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Open AccessJournal ArticleDOI

Search for decays of the Z0 into a photon and a pseudoscalar meson

D. Decamp, +354 more
- 24 May 1990 - 
- Vol. 241, Iss: 4, pp 635-643
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TLDR
In this paper, a search for π 0 γ final states, in which the two photons from the Z 0 decay are unresolved, the production of pairs of high-energy electromagnetic clusters is studied.
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This article is published in Physics Letters B.The article was published on 1990-05-24 and is currently open access. It has received 7 citations till now. The article focuses on the topics: Branching fraction & Meson.

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Searches for new particles in $Z$ decays using the ALEPH detector

D. Decamp, +403 more
- 01 Jan 1992 - 
TL;DR: In this paper, a comprehensive set of mass and coupling limits are presented for a number of rare hadronic and leptonic decays at the e+e− collider at the LEP, and the searches performed by ALEPH for Higgs bosons, supersymmetric particles, and for evidence of compositeness are reviewed.
Journal ArticleDOI

Quantum gravity and the large scale structure of the universe

TL;DR: The authors showed that generic asymptotic freedom in the gravitational coupling leads to an increased power of the two-point correlation function at large distances and to a greater Jean's length than the one for the usual ( ω 0 = 1) Cold Dark Matter (CDM) models.
Journal ArticleDOI

Measurement of the cross sections of the reactions e+e− → γγ and e+e− → γγγ at LEP

M. Z. Akwawy, +290 more
- 28 Mar 1991 - 
TL;DR: The cross section of the pure QED process e + e − → γγ has been measured using data accumulated during the 1989 and 1990 scans of the Z 0 resonance at LEP as discussed by the authors.
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The reaction e+e− → γγ(γ) at Z0 energies

P. Abreu, +522 more
- 05 Jul 1991 - 
TL;DR: In this article, the total and differential cross-sections for the reaction e + e − → γγ ( γ ) are measured at centre of mass energies around 91 GeV using an integrated luminosity of 4.7 pb −1.
References
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Journal ArticleDOI

Aleph: a detector for electron-positron annihilations at Lep

D. Decamp, +474 more
TL;DR: This paper presents a solution to support strategic processes in a PSEE by providing a flexible guidance during process enactment and shows that supporting processes is more concerned with the flexibility of guidance offered during the process performance than with enforcement of a collection of predefined process models.
Journal ArticleDOI

Review of particle properties

TL;DR: In this paper, a review of the properties of leptons, mesons, and baryons is presented, along with several tables, figures, and formulae of interest to particle physicists.
Journal Article

Review of Particle Properties

TL;DR: Brickman, C., Dionisi, C.; Hemingway, R.J., Mazzucato, M., Montanet, L., Barash-Schmidt, N., Crawford, R., Kelly, R, Losty, M.G., Yost, G.P.; Armstrong, B.P., Rittenberg, A., Trippe, T.
Journal ArticleDOI

Multiple bremsstrahlung in gauge theories at high energies (II). Single bremsstrahlung

TL;DR: In this article, the helicity amplitudes for the QED processes e+e−→γγγ, μ+μ−γ, and e +e−γ were calculated in the limit of vanishing fermion masses.