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    Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP (English)

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    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; 623 , 1-2 ; 26-36  ; 2005
    • ISSN:
      0370-2693
    • Article (Journal)  /  Electronic Resource

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    AbstractThe evolution of the electromagnetic coupling, α, in the momentum-transfer range 1800   GeV 2 < − Q 2 < 21600   GeV 2 is studied with about 40 000 Bhabha-scattering events collected with the L3 detector at LEP at centre-of-mass energies s = 189 – 209   GeV . The running of α is parametrised as: α ( Q 2 ) = α 0 1 − C Δ α ( Q 2 ) , where α 0 ≡ α ( Q 2 = 0 ) is the fine-structure constant and C = 1 corresponds to the evolution expected in QED. A fit to the differential cross section of the e + e − → e + e − process for scattering angles in the range | cos θ | < 0.9 excludes the hypothesis of a constant value of α, C = 0 , and validates the QED prediction with the result: C = 1.05 ± 0.07 ± 0.14 , where the first uncertainty is statistical and the second systematic.

    Table of contents – Volume 623, Issue 1-2

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    The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

    1
    Primordial magnetic seed fields from extra dimensions
    Kunze, Kerstin E. et al. | 2005
    10
    How many parameters in the cosmological models with dark energy?
    Godłowski, Włodzimierz / Szydłowski, Marek et al. | 2005
    17
    Central-to-peripheral nuclear modification factors in Pb–Pb collisions at s NN = 17.3   GeV
    Antinori, F. / Bacon, P.A. / Badalà, A. / Barbera, R. / Belogianni, A. / Bloodworth, I.J. / Bombara, M. / Bruno, G.E. / Bull, S.A. / Caliandro, R. et al. | 2005
    17
    Central-to-peripheral nuclear modification factors in Pb-Pb collisions at Formula Not Shown
    Antinori, F. / Bacon, P. A. / Badala, A. / Barbera, R. / Belogianni, A. / Bloodworth, I. J. / Bombara, M. / Bruno, G. E. / Bull, S. A. et al. | 2005
    26
    Measurement of the running of the electromagnetic coupling at large momentum-transfer at LEP
    Achard, P. / Adriani, O. / Aguilar-Benitez, M. / Alcaraz, J. / Alemanni, G. / Allaby, J. / Aloisio, A. / Alviggi, M.G. / Anderhub, H. / Andreev, V.P. et al. | 2005
    37
    Study of the lowest Formula Not Shown excitations and B(E2) transition strengths in relativistic QRPA for Sn-, and Pb-isotopes
    Ansari, A. et al. | 2005
    37
    Study of the lowest 2 + excitations and B(E2) transition strengths in relativistic QRPA for Sn-, and Pb-isotopes
    Ansari, A. et al. | 2005
    43
    Kinetic energy spectra for fragments and break-up density in multifragmentation
    Raduta, Ad.R. / Borderie, B. / Bonnet, E. / Le Neindre, N. / Piantelli, S. / Rivet, M.F. et al. | 2005
    48
    Quark–antiquark condensates in the hadronic phase
    Tawfik, A. / Toublan, D. et al. | 2005
    55
    Estimating the I = 3 / 2 Kπ interaction in D decay
    Edera, L. / Pennington, M.R. et al. | 2005
    55
    Estimating the Formula Not Shown Kp interaction in D decay
    Edera, L. / Pennington, M. R. et al. | 2005
    65
    B → K 1 γ and tests of factorization for two-body non-leptonic B decays with axial-vector mesons
    Nardulli, G. / Pham, T.N. et al. | 2005
    65
    Formula Not Shown and tests of factorization for two-body non-leptonic B decays with axial-vector mesons
    Nardulli, G. / Pham, T. N. et al. | 2005
    73
    Updating algorithms with multi-step stochastic correction
    Montvay, I. / Scholz, E. et al. | 2005
    80
    KamLAND neutrino spectra in energy and time: Indications for reactor power variations and constraints on the georeactor
    Fogli, G.L. / Lisi, E. / Palazzo, A. / Rotunno, A.M. et al. | 2005
    93
    Yukawa induced radiative corrections to the lightest Higgs boson mass in the NMSSM
    Ellwanger, Ulrich / Hugonie, Cyril et al. | 2005
    104
    Two-loop SUSY QCD correction to the gluino pole mass
    Yamada, Youichi et al. | 2005
    111
    Minimal string-scale unification of gauge couplings
    Emmanuel-Costa, D. / González Felipe, R. et al. | 2005
    119
    Revisiting 5D chiral symmetry breaking and holographic QCD models
    Mahajan, Namit et al. | 2005
    126
    An interpretation of multigraviton amplitudes
    Abe, Yasuhiro et al. | 2005
    135
    Thermodynamics of Formula Not Shown dilatonic black holes in global flat embedding scheme
    Hong, S. T. et al. | 2005
    135
    Thermodynamics of ( 1 + 1 ) dilatonic black holes in global flat embedding scheme
    Hong, Soon-Tae et al. | 2005
    141
    Quantum teleportation with sonic black holes
    Ge, Xian-Hui / Shen, You-Gen et al. | 2005
    147
    On the stability of field-theoretical regularizations of negative tension branes
    Nunes, N.J. / Peloso, Marco et al. | 2005
    155
    Worldline approach of topological BF theory
    Oda, Ichiro / Tonin, Mario et al. | 2005
    165
    The Kodama state for topological quantum field theory beyond instantons
    Cartas-Fuentevilla, R. / Tlapanco-Limón, J.F. et al. | 2005
    171
    Gravitating stationary dyons and rotating vortex rings
    Kleihaus, Burkhard / Kunz, Jutta / Neemann, Ulrike et al. | 2005
    179
    Non-relativistic scalar field on the quantum plane
    Jahan, A. et al. | 2005
    iii
    Editors
    | 2005
    v
    Instructions to authors
    | 2005

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