Search for heavy neutral spinless particles using e+ e- ---> e+ e- and e+ e- ---> gamma gamma reactions in the center-of-mass energy range between 54-GeV and 64-GeV

Heavy neutral spinless particles are searched for using e + e − collision data of CM energies between 54 and 64 GeV, collected with the VENUS detector at TRISTAN. The existence of such a particle might explain the anomalous e + e − → l + l − γγ reaction recently reported by a LEP experiment. Negative results lead to constraints on the partial decay width of such particles to electrons: in narrow resonance cases, Γ ee < 1MeV from Bhabha scattering data and Γ ee ΓB γγ < 3 keV from γγ production data at the 95% CL for masses around 59 GeV/ c 2 .

electron positron: colliding beams
colliding beams: electron positron
electron positron: elastic scattering
elastic scattering: electron positron
electron positron: annihilation
annihilation: electron positron
photon: pair production
pair production: photon
new particle: search for
spinless

References(16)

Figures(0)

High mass photon pairs in lepton+ lepton- gamma gamma events at LEP

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Collaboration

•

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CELLO

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H.J. Behrend
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Search for Spinless Bosons in $e^+ e^-$ Annihilation

TASSO

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M. Althoff
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JADE

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Radiative Correction to $e^+ e^- \to e^+ e^-$ in the Electroweak Theory. 1. Cross-sections for Hard Photon Emission

K. Tobimatsu
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Y. Shimizu
(
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Radiative Correction to $e^+ e^- \to e^+ e^-$ in the Electroweak Theory. 2. Corrected Elastic Cross-section and Positron Energy Spectrum

K. Tobimatsu
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BHABHA SCATTERING AT HIGH-ENERGY

S. Kuroda
(
- Nagoya U. and
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)
,
T. Kamitani
(
- Nagoya U. and
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,
S. Kawabata
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- Nagoya U. and
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VENUS

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K. Abe
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Distributions for $e^+ e^- \to 3 \gamma$ at High-energy

Junpei Fujimoto
(
- Nagoya U.
)
,
Masataka Igarashi
(
- Tokai U., Hiratsuka
)

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Radiative Correction to $e^+ e^- \to \gamma \gamma$ in Electroweak Theory

Junpei Fujimoto
(
- Nagoya U.
)
,
Masataka Igarashi
(
- Tokai U., Hiratsuka
)
,
Yoshimitsu Shimizu
(
- KEK, Tsukuba
)

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•
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