Search for pair produced leptoquarks in $e^{+} e^{-}$ interactions at $S^{(1/2)}$ approximately = 183-GeV

A search for pair-produced leptoquarks has been performed using a sample of e+e- collision events collected by the OPAL detector at LEP at e+e- centre-of-mass energies of about 183 GeV. The data sample corresponds to an integrated luminosity of 55.9 pb-1. The leptoquarks were assumed to be produced via couplings to the photon and the Z0 and then to decay within a single fermion generation. No evidence for contributions from leptoquark pair production processes was observed. Lower limits on scalar and vector leptoquark masses are obtained. The existing limits are improved in the region of large decay branching ratio to quark-neutrino.

Note:

26 pages, LaTeX, including 9 eps figs, submitted to European Physical Journal C Report-no: CERN-EP/99-091

electron positron: colliding beams
electron positron: annihilation
search for: leptoquark
leptoquark: pair production
leptoquark: semileptonic decay
leptoquark: scalar
leptoquark: vector
leptoquark: coupling
leptoquark: quantum number
leptoquark: mass

References(42)

Figures(0)

Lepton Number as the Fourth Color

Jogesh C. Pati
(
- Maryland U.
)
,
Abdus Salam
(
- ICTP, Trieste and
- Imperial Coll., London
)

- Phys.Rev.D 10 (1974) 275-289,
- Phys.Rev.D 11 (1975) 703-703 (erratum)
•
DOI:
- 10.1103/PhysRevD.10.275

Technicolor

Edward Farhi
(
- CERN
)
,
Leonard Susskind
(
- Stanford U., ITP
)

- Phys.Rept. 74 (1981) 277
•
DOI:
- 10.1016/0370-1573(81)90173-3

LIGHT LEPTOQUARKS

Barbara Schrempp
(
- Hamburg U.
)
,
Fridger Schrempp
(
- Hamburg U.
)

- Phys.Lett.B 153 (1985) 101-107
•
DOI:
- 10.1016/0370-2693(85)91450-9

Low-Energy Phenomenology of Superstring Inspired E(6) Models

JoAnne L. Hewett
(
- Wisconsin U., Madison
)
,
Thomas G. Rizzo
(
- Ames Lab and
- Iowa State U.
)

- Phys.Rept. 183 (1989) 193
•
DOI:
- 10.1016/0370-1573(89)90071-9

Light leptoquarks as possible signature of strong electroweak unification

Paul H. Frampton
(
- North Carolina U.
)

- Mod.Phys.Lett.A 7 (1992) 559-562
•
DOI:
- 10.1142/S0217732392000525

Leptoquarks in Lepton - Quark Collisions

W. Buchmuller
(
- Hannover U. and
- DESY
)
,
R. Ruckl
(
- DESY
)
,
D. Wyler
(
- Zurich, ETH
)

- Phys.Lett.B 191 (1987) 442-448,
- Phys.Lett.B 448 (1999) 320-320 (erratum)
•
DOI:
- 10.1016/0370-2693(87)90637-X

Model independent constraints on leptoquarks from rare processes

Sacha Davidson
(
- UC, Berkeley, Cfpa
)
,
David C. Bailey
(
- Toronto U.
)
,
Bruce A. Campbell
(
- Alberta U.
)

- Z.Phys.C 61 (1994) 613-644
•
e-Print:
- hep-ph/9309310
•
DOI:
- 10.1007/BF01552629

Search for leptoquarks with the ZEUS detector

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Phys.Lett.B 306 (1993) 173-186
•
DOI:
- 10.1016/0370-2693(93)91155-G

A Search for leptoquarks and squarks at HERA

H1

Collaboration

•

T. Ahmed

et al.

- Z.Phys.C 64 (1994) 545-558
•
DOI:
- 10.1007/BF01957769

A Search for leptoquarks at HERA

H1

Collaboration

•

S. Aid

et al.

- Phys.Lett.B 369 (1996) 173-185
•
e-Print:
- hep-ex/9512001
•
DOI:
- 10.1016/0370-2693(95)01601-5

Search for Leptoquarks and FCNC in $e^{+} e^{-}$ annihilations at $S^{(1/2)}$ = 183-GeV

DELPHI

Collaboration

•

P. Abreu

et al.

- Phys.Lett.B 446 (1999) 62-74
•
e-Print:
- hep-ex/9903072
•
DOI:
- 10.1016/S0370-2693(98)01525-1

A Search for scalar leptoquarks in Z0 decays

OPAL

Collaboration

•

G. Alexander
(
- Tel Aviv U.
)

et al.

- Phys.Lett.B 263 (1991) 123-134
•
DOI:
- 10.1016/0370-2693(91)91717-A

Search for leptoquarks in Z0 decays

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 261 (1991) 169-176
•
DOI:
- 10.1016/0370-2693(91)91346-W

Search for scalar leptoquarks from Z0 decays

DELPHI

Collaboration

•

P. Abreu
(
- LIP, Lisbon
)

et al.

- Phys.Lett.B 275 (1992) 222-230
•
DOI:
- 10.1016/0370-2693(92)90878-8

Searches for new particles in $Z$ decays using the ALEPH detector

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Phys.Rept. 216 (1992) 253-340
•
DOI:
- 10.1016/0370-1573(92)90177-2

A Search for second generation leptoquarks in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 75 (1995) 1012-1016
•
DOI:
- 10.1103/PhysRevLett.75.1012

Search for third generation leptoquarks in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 78 (1997) 2906-2911
•
DOI:
- 10.1103/PhysRevLett.78.2906

Search for first generation leptoquark pair production in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 79 (1997) 4327-4332
•
e-Print:
- hep-ex/9708017
•
DOI:
- 10.1103/PhysRevLett.79.4327

Search for second generation leptoquarks in the dimuon plus dijet channel of $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 81 (1998) 4806-4811
•
e-Print:
- hep-ex/9810024
•
DOI:
- 10.1103/PhysRevLett.81.4806

Second generation leptoquark search in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

D0

Collaboration

•

S. Abachi

et al.

- Phys.Rev.Lett. 75 (1995) 3618-3623
•
e-Print:
- hep-ex/9507002
•
DOI:
- 10.1103/PhysRevLett.75.3618

Search for first generation scalar leptoquark pairs in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

D0

Collaboration

•

B. Abbott

et al.

- Phys.Rev.Lett. 80 (1998) 2051-2056
•
e-Print:
- hep-ex/9710032
•
DOI:
- 10.1103/PhysRevLett.80.2051

Search for charge 1/3 third generation leptoquarks in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

D0

Collaboration

•

B. Abbott

et al.

- Phys.Rev.Lett. 81 (1998) 38-43
•
e-Print:
- hep-ex/9803009
•
DOI:
- 10.1103/PhysRevLett.81.38

Production of scalar and vector leptoquarks in e+ e- annihilation

J. Blumlein
(
- DESY and
- Munich U.
)
,
R. Ruckl
(
- Munich U. and
- Munich, Max Planck Inst. and
- CERN
)

- Phys.Lett.B 304 (1993) 337-346,
- Muenchen MPI Phys. Astrophys. - MPI-Ph-92-113 (92/12,rec.Apr.93) 16 p. Muenchen Univ. - LMU-92-23 (92/12,rec.Apr.93) 16 p. CERN Geneva - TH. 6741 (92/12,rec.Apr.93) 16 p
•
DOI:
- 10.1016/0370-2693(93)90306-3

- Nucl.Phys.B Proc.Suppl. 37 181

The OPAL detector at LEP

OPAL

Collaboration

•

K. Ahmet

et al.

- Nucl.Instrum.Meth.A 305 (1991) 275-319
•
DOI:
- 10.1016/0168-9002(91)90547-4

1-25 of 42
1
2
25 / page

Search for pair produced leptoquarks in e+e−e^{+} e^{-}e+e− interactions at S(1/2)S^{(1/2)}S(1/2) approximately = 183-GeV

Citations per year

Search for pair produced leptoquarks in $e^{+} e^{-}$ interactions at $S^{(1/2)}$ approximately = 183-GeV