A Measurement of Muon Pair Production in $e^+ e^-$ Annihilation at Center-of-mass Energies 35-{GeV} $\le \sqrt{s} \le$ 46.8-{GeV} - INSPIRE

DataBETA

A Measurement of Muon Pair Production in $e^+ e^-$ Annihilation at Center-of-mass Energies 35-{GeV} $\le \sqrt{s} \le$ 46.8-{GeV}

TASSO

Collaboration

May, 1988

19 pages

Published in:

Z.Phys.C 40 (1988) 163-170,
Z.Phys.C 42 (1989) 348 (erratum)

DOI:

10.1007/BF01555879

PDG:

\mathit A{}^{(0,{{\mathit \mu}})}_{\mathit FB}

CHARGE ASYMMETRY IN

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

\rightarrow

{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}

Report number:

DESY-88-059,
OXFORD-NP-33-88

Experiments:

DESY-PETRA-TASSO

View in:

KEK scanned document

reference search45 citations

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Abstract: (Springer)

The reactione+e−→µ+µ− has been studied at centre of mass energies between 35.0 and 46.8 GeV using the TASSO detector at PETRA. We present measurements of the forward-backward charge asymmetry (Aμμ) and cross section σμμ for this reaction at three energies. At 35.0 GeV we obtain a cross section relative to the QED prediction ofRμμ=σμμ/σo=0.932±0.018±0.044 andAμμ=(−10.6−2.3+2.2±0.5)%. At 38.3 GeV we findRμμ=0.951±0.072−0.057+0.063 andAμμ=(+1.7−8.6+8.5±0.5)%. At 43.6 GeV we measureRμμ=0.921±0.037±0.055 andAμμ=(−17.6−4.3+4.4±0.5)%. Our results are in good agreement with the predictions of the standard model. Including previous TASSO data we present improved determinations of muonic electroweak parameters. We also report on lower limits of possible contributions from contact interactions.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
MUON: ELECTROPRODUCTION
ELECTROPRODUCTION: MUON
MUON: PAIR PRODUCTION
PAIR PRODUCTION: MUON
CHARGE DISTRIBUTION: ASYMMETRY
ANGULAR DISTRIBUTION: ASYMMETRY

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