A Search for $\eta'_c$ Production in Photon-Photon Fusion at LEP

A search for the production of the η ′ c meson, the first radial excitation of the ground state of charmonium η c (2980), in the photon–photon fusion reaction at LEP has been performed using the data collected by the DELPHI detector during 1992–1996. No evidence of η ′ c production is found in the mass region 3520–3800 MeV/c 2 . An upper limit for the ratio of the two-photon widths of the η ′ c and η c is obtained.

Note:

13 pages

electron positron: colliding beams
exchange: two-photon
photon photon: fusion
eta/c(2980): photoproduction
eta/c(3590): search for
eta/c(3590): hadronic decay
eta/c(2980): hadronic decay
width: ratio
upper limit
DELPHI

References(28)

Figures(0)

[1]

Heavy Quark Systems

Waikwok Kwong
(
- Chicago U., EFI and
- Chicago U.
)
,
Jonathan L. Rosner
(
- Chicago U., EFI and
- Chicago U.
)
,
Chris Quigg
(
- Fermilab
)

- Ann.Rev.Nucl.Part.Sci. 37 (1987) 325-382
•
DOI:
- 10.1146/annurev.ns.37.120187.001545

[1]

An Introduction to Charm and Heavy Quark Physics

F.J. Gilman

[2]

High Resolution Charmonium Spectroscopy By Antiproton Annihilation - E760 and Beyond

K.K. Seth

[3]

Observation of an eta(c)-prime Candidate State with Mass 3592-MeV +- 5-MeV

et al.

- Phys.Rev.Lett. 48 (1982) 70
•
DOI:
- 10.1103/PhysRevLett.48.70

[4]

Review of particle physics. Particle Data Group

et al.

- Phys.Rev.D 54 (1996) 1, 1-720
•
DOI:
- 10.1103/PhysRevD.54.1

[5]

Physics in Two-Photon interactions

S. Kawabata

[6]

Mesons with beauty and charm: Spectroscopy

Estia J. Eichten
(
- Fermilab
)
,
Chris Quigg
(
- Fermilab
)

- Phys.Rev.D 49 (1994) 5845-5856
•
e-Print:
- hep-ph/9402210
•
DOI:
- 10.1103/PhysRevD.49.5845

[6]

private communications

[7]

Quarkonium physics and alpha-strong from quarkonia

Junko Shigemitsu
(
- Ohio State U.
)

- Nucl.Phys.B Proc.Suppl. 53 (1997) 16-22,
- Lattice 96:16-22
•
e-Print:
- hep-lat/9608058
•
DOI:
- 10.1016/S0920-5632(96)00595-6

[7]

private communications

P.B. Mackenzie

[8]

Quarkonium wave functions at the origin

Estia J. Eichten
(
- Fermilab
)
,
Chris Quigg
(
- Fermilab and
- Cornell U., LNS
)

- Phys.Rev.D 52 (1995) 1726-1728
•
e-Print:
- hep-ph/9503356
•
DOI:
- 10.1103/PhysRevD.52.1726

[9]

Prospects for detecting an eta(c)-prime in two photon processes

Ted Barnes
(
- Oak Ridge and
- Tennessee U.
)
,
T.E. Browder
(
- Hawaii U.
)
,
S.F. Tuan
(
- Hawaii U.
)

- Phys.Lett.B 385 (1996) 391-394
•
e-Print:
- hep-ph/9605278
•
DOI:
- 10.1016/0370-2693(96)00878-7

[10]

Study of the eta(c) (s wave singlet) state of charmonium formed in anti-p p annihilations and a search for the eta(c)-prime (s wave doublet)

E760

Collaboration

•

T.A. Armstrong
(
- Penn State U.
)

et al.

- Phys.Rev.D 52 (1995) 4839-4854
•
DOI:
- 10.1103/PhysRevD.52.4839

[11]

First Results from E835

G. Zioulas

[11]

Open Problems in Physics of Charmonium and QCD Exotics

K.K. Seth

[12]

Determination of the radiative decay width of the eta(c) meson

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 338 (1994) 390-396
•
DOI:
- 10.1016/0370-2693(94)91395-1

[12]

Measurement of eta(c) production in untagged two photon collisions at LEP

L3

Collaboration

•

O. Adriani

et al.

- Phys.Lett.B 318 (1993) 575-582,
- Phys. Lett. B318 (1993) 575-582. and CERN Geneva - CERN-PPE-93-173 (93/09,rec.Feb.94) 17 p
•
DOI:
- 10.1016/0370-2693(93)91558-5