A Study of single photon production in e+ e- annihilation at S**(1/2) = 58-GeV

We have studied single photon production in e + e − annihilation based on a data sample corresponding to an integrated luminosity of 164.1 pb −1 at s =58 GeV . The single photon yield is consistent with the prediction of the standard model with three light neutrino species. No anomalous signal has been observed. From this result left- and right-handed scalar electrons in the mass degenerate case are excluded at 90% CL below 44.4 GeV/ c 2 for the massless photino.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
neutrino: pair production
pair production: neutrino
photon: electroproduction
electroproduction: photon
yield: (photon)
neutrino: flavor

References(19)

Figures(0)

Neutrino Counting in e+ e- Collisions

K.J.F. Gaemers
(
- NIKHEF, Amsterdam
)
,
R. Gastmans
(
- Leuven U.
)
,
F.M. Renard
(
- Montpellier U.
)

- Phys.Rev.D 19 (1979) 1605
•
DOI:
- 10.1103/PhysRevD.19.1605

A Direct measurement of the Z0 invisible width by single photon counting

OPAL

Collaboration

•

M.Z. Akrawy

et al.

- Z.Phys.C 50 (1991) 373-384
•
DOI:
- 10.1007/BF01551449

A Direct determination of the number of light neutrino families from e+ e- ---> neutrino anti-neutrino gamma at LEP

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 275 (1992) 209-221,
- Phys. Lett. B275 (1992) 209-221 and CERN Geneva - L3-035 (91/11,rec.Mar.92) 23 p.,
- Phys.Lett.B 277 (1992) 530-530 (erratum)
•
DOI:
- 10.1016/0370-2693(92)90877-7

A Direct measurement of the invisible width of the Z from single photon counting

ALEPH

Collaboration

•

D. Buskulic
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 313 (1993) 520-534
•
DOI:
- 10.1016/0370-2693(93)90027-F

Phenomenology of the Production, Decay, and Detection of New Hadronic States Associated with Supersymmetry

Glennys R. Farrar
(
- Caltech
)
,
Pierre Fayet
(
- Caltech
)

- Phys.Lett.B 76 (1978) 575-579
•
DOI:
- 10.1016/0370-2693(78)90858-4

Supersymmetric Relics from the Big Bang

- Nucl.Phys.B 238 (1984) 453-476,
- IN *BATAVIA 1984, PROCEEDINGS, INNER SPACE/OUTER SPACE*, 458-459.,
•
DOI:
- 10.1016/0550-3213(84)90461-9

Measurement of R and Search for New Heavy Quarks in $e^+ e^-$ Annihilation at 50-{GeV} and 52-{GeV} Center-of-mass Energies

Venus

Collaboration

•

H. Yoshida
(
- Fukui U.
)

et al.

- Phys.Lett.B 198 (1987) 570
•
DOI:
- 10.1016/0370-2693(87)90920-8

Performance of a lead scintillation fiber calorimeter designed as an active beam shield for the VENUS detector

et al.

- Nucl.Instrum.Meth.A 322 (1992) 211-215
•
DOI:
- 10.1016/0168-9002(92)90030-8

A STUDY ON SINGLE PHOTON PRODUCTION AT s**(1/2) = 54-GeV TO 61.4-GeV

Venus

Collaboration

•

K. Abe
(
- Tohoku U.
)

et al.

- Phys.Lett.B 232 (1989) 431-436
•
DOI:
- 10.1016/0370-2693(89)90769-7

Higher Order Corrections to the Process $e^+ e^- \to$ Neutrino Anti-neutrino $\gamma$

R. Miquel
(
- Barcelona, Autonoma U.
)
,
C. Mana
(
- Madrid, CIEMAT
)
,
M. Martinez
(
- CERN
)

- Z.Phys.C 48 (1990) 309-314
•
DOI:
- 10.1007/BF01554481

Radiative Bhabha Scattering for Singly Tagged and Untagged Configurations

D. Karlen
(
- SLAC
)

- Nucl.Phys.B 289 (1987) 23-35
•
DOI:
- 10.1016/0550-3213(87)90369-5

Radiative Correction to $e^+ e^- \to \gamma \gamma$ in Electroweak Theory

Junpei Fujimoto
(
- Nagoya U.
)
,
Masataka Igarashi
(
- Tokai U., Hiratsuka
)
,
Yoshimitsu Shimizu
(
- KEK, Tsukuba
)

- Prog.Theor.Phys. 77 (1987) 118
•
DOI:
- 10.1143/PTP.77.118

Measurement of the Differential Cross-sections of $e^+ e^- \to \gamma \gamma$ and $e^+ e^- \to \gamma \gamma \gamma$ at $\sqrt{s}=55$ -{GeV}, 56-{GeV}, 56.5-{GeV} and 57-{GeV} and Search for Unstable Photino Pair Production

VENUS

Collaboration

•

K. Abe
(
- Tohoku U.
)

et al.

- Z.Phys.C 45 (1989) 175
•
DOI:
- 10.1007/BF01674449

Study of the $e^+ e^-\to\mu^+ \mu^- \gamma$ reaction at center-of-mass energies between 54 and 64 GeV

VENUS

Collaboration

•

Y. Yonezawa
(
- Tsukuba U., Inst. Appl. Phys.
)

et al.

- Phys.Lett.B 264 (1991) 212-218
•
DOI:
- 10.1016/0370-2693(91)90730-E

- Phys.Rev.D 30 30

Search for the Anomalous Production of Single Photons in $e^+ e^-$ Annihilation at $\sqrt{s}=29$ -{GeV}

C. Hearty
(
- Washington U., Seattle
)
,
J.E. Rothberg
(
- Washington U., Seattle
)
,
K.K. Young
(
- Washington U., Seattle
)
,
A.S. Johnson
(
- Boston U.
)
,
John Scott Whitaker
(
- Boston U.
)

et al.

- Phys.Rev.D 39 (1989) 3207
•
DOI:
- 10.1103/PhysRevD.39.3207

Neutrino Counting With the Cello Detector and Search for Supersymmetric Particles

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

et al.

- Phys.Lett.B 215 (1988) 186-194
•
DOI:
- 10.1016/0370-2693(88)91094-5

Search for Single Photons From Radiative Neutrino or Supersymmetric Particle Production

et al.

- Phys.Rev.D 33 (1986) 3472
•
DOI:
- 10.1103/PhysRevD.33.3472

Search for Supersymmetric Particles Using Acoplanar Charged Particle Pairs From $\Z^0$ Decays

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 236 (1990) 86,
- Phys. Lett. B236 (1990) 86-94 and CERN Geneva - CERN-EP 89-158 (89,rec.Jan.90) 21 p
•
DOI:
- 10.1016/0370-2693(90)90600-B