Evidence for the tau --> Neutrino rho pi Decay Mode

Annihilation of e + e − into final states with a single electron has been studied with the PLUTO detector at the DORIS storage ring at CMS energies from 3.6 to 5 GeV. In the sample of 4-prong events without any detected photon we observe 21 events which we assign to the reaction e + e − → τ + τ − → νν e + νϱ 0 π . We obtain a branching ratio for τ + → νϱ 0 π + of 0.050 ± 0.015 with an overall systematic uncertainty of 30%. The data are consistent with the ϱπ coming from an A 1 meson.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
HEAVY LEPTON: PAIR PRODUCTION
PAIR PRODUCTION: HEAVY LEPTON
HEAVY LEPTON: ELECTROPRODUCTION
ELECTROPRODUCTION: HEAVY LEPTON
HEAVY LEPTON: LEPTONIC DECAY
LEPTONIC DECAY: HEAVY LEPTON

References(15)

Figures(0)

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

Lifetimes and branching ratios of heavy leptons

H.B. Thacker
(
- UCLA
)
,
J.J. Sakurai
(
- UCLA
)

- Phys.Lett.B 36 (1971) 103-105
•
DOI:
- 10.1016/0370-2693(71)90119-5

Anomalous Muon Production in e+ e- Annihilation as Evidence for Heavy Leptons

PLUTO

Collaboration

•

J. Burmester
(
- DESY
)

et al.

- Phys.Lett.B 68 (1977) 297,
- Physics Letters B68 (1977) 297-300 and Hamburg Desy - DESY 77-24 (77,REC.MAY) 10p
•
DOI:
- 10.1016/0370-2693(77)90292-1

Evidence for Heavy Leptons from Anomalous mu e Production in e+ e- Annihilation

PLUTO

Collaboration

•

J. Burmester
(
- DESY
)

et al.

- Phys.Lett.B 68 (1977) 301-304
•
DOI:
- 10.1016/0370-2693(77)90293-3

Properties of Anomalous e mu Events Produced in e+ e- Annihilation

Martin L. Perl
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
G.J. Feldman
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
G.S. Abrams
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
M.S. Alam
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
A. Boyarski
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)

et al.

- Phys.Lett.B 63 (1976) 466,
- In *Rosner, J. L. ( Ed.): New Particles*, 93-97. ( Phys. Lett. B63 ( 1976) 466-470 and SLAC Stanford - SLAC-PUB-1781 (76,REC.SEP.) 16p
•
DOI:
- 10.1016/0370-2693(76)90399-3

Inclusive Anomalous Muon Production in e+ e- Annihilation

G.J. Feldman
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
F. Bulos
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
D. Luke
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
G.S. Abrams
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)
,
M.S. Alam
(
- SLAC and
- LBL, Berkeley and
- UC, Berkeley
)

et al.

- Phys.Rev.Lett. 38 (1977) 117,
- Phys.Rev.Lett. 38 (1977) 576 (erratum)
•
DOI:
- 10.1103/PhysRevLett.38.117

Electron-Muon and electron-Hadron Production in e+ e- Collisions

et al.

- Phys.Rev.Lett. 39 (1977) 1058
•
DOI:
- 10.1103/PhysRevLett.39.1058

The Search for the a1 Meson

H.E. Haber
(
- Michigan U.
)
,
Gordon L. Kane
(
- Michigan U.
)

- Nucl.Phys.B 129 (1977) 429-460
•
DOI:
- 10.1016/0550-3213(77)90126-2

Review of Particle Properties. Particle Data Group

T.G. Trippe
(
- LBL, Berkeley
)
,
A. Barbaro-Galtieri
(
- LBL, Berkeley
)
,
R.L. Kelly
(
- LBL, Berkeley
)
,
A. Rittenberg
(
- LBL, Berkeley
)
,
A.H. Rosenfeld
(
- LBL, Berkeley
)

et al.

- Rev.Mod.Phys. 48 (1976) S1-S246,
- Rev.Mod.Phys. 48 (1976) 497 (erratum),
- Rev.Mod.Phys.48 (1976) No.2 Part Ii S1-s246
•
DOI:
- 10.1103/RevModPhys.48.S1

The Total Hadronic Cross-Section for e+ e- Annihilation Between 3.1-GeV and 4.8-GeV Center-Of-Mass Energy

PLUTO

Collaboration

•

J. Burmester
(
- DESY
)

et al.

- Phys.Lett.B 66 (1977) 395-400
•
DOI:
- 10.1016/0370-2693(77)90023-5

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

On the Origin of Inclusive electron Events in e+ e- Annihilation Between 3.6-GeV and 5.2-GeV

DASP

Collaboration

•

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

et al.

- Phys.Lett.B 70 (1977) 125,
- Physics Letters B70 (1977) 125-131 and Hamburg Desy - DESY 77-36 (77,REC.JUN) 15p
•
DOI:
- 10.1016/0370-2693(77)90360-4

Study of D Mesons Produced in the Decay of the psi-prime-prime (3772)

et al.

- Phys.Rev.Lett. 39 (1977) 1301
•
DOI:
- 10.1103/PhysRevLett.39.1301

Search for Charm

- Rev.Mod.Phys. 47 (1975) 277-310
•
DOI:
- 10.1103/RevModPhys.47.277