نتایج جستجو برای: and 0.744

تعداد نتایج: 16827182  

1996
V. A. Smirnov

An algorithm to construct analytic approximations to two-loop diagrams describing their behaviour at small non-zero thresholds is discussed. For some special cases (involving two different-scale mass parameters), several terms of the expansion are obtained. ∗ Presented at QCD and QED in Higher Order, 1996 Zeuthen Workshop on Elementary Particle Theory, Rheinsberg, April 21–26, 1996, to appear i...

1995
K. G. Chetyrkin J. H. Kühn M. Steinhauser

The real and imaginary part of the vacuum polarisation function Π(q2) induced by a massive quark is calculated in perturbative QCD up to order αs. The method is described and the results are presented. This extends the calculation by Källén and Sabry from two to three loops. The complete postscript file of this preprint, including figures, is available via anonymous ftp at ttpux2.physik.uni-kar...

2013
Xavier Rodó Mercedes Pascual Francisco J. Doblas-Reyes Alexander Gershunov Dáithí A. Stone Filippo Giorgi Peter J. Hudson James Kinter Miquel-Àngel Rodríguez-Arias David Alonso Javier García-Serrano Andrew P. Dobson

The next generation of climate-driven, disease prediction models will most likely require a mechanistically based, dynamical framework that parameterizes key processes at a variety of locations. Over the next two decades, consensus climate predictions make it possible to produce forecasts for a number of important infectious diseases that are largely independent of the uncertainty of longer-ter...

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