Observation of ψ(3770)→ππJ/ψ and measurement of Γee[ψ(2S)]

被引：63

作者：

Adam, NE ^{[1
]}

Alexander, JP

Berkelman, K

Cassel, DG

Crede, V

Duboscq, JE

Ecklund, KM

Ehrlich, R

Fields, L

Galik, RS

Gibbons, L

Gittelman, B

Gray, R

Gray, SW

Hartill, DL

Heltsley, BK

Hertz, D

Jones, CD

Kandaswamy, J

Kreinick, DL

Kuznetsov, VE

Mahlke-Krüger, H

Meyer, TO

Onyisi, PUE

Patterson, JR

Peterson, D

Phillips, EA

Pivarski, J

Riley, D

Ryd, A

Sadoff, AJ

Schwarthoff, H

Shi, X

Shepherd, MR

Stroiney, S

Sun, WM

Urner, D

Wilksen, T

Weaver, KM

Weinberger, M

Athar, SB

Avery, P

Breva-Newell, L

Patel, R

Potlia, V

Stoeck, H

Yelton, J

Rubin, P

Cawlfield, C

Eisenstein, BI

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

[6] Univ Kansas, Lawrence, KS 66045 USA

[7] Luther Coll, Decorah, IA 52101 USA

[8] Univ Minnesota, Minneapolis, MN 55455 USA

[9] Northwestern Univ, Evanston, IL 60208 USA

[10] SUNY Albany, Albany, NY 12222 USA

[11] Univ Oklahoma, Norman, OK 73019 USA

[12] Univ Pittsburgh, Pittsburgh, PA 15260 USA

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

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

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

[16] Univ Rochester, Rochester, NY 14627 USA

[17] So Methodist Univ, Dallas, TX 75275 USA

[18] Syracuse Univ, Syracuse, NY 13244 USA

[19] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.96.082004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe signals for the decays psi(3770)-> XJ/psi from data acquired with the CLEO detector operating at the CESR e(+)e(-) collider with root s=3773 MeV. We measure the following branching fractions B(psi(3770)-> XJ/psi) and significances: (189 +/- 20 +/- 20)x10(-5) (11.6 sigma) for X=pi(+)pi(-), (80 +/- 25 +/- 16)x10(-5) (3.4 sigma) for X=pi(0)pi(0), and (87 +/- 33 +/- 22)x10(-5) (3.5 sigma) for X=eta, where the errors are statistical and systematic, respectively. The radiative return process e(+)e(-)->gamma psi(2S) populates the same event sample and is used to measure Gamma(ee)[psi(2S)]=(2.54 +/- 0.03 +/- 0.11) keV.

引用

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