Observation of the hc(1P1) state of charmonium -: art. no. 102003

被引：111

作者：

Rosner, JL

Adam, NE

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

机构：

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

[2] Cornell Univ, Ithaca, NY 14853 USA

[3] Univ Florida, Gainesville, FL 32611 USA

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

[5] Univ Illinois, Urbana, IL 61801 USA

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

[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] SUNY Albany, Albany, NY 12222 USA

[12] Univ Oklahoma, Norman, OK 73019 USA

[13] Univ Pittsburgh, Pittsburgh, PA 15260 USA

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

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

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

[17] Univ Rochester, Rochester, NY 14627 USA

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

[19] Syracuse Univ, Syracuse, NY 13244 USA

[20] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.95.102003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The h(c)(P-1(1)) state of charmonium has been observed in the reaction psi(2S)->pi(0)h(c)->(gamma gamma)(gamma eta(c)) using 3.08x10(6) psi(2S) decays recorded in the CLEO detector. Data have been analyzed both for the inclusive reaction, where the decay products of the eta(c) are not identified, and for exclusive reactions, in which eta(c) decays are reconstructed in seven hadronic decay channels. We find M(h(c))=3524.4 +/- 0.6 +/- 0.4 MeV which corresponds to a hyperfine splitting Delta M-hf(1P)equivalent to < M(P-3(J))>-M(P-1(1))=+1.0 +/- 0.6 +/- 0.4 MeV, and B(psi(2S)->pi(0)h(c))xB(h(c)->gamma eta(c))=(4.0 +/- 0.8 +/- 0.7)x10(-4).

引用

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