Two Photon Excitation of the Tensor Meson F0 (1270)

We have measured charged particle pair production in two-photon scattering at thee+e− storage ring PETRA. While the main source of such events is the production of lepton pairs, the presence of an additional process is clearly indicated by the measured invariant mass distribution of the two particles and their angular distributions. We determine that the excess is mainly due to the decayf0(1270)→π+π-. We derive a width Γ(f0→γγ)=3.2±0.2±0.6 keV (statistical and systematic).

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: INELASTIC SCATTERING
INELASTIC SCATTERING: ELECTRON POSITRON
EXCHANGE: TWO-PHOTON
TWO-PHOTON: EXCHANGE
CHARGED PARTICLE: PAIR PRODUCTION
PAIR PRODUCTION: CHARGED PARTICLE
F(1270): ELECTROPRODUCTION
ELECTROPRODUCTION: F(1270)

References(24)

Figures(0)

Proposal for measuring the pi0 lifetime by pi- production in electron electron or electron - positron collisions

F.E. Low
(
- MIT, LNS
)

- Phys.Rev. 120 (1960) 582-583
•
DOI:
- 10.1103/PhysRev.120.582

Particle Creation in Electron-Electron Collisions

F. Calogero
(
- INFN, Rome
)
,
C. Zemach
(
- INFN, Rome
)

- Phys.Rev. 120 (1960) 1860-1866
•
DOI:
- 10.1103/PhysRev.120.1860

S wave dipion production by colliding electron beams

P.C. Decelles
(
- Notre Dame U.
)
,
J.F. Goehl
(
- Notre Dame U.
)

- Phys.Rev. 184 (1969) 1617-1621
•
DOI:
- 10.1103/PhysRev.184.1617

Gamma gamma collisions with almost real photons

A. Jaccarini
(
- College de France
)
,
N. Arteaga-Romero
(
- College de France
)
,
J. Parisi
(
- College de France
)
,
P. Kessler
(
- College de France
)

- Lett.Nuovo Cim. 4S1 (1970) 933-937,
- Lett.Nuovo Cim. 4 (1970) 933-937
•
DOI:
- 10.1007/BF02755183

- JETP Lett. 11 388

- Phys.Rev. 150 181

Multihadron production through the photon-photon interaction

et al.

- Lett.Nuovo Cim. 10S2 (1974) 435-439,
- Lett.Nuovo Cim. 10 (1974) 435-439
•
DOI:
- 10.1007/BF02788156

First Observation of Photon - Photon Interactions at Doris

et al.

- Phys.Lett.B 81 (1979) 79-83
•
DOI:
- 10.1016/0370-2693(79)90720-2

Measurement of the Radiative Width of the eta-prime in Two Photon Interactions at SPEAR

G.S. Abrams
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
M.S. Alam
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
C.A. Blocker
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
A. Boyarski
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
Martin Breidenbach
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)

et al.

- Phys.Rev.Lett. 43 (1979) 477
•
DOI:
- 10.1103/PhysRevLett.43.477

Lepton and Hadron Pair Production in Two Photon Reactions

PLUTO

Collaboration

•

Christoph Berger
(
- Aachen, Tech. Hochsch.
)

et al.

- Phys.Lett.B 94 (1980) 254-258
•
DOI:
- 10.1016/0370-2693(80)90871-0

A STUDY OF DOUBLE TAGGED TWO PHOTON REACTIONS AT SPEAR

et al.

- Phys.Lett.B 97 (1980) 320
•
DOI:
- 10.1016/0370-2693(80)90610-3

E+ e- Annihilation at High-Energies and Search for the t-Quark Continuum Contribution

TASSO

Collaboration

•

R. Brandelik
(
- Aachen, Tech. Hochsch.
)

et al.

- Z.Phys.C 4 (1980) 87
•
DOI:
- 10.1007/BF01554391

- Phys.Lett.B 83 621

RADIATIVE CORRECTIONS IN PHOTON - PHOTON COLLISIONS INDUCED BY E+ E- OR E+- E+- PROCESSES

G. Cochard
(
- College de France and
- Picardie U.
)
,
S. Ong
(
- College de France and
- Picardie U.
)

- Phys.Rev.D 19 (1979) 810-819
•
DOI:
- 10.1103/PhysRevD.19.810

Luminosity Functions for Two Photon Processes in $e^+ e^-$ Collisions

J.H. Field
(
- DESY
)

- Nucl.Phys.B 168 (1980) 477,
- Abstract Only In *Amiens 1980, Proceedings, Gamma Gamma Collisions*, 386,
- Nucl.Phys.B 176 (1980) 545-546 (erratum)
•
DOI:
- 10.1016/0550-3213(80)90139-X