A numerical test of differential equations for one- and two-loop sunrise diagrams using configuration space techniques [PDF]
Eur. Phys. J. C72 (2012) 2085, 2012 We use configuration space methods to write down one-dimensional integral representations for one- and two-loop sunrise diagrams (also called Bessel moments) which we use to numerically check on the correctness of the second order differential equations for one- and two-loop sunrise diagrams that have recently been discussed in the literature.
A. A. Pivovarov +16 more
arxiv +3 more sources
Dispersive calculation of the massless multi-loop sunrise diagram [PDF]
Lett.Math.Phys.77:209-218,2006, 2006 The massless sunrise diagram with an arbitrary number of loops is calculated in a simple but formal manner. The result is then verified by rigorous mathematical treatment. Pitfalls in the calculation with distributions are highlighted and explained.
A. Aste +25 more
arxiv +5 more sources
A formula for the number of days between the winter solstice and the latest sunrise [PDF]
Am.J.Phys.71:1242-1246,2003, 2002 A simple closed-form expression for the number of days between the winter solstice and the latest sunrise is derived. Formulas for the summer solstice and the sunset are derived as well. These approximate formulas make it easy to see the functional dependence on the latitude of the observer.
di Cicco D., Matthias Reinsch
arxiv +4 more sources
Electrodynamics of the equatorial F-region ionosphere during pre-sunrise period [PDF]
Annales Geophysicae, 2009 The electrodynamics of the pre-sunrise equatorial F-region is investigated using HF Doppler radar and digital ionosonde. The observations are limited to those days for which the radar probing frequency is below the foF2 value.
S. R. Prabhakaran Nayar +8 more
doaj +5 more sources
On the evaluation of a certain class of Feynman diagrams in x-space: Sunrise-type topologies at any loop order [PDF]
AnnalsPhys.322:2374-2445,2007, 2005 We review recently developed new powerful techniques to compute a class of Feynman diagrams at any loop order, known as sunrise-type diagrams. These sunrise-type topologies have many important applications in many different fields of physics and we believe it to be timely to discuss their evaluation from a unified point of view.
A.A. Pivovarov +128 more
arxiv +3 more sources
Partial diallel to evaluate the combining ability for economically important traits of papaya Dialeto parcial para avaliar a capacidade combinatória de características de importância econômica do mamoeiro [PDF]
Scientia Agricola, 2006 The dependence of Brazil on imported improved papaya seeds was the main motivation for this research that primarily intended to evaluate the combining ability of eight genotypes from the 'Solo' group, crossed with eight genotypes from the 'Formosa' group
Sergio Lucio David Marin +4 more
doaj +3 more sources
The Pseudothreshold Expansion of the 2-loop Sunrise Selfmass Master Amplitudes [PDF]
Nucl.Phys. B581 (2000) 274-294, 1999 The values at pseudothreshold of two loop sunrise master amplitudes with arbitrary masses are obtained by solving a system of differential equations. The expansion at pseudothreshold of the amplitudes is constructed and some lowest terms are explicitly presented.
Beneke +13 more
arxiv +3 more sources
Annales Geophysicae, 1995 It was noticed 60 years ago that at sunrise (i) the ionospheric critical frequency foF2 increases faster in winter than in summer and (ii) the increase begins at a greater solar zenith angle in winter.
H. Rishbeth, B. Jenkins, R. J. Moffett
doaj +5 more sources
Tequila Sunrise and Social Action
Athenea Digital, 2005 En este trabajo presentamos un ejercicio narrativo acerca de la acción social y las teorías hermenéuticas que han intentado definir o hablar acerca de la misma.
Camilo Aedo Valejos +5 more
doaj +6 more sources