Observation of η′c production in γγ fusion at CLEO -: art. no. 142001

被引：99

作者：

Asner, DM ^{[1
]}

Dytman, SA

Mehrabyan, S

Mueller, JA

Nam, S

Savinov, V

Huang, GS

Miller, DH

Pavlunin, V

Sanghi, B

Shibata, EI

Shipsey, IPJ

Adams, GS

Chasse, M

Cummings, JP

Danko, I

Napolitano, J

Cronin-Hennessy, D

Park, CS

Park, W

Thayer, JB

Thorndike, EH

Coan, TE

Gao, YS

Liu, F

Stroynowski, R

Artuso, M

Boulahouache, C

Blusk, S

Butt, J

Dambasuren, E

Dorjkhaidav, O

Haynes, J

Menaa, N

Mountain, R

Muramatsu, H

Nandakumar, R

Redjimi, R

Sia, R

Skwarnicki, T

Stone, S

Wang, JC

Zhang, K

Mahmood, AH

Csorna, SE

Bonvicini, G

Cinabro, D

Dubrovin, M

Bornheim, A

Lipeles, E

机构：

[1] Univ Pittsburgh, Pittsburgh, PA 15260 USA

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

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

[4] Univ Rochester, Rochester, NY 14627 USA

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

[6] Syracuse Univ, Syracuse, NY 13244 USA

[7] Univ Texas Pan Amer, Edinburg, TX 78539 USA

[8] Vanderbilt Univ, Nashville, TN 37235 USA

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

[10] CALTECH, Pasadena, CA 91125 USA

[11] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

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

[13] Cornell Univ, Ithaca, NY 14853 USA

[14] Univ Florida, Gainesville, FL 32611 USA

[15] Univ Illinois, Urbana, IL 61801 USA

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

[17] Inst Particle Phys, Toronto, ON, Canada

[18] Univ Kansas, Lawrence, KS 66045 USA

[19] Univ Minnesota, Minneapolis, MN 55455 USA

[20] Northwestern Univ, Evanston, IL 60208 USA

[21] Ohio State Univ, Columbus, OH 43210 USA

[22] Univ Oklahoma, Norman, OK 73019 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.142001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the observation of the eta(c)'(2(1)S(0)), the radial excitation of the eta(c)(1(1)S(0)) ground state of charmonium, in the two-photon fusion reaction gammagamma --> eta(c)' --> (KsK+/-)-K-0 pi(-/+) in 13.6 fb(-1) of CLEO II/ILV data and 13.1 fb(-1) of CLEO III data. We obtain M(eta(c)') = 3642.9 +/- 3.1 (stat) +/- 1.5(syst) MeV and M(eta(c)) = 2981.8 +/- 1.3(stat) +/- 1.5(syst) MeV. The corresponding values of hyperfine splittings between S-1(0) and S-3(1) states are DeltaM(hf)(1S) = 115.1 +/- 2.0 MeV and DeltaM(hf)(2S) = 43.1 +/- 3.4 MeV. Assuming that the eta(c) and eta(c)' have equal branching fractions to K(s)Kpi, we obtain Gamma(gammagamma)(eta(c)') = 1.3 +/- 0.6 keV.

引用

页码：142001 / 1

页数：5

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