scholarly journals First moments of nucleon generalized parton distributions in chiral perturbation theory at full one-loop order

2014 ◽  
Vol 89 (11) ◽  
Author(s):  
Philipp Wein ◽  
Peter C. Bruns ◽  
Andreas Schäfer
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Loop Order ◽  
Chiral Perturbation ◽  
Parton Distributions ◽  
Generalized Parton Distributions

scholarly journals CHIRAL PERTURBATION THEORY STUDY OF THE AXIAL N → Δ(1232) TRANSITION

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2246-2249 ◽  
Author(s):  
L. S. GENG ◽  
J. MARTIN CAMALICH ◽  
L. ALVAREZ-RUSO ◽  
M. J. VICENTE VACAS
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Theoretical Study ◽  
Form Factors ◽  
Transition Form ◽  
Loop Order ◽  
Chiral Perturbation

We have performed a theoretical study of the axial Nucleon to Delta(1232) (N → Δ) transition form factors up to one-loop order in covariant baryon chiral perturbation theory within a formalism in which the unphysical spin-1/2 components of the Δ fields are decoupled.

scholarly journals ChPT loops for the lattice: pion mass and decay constant, HVP at finite volume and nn̅-oscillations

2018 ◽  
Vol 175 ◽  
pp. 06011
Author(s):  
Johan Bijnens
Keyword(s):  
Perturbation Theory ◽  
Finite Volume ◽  
Chiral Perturbation Theory ◽  
Vacuum Polarization ◽  
Decay Constant ◽  
Pion Mass ◽  
Loop Order ◽  
Chiral Perturbation ◽  
Lattice Calculations

I present higher loop order results for several calculations in Chiral perturbation Theory. 1) Two-loop results at finite volume for hadronic vacuum polarization. 2) A three-loop calculation of the pion mass and decay constant in two-flavour ChPT. For the pion mass all needed auxiliary parameters can be determined from lattice calculations of ππ-scattering. 3) Chiral corrections to neutron-anti-neutron oscillations.

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