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    High mass photon pairs in ℓ+ℓ− γγ events at LEP (English)

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    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; 295 , 3-4 ; 337-346  ; 1992
    • ISSN:
      0370-2693
    • Article (Journal)  /  Electronic Resource

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    Abstract From the analysis of the reactions e+e−→l + l −(nγ) (l=e,μ,τ) we observe four events, one e+e− γγ and three μ + μ − γγ, with the invariant mass of the photon pairs close to 60 GeV. These events were selected from a data sample collected in the L3 detector corresponding to 950 000 produced Z0's. More data are necessary to ascertain the origin of these events.

    Table of contents – Volume 295, Issue 3-4

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    187
    Nonradiative pt capture rate in the ptμ molecule
    Zubarev, A.L. et al. | 1992
    190
    The M-truncated KP hierarchy and matrix models
    Aoyama, S. / Kodama, Y. et al. | 1992
    199
    The Uqsl(3) 6-j symbols and state sum model
    Archer, F.J. et al. | 1992
    209
    Perturbative analysis of an n-Ising model on a random surface
    Hikami, Shinobu / Brézin, Edouard et al. | 1992
    214
    Strings in strong gravitational fields
    De Vega, H.J. / Nicolaidis, A. et al. | 1992
    219
    Fractionally charged particles and supersymmetry breaking in 4D strings
    Antoniadis, I. / Benakli, K. et al. | 1992
    225
    More on Q-kinks: a (1+1)-dimensional analogue of dyons
    Abraham, E.R.C. / Townsend, P.K. et al. | 1992
    233
    Towards the exact spectrum of the three-anyon problem
    Mashkevich, Stefan V. et al. | 1992
    237
    Can the electroweak model be extended to support instanton solutions?
    Sherry, T.N. / Tchrakian, D.H. et al. | 1992
    242
    Quantum mechanics on a lattice and q-deformations
    Dimakis, A. / Müller-Hoissen, F. et al. | 1992
    249
    Crossover between weakly and strongly self-avoiding random surfaces
    Baillie, C.F. / Johnston, D.A. et al. | 1992
    255
    Mass sensitivity of chiral symmetry restoration at finite temperature
    Meyer-Ortmanns, H. / Pirner, H.-J. / Patkós, A. et al. | 1992
    263
    Electroproduction structure function F 2 in the low Q 2, low x region
    Badełek, B. / Kwieciński, J. et al. | 1992
    263
    Electroproduction structure function F~2 in the low Q^2, low chi region
    Badelek, B. / Kwiecinski, J. et al. | 1992
    269
    Jet broadening measures in e+e− annihilation
    Catani, S. / Turnock, G. / Webber, B.R. et al. | 1992
    277
    Determining the polarized parton distributions of the proton via jet handedness
    Stratmann, M. / Vogelsang, W. et al. | 1992
    283
    Polarised gluon distributions and inelastic leptoproduction of J/ψ
    Sridhar, K. / Leader, E. et al. | 1992
    283
    Polarised gluon distributions and inelastic leptoproduction of J/cap psi
    Sridhar, K. / Leader, E. et al. | 1992
    289
    Radiative decays of narrow toponium and Higgs boson: cap theta->gammaH and H->cap theta gamma
    Achasov, N. N. / Besprozvannykh, V. K. et al. | 1992
    289
    Radiative decays of narrow toponium and Higgs boson: Θ→γH and H→Θγ
    Achasov, N.N. / Besprozvannykh, V.K. et al. | 1992
    293
    Decays of B mesons into light hadrons
    Greub, C. / Wyler, D. et al. | 1992
    301
    QCD sum rule calculation of the B→Dℓν ℓ form factors
    Nasrallah, N.F. / Pirjol, D. / Schilcher, K. / Wu, Y.L. et al. | 1992
    301
    QCD sum rule calculation of the B -> Dlv~l form factors
    Nasrallah, N. F. / Pirjol, D. / Schilcher, K. / Wu, Y. L. et al. | 1992
    308
    The low-energy theorem for a 1→π(ππ)S-wave decay
    Ivanov, A.N. / Nagy, M. / Troitskaya, N.I. et al. | 1992
    308
    The low-energy theorem for a->()~S~-~w~a~v~e decay
    Ivanov, A. N. / Nagy, M. / Troitskaya, N. I. et al. | 1992
    313
    Dynamical mass generation in QED3 and the 1/N expansion
    Curtis, D.C. / Pennington, M.R. / Walsh, D. et al. | 1992
    320
    Descriptions of charged-particle multiplicity distributions in e^+e^- annihilation at TRISTAN and LEP1 energies from AMY, ALEPH, OPAL and DELPHI collaborations
    Krasznovszky, S. / Wagner, I. et al. | 1992
    320
    Description of charged-particle multiplicity distributions in e + e − annihilation at TRISTAN and LEP1 energies from AMY, ALEPH, OPAL and DELPHI collaborations
    Krasznovszky, S. / Wagner, I. et al. | 1992
    324
    Single selectron production at TeV eγ colliders
    Kon, Tadashi / Goto, Akihiro et al. | 1992
    324
    Single selectron production at TeV egamma colliders
    Kon, T. / Goto, A. et al. | 1992
    330
    Search for neutralino dark matter with NaI detectors
    Bottino, A. / de Alfaro, V. / Fornengo, N. / Mignola, G. / Scopel, S. / Bacci, C. / Belli, P. / Bernabei, R. / Changjiang, Dai / Linkai, Ding et al. | 1992
    337
    High mass photon pairs in ℓ+ℓ− γγ events at LEP
    Adriani, O. / Aguilar-Benitez, M. / Ahlen, S. / Alcaraz, J. / Aloisio, A. / Alverson, G. / Alviggi, M.G. / Ambrosi, G. / An, Q. / Anderhub, H. et al. | 1992
    337
    High mass photon pairs in l^+l^-gamma gamma events at LEP
    | 1992
    347
    A search for doubly charged Higgs production in Z0 decays
    Acton, P.D. / Alexander, G. / Allison, J. / Allport, P.P. / Anderson, K.J. / Arcelli, S. / Astbury, A. / Axen, D. / Azuelos, G. / Bahan, G.A. et al. | 1992
    357
    Evidence for the existence of the strange b-flavoured meson Bs 0 in Z0 decays
    Acton, P.D. / Alexander, G. / Allison, J. / Allport, P.P. / Anderson, K.J. / Arcelli, S. / Astbury, A. / Axen, D. / Azuelos, G. / Bahan, G.A. et al. | 1992
    357
    Evidence for the existence of the strange b-flavored meson B^0~s in Z^0 decays
    | 1992
    371
    Search for isosinglet neutral heavy leptons in Z0 decays
    Adriani, O. / Aguilar-Benitez, M. / Ahlen, S. / Alcaraz, J. / Aloisio, A. / Alverson, G. / Alviggi, M.G. / Ambrosi, G. / An, Q. / Anderhub, H. et al. | 1992
    383
    Classification of the hadronic decays of the Z0 into b and c quark pairs using a neural network
    Abreu, P. / Adam, W. / Adye, T. / Agasi, E. / Alekseev, G.D. / Algeri, A. / Allen, P. / Almehed, S. / Alvsvaag, S.J. / Amaldi, U. et al. | 1992
    396
    Measurements of mean lifetime and branching fractions of b hadrons decaying to J/psi
    | 1992
    396
    Measurements of mean lifetime and branching fractions of b hadrons decaying to J/ψ
    Buskulic, D. / Decamp, D. / Goy, C. / Lees, J.-P. / Minard, M.-N. / Mours, B. / Alemany, R. / Ariztizabal, F. / Comas, P. / Crespo, J.M. et al. | 1992
    409
    Erratum
    | 1992
    410
    Cumulative author index to volumes 291–295
    | 1992

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