Determination of the Electronic Branching Ratio of the $\Upsilon$ (9.46) and an Upper Limit for Its Total Width

Berger, Christoph; Lackas, W.; Raupach, F.; Wagner, W.; Alexander, G.; Burger, J.; Criegee, L.; Dehne, H.C.; Devenish, R.; Flugge, G.

doi:10.1016/0370-2693(80)90374-3

Determination of the Electronic Branching Ratio of the $\Upsilon$ (9.46) and an Upper Limit for Its Total Width

PLUTO

Collaboration

•

Christoph Berger
(
- Aachen, Tech. Hochsch.
)

Mar, 1980

3 pages

Published in:

Phys.Lett.B 93 (1980) 497-499

Published: 1980

DOI:

10.1016/0370-2693(80)90374-3

PDG:

{{\mathit \Upsilon}{(1S)}}

\rightarrow

{{\mathit e}^{+}}{{\mathit e}^{-}}

Report number:

DESY-80-15

Experiments:

DESY-PETRA-PLUTO-2

reference search29 citations

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Abstract: (Elsevier)

We have measured the reaction e + e − → e + e − at the ϒ Using athe excess of electron pairs over the QED expectation we obtain an electronic branching ratio of B ee = (5.1 ± 3.0) %. Combining this with publishe values of the muonic branching ratio B μμ we conclude that the ϒ is a narrow state with a total width < 180 keV at 95% C.L.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
UPSILON(9500): ELECTROPRODUCTION
ELECTROPRODUCTION: UPSILON(9500)
UPSILON(9500): LEPTONIC DECAY
LEPTONIC DECAY: UPSILON(9500)
UPSILON(9500): ELECTROMAGNETIC DECAY
ELECTROMAGNETIC DECAY: UPSILON(9500)

References(10)

Figures(0)

Observation of a Dimuon Resonance at 9.5-GeV in 400-GeV Proton-Nucleus Collisions

E288

Collaboration

•

S.W. Herb
(
- Columbia U.
)

et al.

- Phys.Rev.Lett. 39 (1977) 252-255,
- In *Lichtenberg, D.B. (ed.), Rosen, S.P. (ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 214-255,
- In *Rosner, J.L. (ed.): New Particles*, 98-101,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 350-353
•
DOI:
- 10.1103/PhysRevLett.39.252

Observation of Structure in the $\Upsilon$ Region

E288

Collaboration

•

Walter R. Innes
(
- Fermilab
)

et al.

- Phys.Rev.Lett. 39 (1977) 1240-1242,
- Phys.Rev.Lett. 39 (1977) 1640 (erratum),
- In *Rosner, J. L. ( Ed.): New Particles*, 102-104.
•
DOI:
- 10.1103/PhysRevLett.39.1240

Measurement of Leptonic Branching Ratios of the $\Upsilon$ (9.46)

PLUTO

Collaboration

•

Christoph Berger
(
- Aachen, Tech. Hochsch.
)

et al.

- Z.Phys.C 1 (1979) 343
•
DOI:
- 10.1007/BF01546972

Observation of a Narrow Resonance at 9.46-GeV in electron-Positron Annihilations

et al.

- Phys.Lett.B 76 (1978) 246,
- In *Rosner, J. L. ( Ed.): New Particles*, 109-111. ( Phys. Lett. B76 ( 1978) 246-248 and Hamburg Desy - DESY 78-22 (78,REC.MAY) 6p
•
DOI:
- 10.1016/0370-2693(78)90288-5

Observation of a Narrow Resonance at 10.02-GeV in e+ e- Annihilations

et al.

- Phys.Lett.B 78 (1978) 360-363,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 357-360,
- In *Rosner, J.L. (ed.): New Particles*, 112-115
•
DOI:
- 10.1016/0370-2693(78)90040-0

STUDY OF THE UPSILON (9.46) MESON IN ELECTRON - POSITRON ANNIHILATIONS

et al.

- Phys.Lett.B 80 (1979) 419-422
•
DOI:
- 10.1016/0370-2693(79)91204-8

alpha**3 Contribution to the angular asymmetry in e+ e- ---> mu+ mu-

- Nucl.Phys.B 63 (1973) 381-397
•
DOI:
- 10.1016/0550-3213(73)90153-3

Hard photon corrections for Bhabha scattering

Frits A. Berends
(
- CERN and
- Leiden U.
)
,
K.J.F. Gaemers
(
- Leiden U.
)
,
R. Gastmans
(
- CERN and
- Leuven U.
)

- Nucl.Phys.B 68 (1974) 541-550
•
DOI:
- 10.1016/0550-3213(74)90329-0

Radiative Corrections to Bhabha Scattering and mu Pair Production from the Hadronic Vacuum Polarization

Frits A. Berends
(
- Leiden U.
)
,
G.J. Komen
(
- Leiden U.
)

- Phys.Lett.B 63 (1976) 432-434
•
DOI:
- 10.1016/0370-2693(76)90389-0

Orthocharmonium and e+ e- Annihilation

Thomas Appelquist
(
- Harvard U.
)
,
H.David Politzer
(
- Harvard U.
)

- Phys.Rev.Lett. 34 (1975) 43
•
DOI:
- 10.1103/PhysRevLett.34.43

Determination of the Electronic Branching Ratio of the Υ\UpsilonΥ (9.46) and an Upper Limit for Its Total Width

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Determination of the Electronic Branching Ratio of the $\Upsilon$ (9.46) and an Upper Limit for Its Total Width