588 citations · 764 across the 22 of their papers we have counts for
22 papers
Simple analytic QCD model with perturbative QCD behavior at high momenta
Carlos Contreras, Gorazd Cvetic, Olivier Espinosa +1
Analytic QCD models are those where the QCD running coupling has the physically correct analytic behavior, i.e., no Landau singularities in the Euclidean regime. We present a simpl…
On the evaluation of Matsubara sums
Olivier Espinosa
Given a connected (multi)graph G, consisting of V vertices and I lines, we consider a class of multidimensional sums constructed in the following way: - orient the lines of the gra…
The evaluation of Tornheim double sums. Part2
Olivier Espinosa, Victor H. Moll
We provide an explicit formula for the Tornheim double series T(a,0,c) in terms of an integral involving the Hurwitz zeta function. For integer values of the parameters, a=m, c=n,…
Thermal Operator and Cutting Rules at Finite Temperature and Chemical Potential
F. T. Brandt, Ashok Das, Olivier Espinosa +2
In the context of scalar field theories, both real and complex, we derive the cutting description at finite temperature (with zero/finite chemical potential) from the cutting rules…
Thermal Operator Representation of Finite Temperature Graphs II
Fernando T. Brandt, Ashok Das, Olivier Espinosa +2
Using the mixed space representation, we extend our earlier analysis to the case of Dirac and gauge fields and show that in the absence of a chemical potential, the finite temperat…
Factorization of finite temperature graphs in thermal QED
Fernando T. Brandt, Ashok Das, Olivier Espinosa +2
We extend our previous analysis of gauge and Dirac fields in the presence of a chemical potential. We consider an alternate thermal operator which relates in a simple way the Feynm…