Experimental mass limit for a fourth generation sequential lepton from $e^+e^-$ annihilations at $\sqrt{s} = 56$ GeV

A search for pair production of fourth-generation sequential leptons in e+e− annihilation at a center-of-mass energy s=56 GeV is reported. Event topologies corresponding to the cases where one particle decays leptonically while the other decays hadronically as well as those where both particles decay hadronically were explored. We set a 95%-confidence-level lower limit of 27.6 GeV/c2 for the mass of a fourth-generation lepton.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
HEAVY LEPTON: SEARCH FOR
HEAVY LEPTON: PAIR PRODUCTION
PAIR PRODUCTION: HEAVY LEPTON
HEAVY LEPTON: MASS
MASS: HEAVY LEPTON
LOWER LIMIT

References(13)

Figures(0)

Cloud Chamber Observations of Cosmic Rays at 4300 Meters Elevation and Near Sea-Level

Carl D. Anderson
(
- Caltech
)
,
Seth H. Neddermeyer
(
- Caltech
)

- Phys.Rev. 50 (1936) 263-271
•
DOI:
- 10.1103/PhysRev.50.263

Note on the Nature of Cosmic Ray Particles

S.H. Neddermeyer
(
- Caltech
)
,
C.D. Anderson
(
- Caltech
)

- Phys.Rev. 51 (1937) 884-886,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 32-34
•
DOI:
- 10.1103/PhysRev.51.884

Evidence for Anomalous Lepton Production in e+ - e- Annihilation

Martin L. Perl
(
- LBL, Berkeley and
- UC, Berkeley and
- SLAC
)
,
G.S. Abrams
(
- LBL, Berkeley and
- UC, Berkeley and
- SLAC
)
,
A. Boyarski
(
- LBL, Berkeley and
- UC, Berkeley and
- SLAC
)
,
Martin Breidenbach
(
- LBL, Berkeley and
- UC, Berkeley and
- SLAC
)
,
D. Briggs
(
- LBL, Berkeley and
- UC, Berkeley and
- SLAC
)

et al.

- Phys.Rev.Lett. 35 (1975) 1489-1492,
- In *Lichtenberg, D. B. ( Ed.), Rosen, S. P. ( Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 210-213,
- ,
- In *Rosner, J.L. (ed.): New Particles*, 89-92
•
DOI:
- 10.1103/PhysRevLett.35.1489

Decay Correlations of Heavy Leptons in e+ e- ---> Lepton+ Lepton-

Yung-Su Tsai
(
- SLAC
)

- Phys.Rev.D 4 (1971) 2821,
- Phys.Rev.D 13 (1976) 771 (erratum)
•
DOI:
- 10.1103/PhysRevD.13.771

A Study of Heavy Lepton Production in e+ e- Annihilation

Kazuo Fujikawa
(
- DESY
)
,
Noboru Kawamoto
(
- Tokyo Inst. Tech.
)

- Phys.Rev.D 14 (1976) 59
•
DOI:
- 10.1103/PhysRevD.14.59

Measurements of $R$ and a search for heavy quark production in $e^+e^-$ annihilation at $\sqrt{s} = 50$ GeV and 52 GeV

AMY

Collaboration

•

H. Sagawa

et al.

- Phys.Rev.Lett. 60 (1988) 93
•
DOI:
- 10.1103/PhysRevLett.60.93

Search for isolated leptons in low thrust $e^+e^-$ annihilation events at $\sqrt{s} = 50$ GeV and 52-GeV

AMY

Collaboration

•

S. Igarashi

et al.

- Phys.Rev.Lett. 60 (1988) 2359
•
DOI:
- 10.1103/PhysRevLett.60.2359

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics. Jetset Version 6.3: An Update

- Comput.Phys.Commun. 43 (1987) 367
•
DOI:
- 10.1016/0010-4655(87)90054-3

A QCD Test for Jets

Edward Farhi
(
- Harvard U.
)

- Phys.Rev.Lett. 39 (1977) 1587-1588
•
DOI:
- 10.1103/PhysRevLett.39.1587

A Search for Charged Scalar Particles Pair Produced in $e^+ e^-$ Annihilation

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Phys.Lett.B 114 (1982) 211-216
•
DOI:
- 10.1016/0370-2693(82)90149-6

Events with Large Missing Transverse Energy at the CERN Collider: Search for Decays of W+- Into Heavy Leptons and of Z0 Into Noninteracting Particles. 2.

UA1

Collaboration

•

C. Albajar
(
- CERN
)

et al.

- Phys.Lett.B 185 (1987) 241-248,
- Phys.Lett.B 191 (1987) 463 (addendum),
- Phys.Lett.B 197 (1987) 565 (erratum)
•
DOI:
- 10.1016/0370-2693(87)91562-0

A Search for Sequential Heavy Leptons at the Energy $\sqrt{s}=52$ -{GeV} at Tristan

Venus

Collaboration

•

H. Yoshida
(
- Fukui U.
)

et al.

- Phys.Rev.Lett. 59 (1987) 2915
•
DOI:
- 10.1103/PhysRevLett.59.2915

Search for Sequential Heavy Leptons in $e^+ e^-$ Collisions at $\sqrt{s}=52$ -{GeV}

TOPAZ

Collaboration

•

I. Adachi

et al.

- Phys.Rev.D 37 (1988) 1339
•
DOI:
- 10.1103/PhysRevD.37.1339

Experimental mass limit for a fourth generation sequential lepton from e+e−e^+e^-e+e− annihilations at s=56\sqrt{s} = 56s​=56 GeV

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Experimental mass limit for a fourth generation sequential lepton from $e^+e^-$ annihilations at $\sqrt{s} = 56$ GeV