93 citations · 448 across the 26 of their papers we have counts for
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Multiple Mellin-Barnes integrals with polygamma functions
Sumit Banik, Samuel Friot
Mellin-Barnes (MB) integrals appear in various branches of physics and mathematics and are, in particular, used as a standard tool for evaluating multi-loop, multi-scale Feynman in…
Sunset integrals with up to three mass scales in chiral perturbation theory: a comparative study of the Mellin-Barnes representation technique
Balasubramanian Ananthanarayan, Sumit Banik, Véronique Bernard +3
Sunset integrals are among the simplest of two-loop integrals that appear in perturbative quantum field theories and possess up to four distinct mass scales. By means of integratio…
Multiple Mellin-Barnes integrals with straight contours
Sumit Banik, Samuel Friot
We show how the conic hull method, recently developed for the analytic and non-iterative evaluation of multifold Mellin-Barnes (MB) integrals, can be extended to the case where the…
The three-loop QED contributions to the of charged leptons with two internal fermion loops and a class of Kampé de Fériet series
B. Ananthanarayan, Samuel Friot, Shayan Ghosh
The three-loop QED mass-dependent contributions to the of each of the charged leptons with two internal closed fermion loops, sometimes called $A^{(6)}_3\left(\frac{m_1}{m_2}…
Analytic representations of , , and in two loop chiral perturbation theory
B. Ananthanarayan, Johan Bijnens, Samuel Friot +1
In this work, we consider expressions for the masses and decay constants of the pseudoscalar mesons in chiral perturbation theory. These involve sunset diagrams and their d…
Analytic representation of in two loop chiral perturbation theory
B. Ananthanarayan, Johan Bijnens, Samuel Friot +1
We present an analytic representation of as calculated in three-flavour two-loop chiral perturbation theory, which involves expressing three mass scale sunsets in terms o…
Probing photon structure in DVCS on a photon target
M. El Beiyad, S. Friot, B. Pire +2
The factorization of the amplitude for the deeply virtual Compton scattering (DVCS) process gamma*(Q) gamma -> gamma gamma at high Q2 is demonstrated in two distinct kinematical do…
Anomalous GPDs in the photon
S. Friot, B. Pire, L. Szymanowski
We consider deeply virtual Compton scattering (DVCS) on a photon target, in the generalized Bjorken limit, at the Born order and in the leading logarithmic approximation. This lead…
Deeply Virtual Compton Scattering on a Photon and Generalized Parton Distributions in the Photon
S. Friot, B. Pire, L. Szymanowski
We consider deeply virtual Compton scattering on a photon target, in the generalized Bjorken limit, at the Born order and in the leading logarithmic approximation. We interpret the…
Asymptotic expansions of Feynman diagrams and the Mellin-Barnes representation
Samuel Friot, David Greynat
In this talk, we describe part of our recent work \cite{FGdeR05} (see also \cite{F05,G05}) that gives new results in the context of asymptotic expansions of Feynman diagrams using…
Long-distance contributions in Decays
Samuel Friot, David Greynat
This talk gives a short summary of some work \cite{FGEdeR04} realized in collaboration with E. de Rafael and concerning $K\raπ\ell^+ \ell^-$ decays, in a combined framework of Chir…
Asymptotics of Feynman Diagrams and The Mellin-Barnes Representation
Samuel Friot, David Greynat, Eduardo de Rafael
It is shown that the integral representation of Feynman diagrams in terms of the traditional Feynman parameters, when combined with properties of the Mellin--Barnes representation…
The L-R Correlator and its Chiral Condensates in the MHA and MHA+V' Approximations to Large-Nc QCD
Samuel Friot
In this talk, we describe part of a recent work on the correlation function of a V-A current with a V+A current in the framework of QCD in the limit of a large number of colours Nc…
Chiral Condensates, Q_7 and Q_8 Matrix Elements and Large-N_c QCD
Samuel Friot, David Greynat, Eduardo De Rafael
The correlation function of a current with a current is discussed within the framework of QCD in the limit of a large number of colours . Applications to the evalu…
Rare Kaon Decays Revisited
Samuel Friot, David Greynat, Eduardo De Rafael
We present an updated discussion of $K\raπ\bar{l} l$ decays in a combined framework of chiral perturbation theory and Large-- QCD, which assumes the dominance of a minimal nar…