Observation of η′ Decays to π+ π- π0 and π+ π- e+ e-

被引：35

作者：

Naik, P. ^{[1
]}

Rademacker, J. ^{[1
]}

Asner, D. M. ^{[2
]}

Edwards, K. W. ^{[2
]}

Reed, J. ^{[2
]}

Robichaud, A. N. ^{[2
]}

Tatishvili, G. ^{[2
]}

Briere, R. A. ^{[3
]}

Vogel, H. ^{[3
]}

Onyisi, P. U. E. ^{[4
]}

Rosner, J. L. ^{[4
]}

Alexander, J. P. ^{[5
]}

Cassel, D. G. ^{[5
]}

Duboscq, J. E. ^{[5
]}

Ehrlich, R. ^{[5
]}

Fields, L. ^{[5
]}

Galik, R. S. ^{[5
]}

Gibbons, L. ^{[5
]}

Gray, R. ^{[5
]}

Gray, S. W. ^{[5
]}

Hartill, D. L. ^{[5
]}

Heltsley, B. K. ^{[5
]}

Hertz, D. ^{[5
]}

Hunt, J. M. ^{[5
]}

Kandaswamy, J. ^{[5
]}

Kreinick, D. L. ^{[5
]}

Kuznetsov, V. E. ^{[5
]}

Ledoux, J. ^{[5
]}

Mahlke-Krueger, H. ^{[5
]}

Mohapatra, D. ^{[5
]}

Patterson, J. R. ^{[5
]}

Peterson, D. ^{[5
]}

Riley, D. ^{[5
]}

Ryd, A. ^{[5
]}

Sadoff, A. J. ^{[5
]}

Shi, X. ^{[5
]}

Stroiney, S. ^{[5
]}

Sun, W. M. ^{[5
]}

Wilksen, T. ^{[5
]}

Athar, S. B. ^{[6
]}

Yelton, J. ^{[6
]}

Rubin, P. ^{[7
]}

Mehrabyan, S. ^{[8
]}

Lowrey, N. ^{[8
]}

Selen, M. ^{[8
]}

White, E. J. ^{[8
]}

Wiss, J. ^{[8
]}

Mitchell, R. E. ^{[9
]}

Shepherd, M. R. ^{[9
]}

Besson, D. ^{[10
]}

机构：

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

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

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

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

[5] Cornell Univ, Ithaca, NY 14853 USA

[6] Univ Florida, Gainesville, FL 32611 USA

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

[8] Univ Illinois, Urbana, IL 61801 USA

[9] Indiana Univ, Bloomington, IN 47405 USA

[10] Univ Kansas, Lawrence, KS 66045 USA

[11] Luther Coll, Decorah, IA 52101 USA

[12] Univ Minnesota, Minneapolis, MN 55455 USA

[13] Northwestern Univ, Evanston, IL 60208 USA

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

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

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

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

[18] Univ Rochester, Rochester, NY 14627 USA

[19] Syracuse Univ, Syracuse, NY 13244 USA

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

[21] Rice Univ, Houston, TX 77005 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 06期

基金：

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

关键词：

MESON; VIOLATION; DETECTOR;

D O I：

10.1103/PhysRevLett.102.061801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using psi(2S) -> pi(+) pi(-) J/psi, J/psi -> gamma eta' events acquired with the CLEO-c detector at the CESR e(+) e(-) collider, we make the first observations of the decays eta' -> pi(+) pi(-) pi(0) and eta' -> pi(+) pi(-) e(+) e(-), measuring absolute branching fractions (37(-9)(+11) +/- 4) x 10(-4) and (25(-9)(+12) +/- 5) x 10(-4), respectively. For eta' -> pi(+) pi(-) pi(0), this result probes the mechanism of isospin violation and the roles of pi(0)/eta/eta'-mixing and final state rescattering in strong decays. We also set upper limits on branching fractions for eta' decays to pi(+) pi(-) mu(+) mu(-), 2(pi(+) pi(-)), pi(+) pi(-) 2 pi(0), 2(pi(+) pi(-))pi(0), 3(pi(+) pi(-)), and invisible final states.

引用

页数：5

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