A Search for substructure of leptons and quarks with the CELLO detector

Differential cross section data of the CELLO experiment on pair production of muons, taus, and heavy quarks ine+e−-annihilation are presented and analysed, together with our data on Bhabha scattering, in terms of compositeness effects characterized by the mass scale Λ. We discuss difficulties in the combination of limits Λ from different experiments. The appropriate parameter to combine different results turns out to be ɛ=±1/Λ2, which is in contrast to Λ Gaussian distributed.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
electron positron: elastic scattering
elastic scattering: electron positron
muon: electroproduction
electroproduction: muon
tau: electroproduction
electroproduction: tau

References(11)

Figures(0)

New Tests for Quark and Lepton Substructure

E. Eichten
(
- Fermilab and
- Chicago U., EFI
)
,
Kenneth D. Lane
(
- Ohio State U.
)
,
Michael E. Peskin
(
- SLAC
)

- Phys.Rev.Lett. 50 (1983) 811-814,
•
DOI:
- 10.1103/PhysRevLett.50.811

Super Collider Physics

- Rev.Mod.Phys. 56 (1984) 579-707,
- Rev.Mod.Phys. 58 (1986) 1065-1073 (addendum)
•
DOI:
- 10.1103/RevModPhys.56.579

A Measurement of the Muon Pair Production in $e^+ e^-$ Annihilation at 38.3-{GeV} $\le \sqrt{s} \le$ 46.8-{GeV}

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

et al.

- Phys.Lett.B 191 (1987) 209-216
•
DOI:
- 10.1016/0370-2693(87)91349-9

$\tau$ Production and Decay With the Cello Detector at {PETRA}

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

et al.

- Phys.Lett.B 222 (1989) 163-172
•
DOI:
- 10.1016/0370-2693(89)90741-7

Are There Heavy Quarks of Mass 23-{GeV}?

- Phys.Lett.B 174 (1986) 224-228
•
DOI:
- 10.1016/0370-2693(86)90746-X

Heavy Quark Charge Asymmetries With the Cello Detector

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

et al.

- Z.Phys.C 47 (1990) 333-342
•
DOI:
- 10.1007/BF01565856

Search for $B^0 - \bar{B}^0$ oscillations at the CERN proton-antiproton collider

UA1

Collaboration

•

C. Albajar
(
- CERN
)

et al.

- Phys.Lett.B 186 (1987) 2, 247-254,
- Phys.Lett.B 197 (1987) 4, 565 (erratum)
•
DOI:
- 10.1016/0370-2693(87)90288-7

Observation of B0 - anti-B0 Mixing

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 192 (1987) 245-252,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 369-376,
•
DOI:
- 10.1016/0370-2693(87)91177-4

B0 anti-B0 Mixing at the Upsilon (4S)

CLEO

Collaboration

•

M. Artuso

et al.

- Phys.Rev.Lett. 62 (1989) 2233
•
DOI:
- 10.1103/PhysRevLett.62.2233

Determination of alpha-s and sin**2theta(w) from Measurements of the Total Hadronic Cross-Section in e+ e- Annihilation

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

et al.

- Phys.Lett.B 183 (1987) 400-411
•
DOI:
- 10.1016/0370-2693(87)90986-5

Determination of $\alpha^- s$ and the $\Z^0$ Mass From Measurements of the Total Hadronic Cross-section in $e^+ e^-$ Annihilation

G. D'Agostini
(
- Rome U. and
- INFN, Rome
)
,
W. de Boer
(
- Munich, Max Planck Inst.
)
,
Guenter Grindhammer
(
- Munich, Max Planck Inst. and
- SLAC
)

- Phys.Lett.B 229 (1989) 160-168
•
DOI:
- 10.1016/0370-2693(89)90176-7