1,721,222 research outputs found
P. Achard, A. Chauvenet, E. Lage et al., Discours biologique et ordre social
No full textGuillaumin Colette. P. Achard, A. Chauvenet, E. Lage et al., Discours biologique et ordre social. In: L'Homme, 1977, tome 17 n°4. pp. 123-125
Measurement of esclusive rho0rho0 production in two photon collitions at high Q**2 at LEP
No full text
Generalized event shape and energy flow studies in e+e- annihilation at sqrt(s) = 91.2-208.0 GeV
No full textWe present results from a study of hadronic event structure in high energy e(+)e(-') interactions using the L3 detector at LEP. A new class of event shape distributions are measured at and above the Z boson pole for light quark (u, d, s, c) flavours. Energy flow correlations are studied for all hadronic events. Next-to-leading-log QCD calculations and QCD models with improved leading-log approximations are compared to data and good agreement is found at the Z-pole whereas some discrepancies are observed at higher centre-of-mass energies
Search for neutral Higgs bosons of the minimal supersymmetric standard model in e+e- interactions at s**(1/2)=209 GeV
No full textSearch for B0 decays to invisible final states and to nu anti-nu gamma
No full textWe establish upper limits on branching fractions for B0 decays to final states where the decay products are purely invisible (i.e., no observable final state particles) and for B0 decays to nu nubar gamma. Within the Standard Model, these decays have branching fractions that are below current experimental sensitivity, but various models of physics beyond the Standard Model predict significant contributions from these channels. Using 88.5 million B Bbar pairs collected at the Y(4S) resonance by the BaBar experiment at the PEP-II e+e- storage ring at the Stanford Linear Accelerator Center, we establish upper limits at the 90% confidence level of 22 x 10^-5 for the branching fraction of B0 -> invisible and 4.7 x 10^-5 for the branching fraction of B0 -> nu nubar gamma
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