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Marcus Scholl 《Zeitschrift fur Physik C Particles and Fields》1985,28(4):545-553
A method to calculate superfield propagators for models with explicitly soft or spontaneously broken supersymmetry is presented. The Feynman rules for this case are shown to be slightly modified compared to the symmetric case. The method is also applied to an effective potential calculation. 相似文献
976.
Marcus Hutter 《Zeitschrift fur Physik C Particles and Fields》1997,74(1):131-143
Various QCD correlators are calculated in the instanton liquid model in zeromode approximation and 1/N c expansion. Previous works are extended by including dynamical quark loops. In contrast to the original “perturbative” 1/N c approximation, not all quark loops are suppressed. Renormalization of the instanton density allows the identification of the density with the gluon condensate even in presence of dynamical quark loops. In the flavor singlet meson correlators a chain of quark bubbles survives the N c → ∞ limit causing a massive η′ in the pseudoscalar correlator while keeping massless pions in the triplet correlator. The correlators are plotted and meson masses and couplings are obtained from a spectral fit. They are compared to the values obtained from numerical studies of the instanton liquid and to experimental results. 相似文献
977.
The production and the observability of Λ(1520), K0(892) Φ and Δ(1232) hadron resonances in central Pb+Pb collisions at 160 A GeV is addressed. The rescattering probabilities of the resonance decay products in the evolution are studied. Strong changes in the reconstructable particle yields and spectra between chemical and thermal freeze-out are estimated. Abundances and spectra of reconstructable resonances are predicted. 相似文献
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979.
Marcus E. Baumann Hans Bosshard Werner Breitenstein Günter Rist 《Helvetica chimica acta》1986,69(2):396-403
Preparation of Disubstituted Maleic Anhydrides from Reactive 2-Oxo-3H-imidazo[1,2-a]pyridinium Compounds A new useful method for the preparation of disubstituted maleic anhydrides, most of them bearing additional functional groups in the side chain, is described. The key step of the synthesis consists of the addition of 2-oxo-3H-imidazo[1,2-a]pyridinium compounds to a variety of different Michael acceptors. 相似文献
980.
Let C(S) be the space of real-valued continuous functions on a compact metric space S. Let {Xn, n ? 1} be a sequence of independent identically distributed C(S)-valued random variables with mean zero and supt?sE[X12(t)] = 1. We show that the measures induced by ( converge weakly to a Gaussian measure on C(S) under different conditions on X1, one of which consolidates and extends results of Strassen and Dudley, Giné, and Dudley. Our method of proof is different from the methods employed by these authors. 相似文献