Study of ψ(2S) decays to γp(p)over-bar, π0 p(p)over-bar, and ηp(p)over-bar, and search for p(p)over-bar threshold enhancements

被引：75

作者：

Alexander, J. P. ^{[1
]}

Cassel, D. G. ^{[1
]}

Das, S. ^{[1
]}

Ehrlich, R. ^{[1
]}

Fields, L. ^{[1
]}

Gibbons, L. ^{[1
]}

Gray, S. W. ^{[1
]}

Hartill, D. L. ^{[1
]}

Heltsley, B. K. ^{[1
]}

Kreinick, D. L. ^{[1
]}

Kuznetsov, V. E. ^{[1
]}

Patterson, J. R. ^{[1
]}

Peterson, D. ^{[1
]}

Riley, D. ^{[1
]}

Ryd, A. ^{[1
]}

Sadoff, A. J. ^{[1
]}

Shi, X. ^{[1
]}

Sun, W. M. ^{[1
]}

Yelton, J. ^{[2
]}

Rubin, P. ^{[3
]}

Lowrey, N. ^{[4
]}

Mehrabyan, S. ^{[4
]}

Selen, M. ^{[4
]}

Wiss, J. ^{[4
]}

Libby, J. ^{[5
]}

Kornicer, M. ^{[6
]}

Mitchell, R. E. ^{[6
]}

Shepherd, M. R. ^{[6
]}

Tarbert, C. M. ^{[6
]}

Besson, D. ^{[7
]}

Pedlar, T. K. ^{[8
]}

Xavier, J. ^{[8
]}

Cronin-Hennessy, D. ^{[9
]}

Hietala, J. ^{[9
]}

Zweber, P. ^{[9
]}

Dobbs, S. ^{[10
]}

Metreveli, Z. ^{[10
]}

Seth, K. K. ^{[10
]}

Tomaradze, A. ^{[10
]}

Xiao, T. ^{[10
]}

Brisbane, S. ^{[11
]}

Martin, L. ^{[11
]}

Powell, A. ^{[11
]}

Spradlin, P. ^{[11
]}

Wilkinson, G. ^{[11
]}

Mendez, H. ^{[12
]}

Ge, J. Y. ^{[13
]}

Miller, D. H. ^{[13
]}

Shipsey, I. P. J. ^{[13
]}

Xin, B. ^{[13
]}

机构：

[1] Cornell Univ, Ithaca, NY 14853 USA

[2] Univ Florida, Gainesville, FL 32611 USA

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

[4] Univ Illinois, Urbana, IL 61801 USA

[5] Indian Inst Technol, Madras 600036, Tamil Nadu, India

[6] Indiana Univ, Bloomington, IN 47405 USA

[7] Univ Kansas, Lawrence, KS 66045 USA

[8] Luther Coll, Decorah, IA 52101 USA

[9] Univ Minnesota, Minneapolis, MN 55455 USA

[10] Northwestern Univ, Evanston, IL 60208 USA

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

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

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

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

[15] Rice Univ, Houston, TX 77005 USA

[16] Univ Rochester, Rochester, NY 14627 USA

[17] STFC Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[18] Syracuse Univ, Syracuse, NY 13244 USA

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

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

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

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

[23] Univ Chicago, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW D | 2010年 / 82卷 / 09期

基金：

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; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.82.092002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The decays of psi(2S) into gamma p (p) over bar, pi(0)p (p) over bar, and eta p (p) over bar have been studied with the CLEO-c detector using a sample of 24.5 X 10(6) psi(2S) events obtained from e(+)e(-) annihilations at root s = 3686 MeV. The data show evidence for the excitation of several N* resonances in p pi(0) and p eta channels in pi(0)p (p) over bar and eta p (p) over bar decays, and f(2) states in gamma p (p) over bar decay. Branching fractions for decays of c psi(2S) to gamma p (p) over bar, pi(0)p (p) over bar, and eta p (p) over bar have been determined. No evidence for p (p) over bar threshold enhancements was found in the reactions psi(2S) -> Xp (p) over bar where X = gamma, pi(0), eta. We do, however, find confirming evidence for a p (p) over bar threshold enhancement in J/psi -> gamma p (p) over bar as previously reported by BES.

引用

页数：15

共 50 条

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Onyisi, P. U. E.
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Alexander, J. P.
Cassel, D. G.
Das, S.
Ehrlich, R.
Fields, L.
Gibbons, L.
Gray, S. W.
Hartill, D. L.
Heltsley, B. K.
Hunt, J. M.
Kreinick, D. L.
Kuznetsov, V. E.
Ledoux, J.
Patterson, J. R.
Peterson, D.
Riley, D.
Ryd, A.
Sadoff, A. J.
Shi, X.
Sun, W. M.
Yelton, J.
Rubin, P.
Lowrey, N.
Mehrabyan, S.
Selen, M.
Wiss, J.
Adams, S.
Kornicer, M.
Mitchell, R. E.
Shepherd, M. R.
Tarbert, C. M.
Besson, D.
Pedlar, T. K.
Xavier, J.
Cronin-Hennessy, D.
Hietala, J.
Zweber, P.
Dobbs, S.
Metreveli, Z.
Seth, K. K.
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