Smith, M. J. ^{[10
]}

Zhou, P. ^{[10
]}

Zhu, J. ^{[10
]}

机构：

[1] Luther Coll, Decorah, IA 52101 USA

[2] Univ Minnesota, Minneapolis, MN 55455 USA

[3] Northwestern Univ, Evanston, IL 60208 USA

[4] Univ Puerto Rico, Mayaguez, PR 00681 USA

[5] Purdue Univ, W Lafayette, IN 47907 USA

[6] Rensselaer Polytech Inst, Troy, NY 12180 USA

[7] Rice Univ, Houston, TX 77005 USA

[8] Univ Rochester, Rochester, NY 14627 USA

[9] Syracuse Univ, Syracuse, NY 13244 USA

[10] Wayne State Univ, Detroit, MI 48202 USA

[11] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[12] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[13] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[14] Cornell Univ, Ithaca, NY 14853 USA

[15] Univ Florida, Gainesville, FL 32611 USA

[16] George Mason Univ, Fairfax, VA 22030 USA

[17] Univ Illinois, Urbana, IL 61801 USA

[18] Indiana Univ, Bloomington, IN 47405 USA

[19] Univ Kansas, Lawrence, KS 66045 USA

[20] Univ Oxford, Oxford OX1 3RH, England

[21] Univ Bristol, Bristol BS8 1TL, Avon, England

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 11期

基金：

美国国家科学基金会; 英国科学技术设施理事会; 加拿大自然科学与工程研究理事会;

关键词：

PSEUDOSCALAR MESONS; EXCLUSIVE PROCESSES; ANGLE;

D O I：

10.1103/PhysRevD.79.111101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data acquired with the CLEO-c detector at the CESR e(+)e(-) collider, we measure branching fractions for J/psi, psi(2S), and psi(3770) decays to gamma pi(0), gamma eta, and gamma eta'. Defining R-n equivalent to B[psi(nS) -> gamma eta]/B[psi(nS) -> gamma eta'], we obtain R-1 = (21.1 +/- 0.9)% and, unexpectedly, an order of magnitude smaller limit, R-2 < 1.8% at 90% C.L. We also use J/psi -> gamma eta' events to determine branching fractions of improved precision for the five most copious eta' decay modes.

引用

页数：6

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